JPH0990857A - Production of hologram and hologram recording medium - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily, stably and continuously photographs many sheets of the same holograms; etc., by using a subject original plate formed by sealing various kinds of subjects into a transparent block. SOLUTION: A photosensitive material 1 is brought into tight contact with the subject original plate 35 for hologram photographing and is subjected to hologram recording by irradiating the film with light from the photosensitive material film 1 side and, therefore, the many sheets of the same holograms are continuously, easily and stably photographed. The supporting film 3 on one surface of the photosensitive material film 1 is peeled and while the photosensitive material film 1 is rubbed with a roller 46, the exposed surfaces thereof are successively stuck to the subject original plate 35 and the stuck photosensitive material film 1 is successively peeled from one end while the film is pressed by the roller 46 after the exposure and, therefore, the intrusion of air bubbles, etc., does not arise. The good-quality holograms free from unequal peeling according to the peeling are produced.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hologram production method and a hologram recording body, and more particularly to a hologram production method and a produced hologram recording body which can stably produce a large number of the same holograms in succession. .

[0002]

2. Description of the Related Art In order to photograph a hologram for one subject, it is necessary to accurately fix the relative positions of the subject, the hologram recording photosensitive material and the laser light source. Then, in order to photograph a large number of the same holograms, this relative positioning that requires time and effort must be repeated many times, which is a time-consuming and labor-intensive task.

There is also a method in which one hologram original plate is prepared and then a large number of the same holograms are continuously copied by duplication. However, various objects other than the prepared original plate object or a large number of holograms of different colors are prepared. It could not be duplicated.

[0004]

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems of the prior art, and an object of the present invention is to make a hologram photographing object which is constructed by fixing various objects in a block body. It is an object of the present invention to provide a hologram production method and a hologram recording body produced by which the same hologram or a hologram reproducible by different illumination light can be easily and continuously photographed using an original plate.

[0005]

In order to achieve the above object, a hologram production method of the present invention is a hologram recording method in which a photosensitive material film is brought into close contact with a hologram photographing subject original plate and light is irradiated from the photosensitive material film side. A method for producing a hologram, wherein a supporting film on one side of the photosensitive material is peeled off while supplying a photosensitive material film in which both sides of the photosensitive material are sandwiched by a support film, and the peeled surface is directed to a hologram photographing object master plate. While squeezing the photosensitive material film from the opposite side to the hologram recording object master plate while squeezing it with a roller, irradiate light from the photosensitive material film side, then while pressing the photosensitive material film stuck from the hologram photographing object master plate with the roller Peel off from one end in order, and then place the protective film on the peeled surface of the peeled photosensitive material film. Paste, then, it is a method characterized by winding the photosensitive material film.

Another hologram producing method of the present invention is a hologram producing method in which a photosensitive material film is brought into close contact with a hologram photographing object master plate and light is irradiated from the photosensitive material film side to perform hologram recording. While supplying the photosensitive material film sandwiching both sides of the material with the support film, the support film on one side is peeled off, the peeled surface is directed to the hologram original plate and the photosensitive material film is rolled from the opposite side. While squeezing, it is sequentially attached to the subject master plate for hologram photography, light is irradiated from the photosensitive material film side, and then the photosensitive material film attached from the subject master plate for hologram photography is sequentially peeled from one end while being held by the roller, and the peeled photosensitive Color tuning film that widens the diffraction wavelength on the release surface of the material film Sequentially paste, then, it is a method characterized by winding the photosensitive material film.

In these cases, the hologram photographing object master plate is composed of a transparent solid block in which the hologram photographing object is enclosed.

In this hologram photographic subject original plate, a transparent protective transparent body is integrally provided on the front surface of a solid block, and on the back surface of the subject, a colorless transparent body, a colored transparent body or a black absorber, a reflecting mirror, a scattering body. It is preferable that any one of a plate, a coloring plate, a pattern plate, or a combination of two or more thereof, or a hologram provided integrally. Further, the subject may be a flat or curved mirror.

Further, in any of the above methods, the light emitted from the side of the photosensitive material film may be light of a plurality of different wavelengths.

The hologram recording material of the present invention is a long photosensitive material film comprising one or more adhesive layers or pressure-sensitive adhesive layers and one or more photosensitive material layers, and sandwiching both surfaces with a support film. It is characterized in that hologram recording areas having a constant dimension in the longitudinal direction of the film are periodically formed with a constant inter-frame spacing.

In this case, it is preferable to record the volume phase hologram in the hologram recording area. At this time, at least the hologram recording area may be subjected to a process of broadening the diffraction wavelength. Further, it is preferable that the support film on one surface side comprises a colored or patterned film, an adhesive layer or an adhesive layer, and a peelable cover film in order from the photosensitive material layer side.

Another hologram recording body of the present invention comprises, in order from the hologram observation side, a protective film, a hologram recording layer, a film having a color or pattern, directly or via an adhesive layer or an adhesive layer between the layers, It is characterized in that an adhesive layer or an adhesive layer and a peelable cover film are laminated.

In this case, the cover film may be peeled off, and the cover film may be adhered to the printed body with an adhesive layer or an adhesive layer thereon.

Further, the hologram recording layer also includes a wavelength-multiplexed volume phase hologram recorded on the hologram recording layer and subjected to a treatment for broadening the diffraction wavelength.

Another hologram recording body of the present invention is
A wavelength-multiplexed volume phase hologram is recorded, and a process for broadening the diffraction wavelength is performed.

In the hologram manufacturing method and hologram recording body of the present invention, since a photosensitive material film is brought into close contact with a hologram photographing object master plate and light is irradiated from the photosensitive material film side to perform hologram recording, a large number of identical holograms are recorded. You can easily and stably take a series of images. Also, peel off the support film on one side of the photosensitive material film, and while squeezing the photosensitive material film with the roller, sequentially attach it to the hologram recording subject master plate on the exposed surface, and after exposure, hold the attached photosensitive material film with the roller Since the peeling is performed sequentially from the beginning, it is possible to manufacture a high-quality hologram that does not entrap air bubbles and the like and does not cause peeling unevenness due to peeling.

[0017]

BEST MODE FOR CARRYING OUT THE INVENTION The hologram production method and the produced hologram recording body of the present invention will be specifically described below based on Examples. FIG. 1 shows a plan view (a), a front view (b), and a side view (c) of a hologram photographing object master plate 5 used in the present invention. And the protective glass 22 is placed on the substrate glass 21 in contact with or away from the substrate glass 21.
The space between the substrate glass 21 and the protective glass 22, which is not occupied by the subject S, is filled with the transparent filler 23, and the block-shaped hologram photographing subject original plate 5 is configured. Note that the shape of the block 5 is not limited to a rectangular parallelepiped, and as shown in the figure, it may have a shape such as a projection having a taper 25 in part so as to fit the original plate holder at the time of photographing, In addition, the protective glass 22
The substrate glass 21 does not have to be parallel.

The subject S is not limited to a normal three-dimensional object, but may be a reflecting mirror having a flat surface, a spherical surface, an aspherical surface, or the like, as will be described later. Further, instead of the substrate glass 21, various types such as relief type holograms, reflecting mirrors, scattering plates, coloring plates, pattern plates, etc. can be used.

The thickness from the outermost surface of the protective glass 22 to the surface of the substrate glass 21 on the side of the filler 23 depends on the coherence length of a light source (usually a laser) for photographing using the subject original plate 5. . Specifically, 1 / the coherence length of the light source
It should be 2 or less. Further, if the thickness is too thin, there is a problem in mechanical strength. This thickness is preferably 0.1 mm to 1000 mm, more preferably 1 mm to 30 mm. As a photographing light source, even a monochromatic light source that has passed through an interference filter can photograph images within the interference distance, but a laser having a large coherence distance is preferable. Particularly, a laser whose wavelength width is selected by an etalon is preferable. For example, helium neon laser which is a gas laser, argon laser, krypton laser, helium cadmium laser, dye laser which is a liquid laser, YAG laser which is a solid laser,
YAG (1/2) laser, ruby laser, semiconductor laser, etc. can be used.

In the configuration as shown in FIG. 1, the substrate glass 2
1 is preferably provided to give sufficient strength to the subject original plate 5, but can be omitted. Moreover, the strength of the subject original plate 5 can be improved by using the substrate glass 21 laminated not only with glass but also with a metallic base material. If the glass substrate 21 is black or colored, light can be absorbed inside the substrate glass 21, and stray light due to internal reflection at the interface between the substrate glass 21 and the air surrounding it can be reduced during photography. Obtainable.

The protective glass 22 is preferably as thin as mechanical strength allows. 0.5-3 mm is common. The filler 23 preferably has high transparency and small light scattering (low haze). Further, a glass substrate 21 and one having adhesiveness to the subject S are preferable from the viewpoint of durability. Moreover, since it is an object to intervene when the protective glass 22 and the subject S are united together, there is little entrapment of bubbles,
Further, it is preferable that the uneven surface has a viscosity that facilitates filling. When using an adhesive with excellent fluidity, in order to hold the block-shaped body as the subject original plate 5 during curing, a special device such as a padding member to prevent outflow from the surroundings Requires.

The preferable viscosity of the filler 23 is 1 to 100.
00 cps, more preferably 100 to 1000 cps
It is. The filler 23 must be curable and solventless when forming the original plate 5. If this is fluid, the positional relationship between the subject S and the hologram recording photosensitive material changes during hologram recording, which will be described later, so that it is impossible to record substantially the same number of the same holograms. This is also because it is impossible to remove the solvent after encapsulation. As the curing type of the filler 23, a thermosetting type, an ionizing radiation curing type, a two-component mixed curing type, a hot melt curing type (hot melt) and the like are preferable.

The material of the filler 23 is a natural rubber type,
Styrene-butadiene type, polyisobutylene type, isoprene type, natural rubber latex type, styrene butadiene latex type (above, rubber type), acrylic type, acrylic emulsion type (above, acrylic type), silicone type (above, silicone type), Styrene-isoprene block copolymer system, styrene-butadiene block copolymer system,
Examples thereof include styrene-ethylene-butylene block copolymer system and ethylene-vinyl acetate copolymer system (above, hot melt system).

The subject S may be a monochrome subject, a color subject, or a mirror subject. 1) Monochromatic subject, color subject When a monochromatic subject S is used, color reproducibility is determined from the wavelength of the laser used for photographing, the reflectance of the subject S, and the sensitivity of the hologram recording photosensitive material to be recorded. The same applies to color subjects. However, when the reflectance of the subject S is low, the intensity ratio (RO ratio) between the reference light and the object light is deteriorated, which makes it unsuitable for hologram photography. Preferably,
The reflectance for each wavelength is 3% to 100%, particularly preferably 20% to 100%. Especially when recording in color
The relationship between the light source used, the subject reflectance, and the sensitivity of the hologram recording photosensitive material becomes important. The details are described below.
There is a subject S consisting of three colors of R, G and B.
It is assumed that multiple recording is performed using three laser beams of 7 nm, 532 nm, and 477 nm. The reflection intensity of the subject S is as follows.

647 nm 532 nm 477 nm R portion 40% 4% 4% G portion 10% 20% 4% B portion 4% 4% 20% In this case, if the laser as the recording light is 647 nm, it is 40% for the R portion. Reflectance, G part is 1
0%, B part is 4%. Therefore, the desired R
In addition to the portion, the G portion and the B portion may be recorded although the RO ratio is poor. This causes crosstalk in any area and causes deterioration of color reproducibility. Therefore, ideally, the reflectance other than the recording laser wavelength is 0%.
It is preferred that However, in reality, since there is a threshold value, if the threshold value or less is acceptable.
The RO ratio is most preferably 1: 1. Therefore, the ideal value of the reflectance of a color subject is as follows.

647 nm 532 nm 477 nm R part 100% 0% 0% G part 0% 100% 0% B part 0% 0% 100% Conversely, the reflectance of the subject S is used to control the color of the hologram recorded. It is also possible to do so. Further, by selecting the laser to be recorded and controlling the diffraction efficiency of each color, a full-color hologram having an intermediate color can be produced.

Furthermore, it is particularly important that an optical system as shown in FIG. 19, which will be described later, is used to form multiplexed light having two or three wavelengths, and the subject S is illuminated with the illumination light. In the case of recording a multi-wavelength multiple color Lippmann hologram, and when attempting to widen the half-value width of the diffraction wavelength by performing color tuning described later after recording the hologram, the center wavelength also usually shifts to the longer side.
In that case, the final hologram color is determined from the wavelength of the laser used for photographing, the reflectance of the subject S, the sensitivity of the hologram recording photosensitive material to be recorded, and the wavelength shift and wavelength spread due to color tuning. Therefore,
From the color to be reproduced and these parameters, the reflectance of the subject S at each wavelength used for shooting is determined.

The subject S may not only be arranged parallel to the protective glass 22 but may be inclined.
In particular, when the illumination light at the time of shooting is not perpendicular to the subject original plate 5, a more sharp hologram can be recorded by inclining the illumination light so that its front face is directed.

2) Mirror subject (this case is referred to as a mirror original plate) A mirror original plate can be produced in the same manner as the subject original plate. As a mirror arranged as the subject S, when a plane mirror is parallel to the protective glass 22, it reflects at the same angle as the incident light angle to the opposite side (rear surface mirror original plate). When the plane mirror arranged as the subject S is not parallel to the protective glass 22, it reflects on the opposite side at an angle different from the incident light angle (wedge mirror original plate).

Further, various spherical / aspherical mirrors (ellipsoidal surface, paraboloidal surface, hyperboloidal surface, axisymmetric surface, axisymmetric surface (anamorphic surface), etc.) which are coaxial or off-axis are used as a subject S (mirror). It may be enclosed in the original plate 5. By designing the mirror original 5 by appropriately selecting the enclosed mirror, the position, and the angle, it becomes possible to photograph a hologram for reproducing an arbitrary desired wavefront and a hologram having an arbitrary imaging distance and an imaging magnification. .

It should be noted that the surface of the mirror subject S can be colored by applying a paint containing a dye or a pigment to make the subject S more varied. Also in this case, as described above, when finally performing color tuning of the multi-wavelength multiple color Lippmann hologram, the color to be reproduced,
The reflectance of the subject S at each wavelength used for photographing is determined from the reflectance of the subject S at the wavelength used for photographing, the sensitivity of the hologram recording photosensitive material to be recorded, the wavelength shift due to color tuning, and the spread of the wavelength.

Next, a method of photographing a Lippmann type hologram (Denishuku hologram) using the hologram photographing object master plate 5 as shown in FIG. 1 will be described with reference to FIG. When the photosensitive material film 1 is directly attached to the protective glass 22 side of the subject original plate 5 and the laser light 7 is irradiated from the photosensitive material film 1 side, the laser light 7 transmitted through the photosensitive material film 1 illuminates the subject S, and the subject S Scattered light from S (reflected light when subject S is a mirror)
8 (object light) interferes with the laser light 7 (reference light) incident on the photosensitive material film 1 in the photosensitive material film 1 to form an interference fringe, and is recorded in the photosensitive material film 1 as a Lippmann hologram. This is the hologram photographing method using the hologram photographing subject original plate 5. This method is similar to the conventional method of replicating a hologram master plate, and a large number of identical holograms can be continuously and easily and stably photographed. Further, various holograms relating to the same subject S can be easily and stably photographed even if the direction and wavelength of the laser light 7 constituting the reference light are changed.

By using various materials such as a reflecting mirror, a scattering plate, a coloring plate and a pattern plate instead of the substrate glass 21 of the subject original plate 5, it is possible to record a hologram rich in design and artistry. it can. Further, instead of the substrate glass 21, by using a relief type hologram in which a three-dimensional object is recorded, a hologram of a three-dimensional image in which the three-dimensional object reproduced from the hologram and the subject S are three-dimensionally superposed is produced. You can also do it.

When a large number of holograms are continuously produced by adopting the same method as the conventional hologram duplication method, the photosensitive material film 1 is satisfactorily adhered to and separated from the original plate 5, and the adhesion is also improved. It is necessary to solve the problems caused by the use of liquid and the problems caused by the inclusion of dust at the adhesion interface. Therefore, in the present application, the method and system proposed in Japanese Patent Application No. 6-171261 by the present applicant will be adopted. The details will be described below.

As described above, in order to photograph a Lippmann type hologram using the hologram photographing object master plate 5 as shown in FIG. 1, as shown in FIG. 2A, the photosensitive material film 1 is used as the object master plate 5. The optical contact liquid 6 having a substantially equal refractive index is placed on the upper surface of the photosensitive material film 1 to bring it into close contact.
The laser light 7 is incident from the side, and the light 7 and the scattered light 8 from the original plate 5 are caused to interfere with each other in the light-sensitive material film 1 that is in close contact, but the light-sensitive material film made of a photopolymer or the like for hologram recording is used. 1 usually has a three-layer structure of support film 3 / photosensitive material 2 / support film 4, and if minute dust 9 is mixed in during adhesion, dust 9
Recording defects occur due to the flow of the optical contact liquid 6 around the vicinity and the lifting of the film 1 due to dust 9.

Then, the support film 3 on the original plate 5 side is peeled off to expose the photosensitive material layer 2 which is a viscoelastic body, and FIG.
As shown in (b), by laminating the photosensitive material layer 2 directly on the original plate 5, it is possible to embed dust particles 9 and the like in the layer 2 and suppress the occurrence of recording defects.

Of course, at this time, the support films 3, 4
It is desirable to remove the dust particles, etc. on the surface with an adhesive roller, etc. Also, in order to suppress the adsorption of dust particles, etc. due to the static electricity generated when the support film 3 is peeled off, a static electricity removing device (such as ion wind blowing, corona discharge, etc.) ) Is desirable.

By the way, when the photosensitive material film 1 from which the one support film 3 has been peeled off as described above is directly stuck on the original plate 5, since the inclusion of bubbles or the like directly causes a recording defect, the photosensitive material film 1 is rolled by a roller. While squeezing from the top, bring them into close contact. As shown in FIG. 3B, the diameter of the roller 10 and the path of the film to be pressure-bonded are smaller than those of the system shown in FIG. 3A, and the winding angle θ of the film 1 and A system in which the contact angle θ ′ between the subject original plate 5 and the film 1 is large is preferable.
That is, the diameter of the roller 10 is preferably 100 mmφ or less, and more preferably about 50 mmφ. At that time, since the roller 10 may be bent, it is preferable to apply pressure from above with a roller having a large diameter. Also, the winding angle θ of the film 1 is 90 °
The above is desirable, and the pressing pressure of the roller 10 is 0.1 kgf.
/ Cm ² or more, the tension of the film 1 is 0.1 kgf / cm or more, and the pressing pressure of the roller 10 and the tension of the film 1 are preferably large. In FIG. 3, the roller 10
The reason why the contact with the subject original plate 5 is flat is that the roller 10 is pressed and crushed.

Now, as described above, in order to prevent the inclusion of air bubbles when the photosensitive material film 1 from which the support film 3 has been peeled off is directly stuck to the original plate 5, the roller 10 is used.
When the photosensitive material film 1 is sequentially adhered while being squeezed from above, as shown in FIG. 4A, when the photosensitive material film 1 is adhered to the entire surface of the original plate 5, the photosensitive material film 1 corresponding to the edge 5 ′ of the original plate 5 is exposed. The force is concentrated on the position of the material film 1 to cause scratches, which is not preferable. Therefore, as shown in FIG. 2B, the photosensitive material film 1 is formed on the original plate 5 only in the central region avoiding the edge 5 ′ as described above, not on the entire surface of the original plate 5.
While squeezing, make it adhere. Then, as shown in FIG. 3B, the photosensitive material film 1 at both ends in the ironing direction of the roller 10 is lifted from the original plate 5 and held at a minute angle α with respect to the surface thereof. When the light-sensitive material film 1 and the original plate 5 are attached to each other in this manner, bubbles and the like are not introduced, and the position corresponding to the edge 5'of the original plate 5 is not scratched. The angle α is the adhesive force F of the photosensitive material layer 2 of the photosensitive material film 1 to the original plate 5.
And the tension f of the photosensitive material film 1, α <sin
^-1 (f / F), but normally, when set in the range of 2 to 10 °, the photosensitive material film 1 is not scratched, and
The photosensitive material film 1 will not be peeled off from the original 5 during photographing of the original 5.

When the original 5 is photographed by irradiating it with laser light, it is desirable to use non-reflection coated glass or the like for the purpose of removing noise such as back reflection of incident light. In this case, as shown in the layer structure in FIG. 5, the antireflection coating glass 11, the optical contact liquid 12, the support film 4, the photosensitive material 2, the subject original plate 5 from the laser light 7 incident side.
It is desirable to perform imaging in the order of the layer structure. Here, as the support film 4, a light absorbing film or a non-reflection coating film may be used.

Further, prior to photographing with the laser beam 7, the trimming process (which should be photographed) is performed by irradiating ionizing radiation such as ultraviolet light that sensitizes the photosensitive material 2 to the outside of the region of the photosensitive material 2 to be photographed. It is desirable to add an ionizing radiation masking device for sufficiently exposing the outside of the region and losing the photosensitivity by the laser beam 7. Specifically, as shown in FIG. 6A, the trimming mask 14 is brought into close contact with the photosensitive material film 1 and exposed by ultraviolet light 15, and the trimming mask 14 is exposed as shown in FIG. 6B. There is a projection exposure in which is separated from the photosensitive material film 1 and projected by divergent light 17 from the ultraviolet light source 16, etc., but there is a space for the pressure bonding roller 10 (FIG. 3) and the antireflection coated glass 11 (FIG. 5). The photosensitive material film 1
The projection exposure is more advantageous because it is prepared above.

After the hologram recording with the laser beam 7 as described above, when the recording film 1 is peeled off from the original plate 5, an ionizing radiation exposure irradiation device for reducing the tackiness of the recording film 1 is required. This can be achieved by removing the trimming mask 14 from the ionizing radiation masking device in the previous step and using only the ultraviolet light 15 or 17. In addition, since the adhesiveness of the original plate 5 itself is also reduced,
It is desirable that the surface of the original 5 on which the recording film 1 is adhered is previously subjected to a release treatment with a fluorine-based release agent, a silicone-based release agent, or the like.

By the way, as a method of peeling the recording film 1 from the original plate 5, if one end of the recording film 1 is simply pulled up, a peeling speed difference occurs in the plane, and the peeling stops at a slow position or along the peeling front line. Peeling unevenness such as streaks occurs, and a defect is generated in the recording with a good bending angle. That is, as shown in FIG. 7 (a), when the recording film 1 is pulled up from one end to the upper side, it is rapidly peeled to the position shown in the figure, the peeling is once stopped at that position, and then, this time, as shown in FIG. Is rapidly peeled to the position. If such non-continuous peeling is performed, streaks are formed on the recording film 1 at the positions of and in this case. In order to suppress this, as shown in FIG. 7B, it is desirable to sequentially peel the recording film 1 while pressing the recording film 1 with the roller 18 as in the pressure bonding (FIG. 3). Also in this case, the diameter of the roller 18 is preferably small, and the roller 10 used at the time of pressure bonding
May be used as the peeling roller 18 in reverse rotation.

Since the surface of the photosensitive material 2 of the recording film 1 thus peeled off is exposed, it is necessary to attach a protective sheet to the surface of the photosensitive material 2 in order to wind it. For that purpose, as shown in FIG. 7 (b), the protective film 20 having an adhesive layer or an adhesive layer on one surface is peeled off via the roller 19 which rotates in the opposite direction to the roller 18, and the adhesive layer or the adhesive layer is attached to the recording film 1. Make sure that the layers are pasted together. In this case, after adhering the protective film 20 to the recording film 1, ionizing radiation treatment may be required to increase the adhesive force, and in such a case, it is necessary to provide an ionizing radiation irradiation device. In addition, by making the protective film 20 highly releasable,
The recording film 1 can be a seal type.

By the way, in order to photograph the original plate 5, a long film is usually used as the film 1, and this film is intermittently sent onto the original plate 5 by the length of one frame plus the distance between frames. While making multiple periodic recordings. That is, as shown in FIG. 8, in the recording film 1, the hologram recording area A having the dimension a in the film longitudinal direction is provided with the inter-frame spacing b.
It will be taken periodically. When the original 5 is photographed by such intermittent feeding, the film 1 before and after exposure is usually conveyed by some nip roller (roller pair).
Is stopped, and during that time, the roller pressure is continuously applied to the nip roller stop position of the film 1 to form a streak-shaped recess. It is not preferable that the recesses are formed at a position corresponding to the hologram area A, which causes scratches.

Therefore, as shown in FIG. 9, all the distances x and x ′ along the film path from the center line of the original plate 5 of the nip rollers R and R ′ before and after exposure satisfy the following relations. If the positions of the nip rollers R and R ′ are set, the streak-like depressions due to the stop of the feeding of the film 1 during shooting will be located at the inter-frame interval between the hologram areas A, and when the hologram area A is cut out. There will be no adverse effects on the product. It should be understood that the above-mentioned inter-frame spacing b should be selected so as to be larger than the nip width of the nip rollers R and R ′ (width of the streak-shaped recess). n (a + b) + a / 2 <x, x '<n (a + b) + a /
2 + b where n is zero or a positive integer.

By the way, as shown in FIG. 5, in order to remove noise such as back reflection of incident light, no reflection occurs on the incident side of the laser light 7 of the film 1 through an optical contact liquid (refractive index matching liquid) 12. The coated glass 11 is brought into close contact. When the refractive index matching liquid 12 spreads in the longitudinal direction of the film 1 and advances in the film feeding direction while being adhered, the refractive index matching liquid 12 is usually a solvent-based one such as xylene, isoper, and Cargel standard refractive liquid. Since it is used, NBR material, I
Since it is transferred to a conveyance roller made of a material such as an IR rubber-based material, a change in its shape, a change in dimension, a change in hardness is caused, and a defect such as a nip mark remaining on the film 1 occurs. Must be prevented. Also,
If such a refractive index matching liquid 12 wraps around the photosensitive material layer 2 on the back surface of the film 1, the photosensitive material 2 is damaged, and this must be similarly prevented.

In order to prevent these, as shown in FIG. 10A, a sectional view taken along the film advancing direction, FIG. 10B is a sectional view taken along the transverse direction of the film, and FIG. 10C is a plan view. Before pressing the non-reflective coated glass 11 onto the film 1, first, on the film 1 that is in close contact with the original 5 outside the effective recording area in the vicinity of both ends of the original 5, the refractive index matching liquid 12 that spreads in the film advancing direction is applied. Lightly press the stopping barrier members 60, 60. Further, in order to prevent the refractive index matching liquid 12 from wrapping around the photosensitive material layer 2 on the close contact side of the film 1, grooves 61, 61 are provided on the surface of the original plate 5 along both side surfaces in the film advancing direction. 5 both sides and grooves 61, 6
The bank portions 62, 62 are formed between the film 1 and the film 1
Both side edges of the bank are located on the bank portions 62, 62.
In this way, even if the refractive index matching liquid 12 dropped from the refractive index matching liquid supply pipe 63 overflows and tries to get around the photosensitive material layer 2 of the film 1, it is blocked by the bank portion 62 and even if it gets over it. , It does not reach the photosensitive material 2 in the effective recording area, and does not damage the photosensitive material 2.

Incidentally, the refractive index matching liquid 1 in the film advancing direction
For the barrier members 60, 60 that stop the spread of 2
When the film 1 outside the effective recording area is inclined upward as shown in FIG. 4B, it can be omitted.

By the way, in order to drop the refractive index matching liquid 12 on the film 1 having the measures for preventing the spreading and the wraparound of the refractive index matching liquid 12 as shown clearly in FIG. For example, if a refractive index matching liquid supply pipe 63 that has two or more tips and is capable of dropping the refractive index matching liquid 12 from a plurality of holes at the same time is used, the dropping time is shortened and the refractive index matching liquid 12 is uniformly distributed. It is desirable because it can be dropped.

Next, after recording the original 5, the antireflection coating glass 11 was removed from the film 1 and the film 1 was left as it was.
When the film is wound up, the remaining refractive index matching liquid 12 damages the conveying roller in the same manner as described above, ruining the photosensitive material 2, and it is not desirable that the liquid refractive index matching liquid 12 adheres as a product. . Further, it is necessary to prevent the refractive index matching liquid 12 from adhering to the antireflection coated glass 11 separated upward from the film 1 and dropping onto the original plate 5 or to an undesired position on the film 1. .
Therefore, first, the film 1 adhesion surface of the antireflection coated glass 11 is previously subjected to a water repellent treatment with a fluorine-based water repellent treatment agent, a silicone-based water repellent treatment agent, or the like.

Then, the index matching liquid 12 remaining on the film 1 is wiped with a squeegee (wiper) 64 formed in a concave (bow-shaped) curved shape in the direction of the wipe as shown by the arrow, as shown in FIG. It is desirable to take it. Alternatively, a sponge may be contacted and absorbed, or may be scraped off with an air doctor. Then, it is desirable to further dry the remaining refractive index matching liquid 12.

Hereinafter, one specific example of the system for implementing the above-mentioned hologram photographing method will be described. FIG. 12 (a)
The subject original plate 35 as shown in FIG. 1 is incorporated in the hologram recording apparatus as shown in FIG. In this apparatus, as a photosensitive material film 1 for photographing, as shown in the cross section of FIG. 1B, a support film 3 / a photosensitive material 2 / a support film 4
The Omnidex-706 holographic recording film having a three-layer structure is used. Further, as the protective film 50, as shown in the cross section of FIG.
T (polyethylene terephthalate) 51/1 μm thick optical adhesive (NOA-61 manufactured by Norland, USA) 52/50
A protective film made of PET53 having a thickness of μm is used.

The structure of this device will be described together with its operation.
First, the film 1 sent out from the unwinding roller 31 on which the photosensitive material film 1 for photographing is set is cleaned through a cleaning unit 44 composed of an adhesive roller, and one side is peeled by a peeling roller 45 in a sticking / peeling head 32. The support film 3 is peeled off. The peeled support film 3 is wound by the winding roller 33. On the other hand, the exposed film 1 on the surface of the photosensitive material 2
Is laminated on the central region of the original plate 35 by moving the sticking / peeling head 32 from the right to the left in the drawing and moving the object original plate 35 up and down as described later. At this time, the stopping position of the sticking / peeling head 32 and the raising of the subject original plate 35 are adjusted so that the lifting angle α (FIG. 4B) at both ends of the original plate 35 of the photosensitive material film 1 becomes about 2 to 10 °. The descending timing and the position of the guide roller 37 are set.

Next, on the original plate 35 laminated with the film 1, barrier members 60, 60 as shown in FIG. 10 are inserted laterally above the original plate 35, and an effective recording area is provided near both ends of the original plate 35 (5). Gently press it onto the film 1 that is in close contact with the outside. Then, as shown in FIG. 10C, for example, from the side, a refractive index matching liquid supply pipe 63 having two or more branched ends and capable of dropping the refractive index matching liquid (index matching liquid) simultaneously from a plurality of holes is provided. Insert it above the original plate 35, drop an appropriate amount of xylene as a refractive index matching liquid on the film 1 attached to the original plate 35, and then evacuate the refractive index matching liquid supply pipe 63, then carefully take care not to entrap bubbles. A non-reflective coating glass 34 (11) is put on it. How to cover the anti-reflection coated glass 34 will be described in more detail later. The surface of the non-reflective coated glass 34 that comes into contact with the refractive index matching liquid has been previously subjected to water repellent treatment with a fluorine-based water repellent treatment agent, a silicone-based water repellent treatment agent, or the like.

Thereafter, the ultraviolet light 48 from an ultrahigh pressure mercury lamp (not shown) is projected and exposed through the chrome trimming mask 36 to shield only the central portion of the laminated area of the photosensitive material 2 and 30 mJ / cm 2 in the surrounding area.
Exposure is performed with the amount of ² to lose the photosensitivity, and trimming (masking) is performed.

Next, Ar laser light 47 is irradiated onto the original plate 35 from the film 1 side (irradiation amount: 30 mJ / cm ² ) to photograph the subject. After the exposure, the non-reflection coated glass 34 is peeled from the film 1, and a squeegee (wiper) 64 curved in a concave (bow) shape in the direction of the arrow shown in FIG. 1
The index matching liquid is cleaned by gently pressing it upward and wiping in the direction of the arrow, and the remaining index matching liquid is dried with heated air.

Next, the sticking / peeling head 32, which will be described later, is moved from the left side to the right side of the drawing, and the object original plate 3 is moved.
The recording film 1 is peeled off by the ascent and descent of 5, and the film 1 is fed by a length corresponding to a frame interval of adding one frame. At that time, the adhesive layer 52 is formed on the side of the photosensitive material 2 side of the recording film 1.
The attached protective film 50 is attached by the laminating roller 38. At this time, the cover sheet 51 of the protective film 50 (50 μm thick P
ET) is peeled off by the peeling roller 39 and wound up by the winding roller 41.

The recording film 1 with the protective film 50 attached thereto enters the ultraviolet irradiator 42, is exposed to the ultraviolet light from the ultra-high pressure mercury lamp in an amount of 100 mJ / cm ² , and is then wound around the winding roller 43. An antistatic device is attached at each position in order to remove static electricity generated by the peeling rollers 45 and 39.

The nip rollers 45 and 38 described above are used.
Distance from the center line of the original plate 35 along the path of film 1 x
Are set to satisfy the relationship of n (a + b) + a / 2 <x <n (a + b) + a / 2 + b according to the relationship of FIG. Here, a is the dimension (the size of one frame) of the hologram recording area formed by one shooting in the film 1 advancing direction, b is the interval between the hologram recording areas in the film 1 advancing direction, and n is zero or positive. Is an integer. In order to satisfy such a relationship, each of the nip rollers 45 and 38 is configured to be positionally adjustable in the direction along the path of the film 1.

In such an apparatus, the photosensitive material film 1 and the protective film 50 in FIGS.
And the layer structure in the state where they are attached is shown in FIG.
It is like. By peeling off the cover sheet 53 of the final product that has been cut into sheets, it can be adhered to the article as a hologram seal.

Now, referring to FIGS. 13 to 15, the movement of the sticking / peeling head 32 and the subject original plate 35 are performed.
By moving up and down, the recording film 1 can be used as the subject original plate 35.
The operation of laminating on and peeling off will be described in detail. A peeling roller 45 and a common sticking / peeling roller 46 are attached to the sticking / peeling head 32, and the photosensitive material film 1 for photographing is passed through the peeling roller 45 to form a support film 3 and a photosensitive material 2 / support. Film 4 (hereafter
It's called a film. ) And the film is guided to the guide roller 37 via the roller 46 for both sticking and peeling. The film between the sticking / peeling roller 46 and the guide roller 37 is laminated on the master 35, photographed and recorded, and peeled from the master 35. The sticking / peeling head 32 is provided with a head left / right moving mechanism (not shown) that moves the head to the left and right in the drawing.
The subject original plate 35 is mounted on an original plate vertical movement mechanism (not shown).

First, as shown in FIG. 13A, the original plate 3
In order to laminate the film on 5, the original plate 35 is placed in the lowered position, and the sticking / peeling head 32 is moved to the upper right side outside the original plate 35.

Then, as shown in FIG. 13B, the film 1 and the film are fixed (unwinding roller 31,
With the take-up roller 43 fixed, attach it.
The sticking / peeling head 32 is moved to the left side until the common peeling roller 46 reaches the position where the right edge of the original plate 35 has passed. At that time, the support film 3 is wound at a speed twice as fast as the moving speed of the sticking / peeling head 32.

Then, as shown in FIG. 13 (3), the original plate 35 is raised and attached in a state where the common sticking / peeling roller 46 passes over the right edge of the original plate 35 and is positioned above the original plate 35. It is pressed against the peeling common roller 46. Then, the sticking / peeling head 32 is continuously moved to the left while the common sticking / peeling roller 46 is pressed, and the laminating of the film on the original plate 35 is started.

As shown in FIG. 13 (4), the sticking / peeling head 32 is moved to the left until just before the sticking / peeling common roller 46 reaches the left edge of the master 35 to laminate the film on the master 35. Complete.

After that, as shown in FIG. 14 (5), with the common sticking / peeling roller 46 in the position immediately before the left edge of the original plate 35, the original plate 35 is lowered to set the common sticking / peeling roller 46 to the original plate. Separate from 35.

After that, as shown in FIG. 14 (6), the sticking / peeling head 32 is moved further to the left side so that the sticking / peeling head 32 comes to the upper left of the original plate 35, and at that position. The movement of the sticking / peeling head 32 is stopped. In this state, the film is
As shown in (b), the film is laminated not only on the entire surface of the original plate 35 but only in the central region avoiding both ends, and the film not adhered at both ends is lifted from the original plate 35 to form a minute angle α with respect to the surface thereof. It is held as if it were eggplant. This angle α is set to about 2 to 10 ° as described above.

Next, as shown in FIG. 14 (7), as described above, the non-reflection coated glass 34 is covered with the index matching liquid, trimming is performed, and the original plate 35 is photographed and exposed. Is peeled off, and the index matching liquid is cleaned and dried.

Then, this time, the film is peeled from the original plate 35 through the steps reverse to the above (1) to (6). That is, as shown in FIG. 14 (8), the sticking / peeling head 32 is moved to the right side, and the common sticking / peeling roller 46 passes through the left edge of the original plate 35 and is positioned above the original plate 35. Come on. At this time, with the film 1 and the film fixed, the support film 3 is sent out at a speed twice the moving speed of the sticking / peeling head 32.

Next, as shown in FIG. 14 (9), the original plate 35 is raised in this state and pressed against the common sticking / peeling roller 46. Then, the sticking / peeling head 32 is continuously moved to the right while the common sticking / peeling roller 46 is pressed, and the peeling of the film from the original plate 35 is started.

As shown in FIG. 15 (10), paste /
The sticking / peeling head 32 is moved to the right until just before the peeling common roller 46 reaches the right edge of the original plate 35, and the peeling of the film from the original plate 35 is completed.

Next, as shown in FIG. 15 (11), with the common sticking / peeling roller 46 at the position immediately before the right edge of the original plate 35, the original plate 35 is lowered to set the common sticking / peeling roller 46 to the original plate. Separate from 35.

Finally, as shown in FIG. 15 (12), the sticking / peeling head 32 is moved further to the right side so that the sticking / peeling head 32 comes to the upper right of the original plate 35, and its position. Then, the movement of the sticking / peeling head 32 is stopped. Then, in this state, the film 1 is sent out from the unwinding roller 31 by one frame and the size of the interval between the frames ((a + b) in FIG. 8), and the film 3 and the film are wound by the winding rollers 33 and 43 at the same distance. take. Then, returning to the step of FIG. 13A, the next photographing is performed.

The above is the description of the process of laminating the photosensitive material film 1 on the subject original plate 35 and peeling it off.
Next, as to a method of dropping the refractive index matching liquid on the film 1 attached to the original plate 35 and covering the film with the antireflection coating glass 34 so as not to entrap the bubbles, FIG.
This will be described in detail with reference to FIG.

As shown in FIG. 16A, a non-reflection coated glass vertical movement mechanism 66 for moving the non-reflection coated glass 34 up and down is attached. In particular,
In the case of the figure, rods 67 that can be independently moved up and down by air cylinders are attached to the four corners of the antireflection coated glass 34 via universal joints 68. The photosensitive material film 1 for photography (strictly speaking, as shown in FIG.
When laminating the film 1) in the state of (b), the antireflection coating glass vertical movement mechanism 66 is retracted from the original plate 35, and when the lamination of the film 1 is completed, the antireflection coating glass vertical movement mechanism 66 is moved. Original 35
Move on the plane. In this state, anti-reflection coated glass 34
Are held in the raised position. Then, the refractive index matching liquid supply pipe 63 is inserted laterally above the original plate 35, and the refractive index matching liquid 1
An appropriate amount of 2 is dropped on the surface of the film 1 attached to the original plate 35, and then the refractive index matching liquid supply pipe 63 is retracted.

Next, as shown in FIG. 16 (2), the non-reflective coated glass vertical movement mechanism 66 is operated, and first, only one corner of the non-reflective coated glass 34 is contacted with the laminated film 1. The reflection coated glass 34 is slowly lowered. At this time, the above refractive index matching liquid is dripped at this position. This is to prevent air bubbles from being caught in the refractive index matching liquid 12 when the entire non-reflection coated glass 34 descends at one time, resulting in a photographic recording defect.

Next, as shown in FIG. 17C, another adjacent corner of the antireflection coating glass 34 is slowly lowered so that the contact changes from one-point contact to one-side contact.

Then, as shown in FIG. 17 (4), one of the remaining two non-contacting corners is slowly lowered so as to spread the refractive index matching liquid 12 in the width direction of the film 1 and contact it. Let At this time, the anti-reflection coated glass 34
Will bend three-dimensionally, but the amount of strain is sufficient if it is a slight amount within the range allowed by the elasticity of the antireflection coated glass 34 and its supporting frame. Specifically, 300 mm x 40
The amount of deflection is 1 with 0 mm x 5 mm non-reflective coated glass 34
About 2 mm.

Finally, as shown in FIG. 17 (5), the remaining one corner is brought into contact, and the original plate / photosensitive material film / refractive index matching liquid / non-reflection coated glass are laminated in this order without enclosing air bubbles. To complete the laminated body for photographic exposure.

By using the hologram recording apparatus having the above-mentioned structure, recording defects due to foreign matters such as dust and bubbles can be prevented, and good holograms without peeling unevenness can be continuously and efficiently produced. .

In order to perform multiple recording using the three laser beams from the subject original plate 35, in the arrangement of FIG.
The wavelengths of the laser light 47 may be changed in order at the time of photographing, or light of different wavelengths may be simultaneously applied to the original plate 35 from the film 1 side.

By the way, in the case of the arrangement shown in FIG. 12, the objects constituting one scene are arranged in the object original plate 35, and the hologram areas A (FIG. 8) are sequentially formed on the photosensitive material film 1 one by one. As an example, as shown in FIG. 18, there are a plurality of subjects S1 to S1 as the subject original plate 35.
It is also possible to use those arranged in parallel in S4, and to simultaneously record multiple frames corresponding to the number of frames (hologram area A) in one shot at the same time. In that case, as the laser light 47 for illuminating the original plate 35, a beam with a large cross section that covers all of the plurality of subjects S1 to S4 may be used, but in that case, the light intensity at the center is strong and each hologram area A is Since uniform exposure is difficult to perform, it is desirable to use laser beams 471 to 474 divided according to the number of impositions and to illuminate each hologram area A with different laser beams 471 to 474.

FIG. 19 shows a case in which such a plurality of illuminating laser beams 471 to 474 are formed by multiple lights from lasers of three wavelengths, respectively, and used for recording a full-color three-primary-color Lippmann hologram with multiple faces. It is an optical-path figure which shows an example of an illumination optical system, and uses the laser of three wavelengths. That is, the Kr laser 71 is used as the R light source.
(647 nm) as a light source for G, a dye laser 72 (550 nm) using an Ar laser 74 as an excitation laser.
Using an Ar laser 73 (477 nm) as a B light source, and synthesizing laser beams from these laser beams through variable beam splitters 75 to 77 and then into one optical path, a total reflection mirror 78 and a dichroic mirror 79, 80 is used. In the case of the arrangement shown in the figure, the dichroic mirror 79 is a red narrow band mirror having a non-reflective coating on its back surface, and the dichroic mirror 80 is a mirror having a non-reflective coating on its back surface and selectively transmitting only light having a wavelength of 500 nm or more. But lasers 71-73
The arrangement of is not limited to that shown in the figure, and can be changed. In that case, the total reflection mirror 78, the dichroic mirror 79,
The arrangement of 80 and the reflection band need to be changed. In addition,
Reference numeral 81 in the drawing is a light shielding plate for absorbing unnecessary light divided by the variable beam splitters 75 to 77 and preventing it from becoming stray light.

The light combined into one optical path by the dichroic mirrors 79 and 80 is reflected by the total reflection mirror 82 and then split into two by the beam splitter 83, and the respective lights are further split by the beam splitters 84 and 85. 2 more
The light is divided into four, and a total of four lights pass through the spatial filters 89 to 92 to become laser lights 471 to 474 which illuminate the regions of the respective subjects S1 to S4. The total reflection mirrors 86 to 88 are for guiding the divided lights to predetermined positions.

In the case of FIG. 12, in order to protect the photosensitive material 2 of the recording film 1 peeled from the original plate 35, FIG.
A protective film 50 whose cross section is shown in 2 (b) is used, and the cover sheet 51 is peeled off and attached to the photosensitive material 2 with an adhesive layer 52, and the cover sheet 53 is made of PET.
The cover sheet 53 was peeled off in the final product to adhere to the article as a hologram seal. Instead of this, a protective film 5 having a layer structure as shown in FIG.
0 'can also be used. That is, FIG. 12 (b)
A 5-layer structure is used instead of the 3-layer structure. In FIG. 20, reference numerals 51 and 53 denote cover sheets made of PET or the like, as in the case of FIG. 12B, and a black sheet 54 made of PET or the like is sandwiched between them by adhesive layers 55 and 56. ing. Therefore, when such a protective film 50 'is used, the cover sheet 51 is peeled off by the peeling roller 39, and the lamination is applied to the photosensitive material 2 side of the recording film 1 peeled from the original plate 35 by the laminating roller 38. At the position of a), the hologram recording film 1 having the protective film 50 ′ having a cross section as shown in FIG. 21 is obtained, which is exposed to the ultraviolet light by the ultraviolet irradiator 42 and then wound on the winding roller 43. To be

As described above, when the black sheet 54 is arranged on the lower side of the hologram layer 2, the background of the hologram becomes black, and when the hologram is used as a sticker or the like, the recorded image can be clearly seen and displayed. The effect increases. Also, instead of the black sheet 54, various colored sheets,
If a sheet with a pattern (for example, screen tone) is used, the design effect is further enhanced. It should be noted that the same effect can be obtained to some extent even if the adhesive layer 52 itself is black or colored instead of the intermediate sheet. Further, the intermediate sheet or the colored adhesive layer 52 has a certain degree of see-through property and gives a sense of depth and looks three-dimensional.

By the way, when the recording film 1 is irradiated with ultraviolet light by the ultraviolet irradiator 42 as a post-treatment, the adhesive force of the support film 4 to the photosensitive material 2 is reduced, and the state of FIG. In the state of 21, the support film 4 is easily peeled off. For example, recording film 1
When used as a transfer seal as described later as the final product, it is not preferable that the support film 4 is easily peeled off. Therefore, in such a case, the support film 4
It is desirable that the protective sheet be peeled off and a separately prepared protective sheet be attached instead. FIG. 22 is a cross-sectional view of such a protective sheet, which includes a protective sheet 101, an adhesive layer 103, and a cover sheet 102. The cover sheet 102 is peeled off, and the support film 4 is formed on the surface of the adhesive layer 103.
The protective sheet 101 is attached to the surface of the photosensitive material 2 from which the is removed. In this case, after the protective sheet 101 is replaced, heat treatment is performed if necessary. The protective sheet 101 is not limited to a transparent one, and various colored sheets, sheets with pictures, etc. are preferably used in order to improve the design. In addition, a sheet of a hard coat material may be used to further enhance the protective function.

In FIG. 23, the lower side of the photosensitive material 2 is shown in FIG.
22 shows the overall layer structure of the hologram recording film 1 when it is protected by the protective film 50 ', the support film 4 on the upper side of the photosensitive material 2 is peeled off, and is protected by the protective sheet 101 in FIG. . Such a hologram recording film 1 can be cut into an appropriate size and used as a transfer seal. FIG. 24 shows a state in which the transfer seal 104 having the layer structure of FIG. 23 is attached to the surface of various base materials 105 such as books, pamphlets, cards and the like, and the cover sheet 53 is peeled from the adhesive layer 56 as a release paper. Then, the adhesive layer 56 is applied to the surface of the base material 105 such as a book, a pamphlet, or a card.

In the hologram manufacturing method described above, the laser beams 7 and 47 are interfered with the scattered light 8 from the original plates 5 and 35 in the photosensitive material 2 to record a reflection type Lippmann hologram, and a transfer seal or the like is recorded. Although I was thinking about making it into a final product, the diffraction wavelength characteristics of such holograms are narrow. Therefore, next, consideration will be given to adopting a color tuning method for the hologram after interference recording to widen the half-value width of the diffraction wavelength to obtain a brighter hologram.

In color tuning, a color tuning film is brought into close contact with a photosensitive material 2 such as a photopolymer on which a hologram is recorded and heated to diffuse a monomer, a plasticizer, etc. in the photosensitive material 2 to thereby obtain a wide diffraction wavelength range. Since the half-value width of the diffraction wavelength increases, illuminating the Lippmann hologram after color tuning with white light increases the diffracted light and improves the brightness. .

Therefore, in the present invention, for example, FIG.
A color tuning film having substantially the same layer structure is used instead of the protective film 50 of FIG.
In that case, layer 52 would be a color tuning film layer instead of an adhesive layer. Alternatively, in the cross-section of FIG. 12, a color tuning film layer further laminated on the exposed surface of the adhesive layer 52 may be attached to the photosensitive material 2. And the ultraviolet irradiator 42
Place a heating device upstream of the. It should be noted that the photosensitive material 2 may be irradiated with ultraviolet rays even before the color tuning film is attached to reduce the disturbance of the interference fringes due to the color tuning. With such a configuration change, the full width at half maximum of the diffraction wavelength of the hologram recorded in the photosensitive material 2 can be widened to make it a bright hologram. The center diffraction wavelength usually shifts to the long wavelength side (sometimes to the short wavelength side).
Therefore, as described above, when the subject original plate 5 is manufactured, the desired color reproducibility cannot be obtained unless the subject S is colored in consideration of the wavelength shift. This is particularly important when producing a full-color Lippmann hologram of three primary colors. If a paint of a color having a central wavelength that compensates for the wavelength shift at the central wavelength of each primary color is used for each primary color. It will be good.

Next, a specific example of a hologram obtained by producing a hologram with the arrangement as shown in FIG. 12 and performing color tuning by making the above changes will be described. Nickel plating is applied to the patterned aluminum plate, and further colored with blue paint (Tamiya Model Co., Ltd. enamel paint clear blue, X-23) and green paint (Tamiya Model Co., Ltd. enamel paint clear green, X-25). did. These colored aluminum plates were enclosed in a box made of a glass plate with a transparent silicone filler to prepare a hologram master object master plate. Using this as the subject master plate, the PVC film of the hologram photosensitive material (DuPont: Omnidex 706 photosensitive layer thickness 20 μm) with a PVC film on one side and a PET film on the other side is peeled off, and the peeled surface is the subject master plate. While squeezing the holographic material from the opposite side with a roller, it is attached to the subject original plate, and the wavelength from the hologram material side is 458 nm, 51
Hologram recording was performed by simultaneously illuminating a 4 nm laser beam. Next, the hologram sensitive material attached from the subject original plate is sequentially peeled from one end while pressing it with a roller, and the peeled photosensitive layer shifts the reproduction wavelength to a long wavelength and widens the half-value width. : GA2RED (thickness: 20 μm) is attached, and heat treatment is performed at 140 ° C. for 15 minutes, the central reproduction wavelength shifts to about 80 nm long wavelength side, and each exhibits yellow green and orange colors, and the half-value width broadens to 20 to 30 nm. 4
A hologram having a size of 0 to 50 nm was obtained. The brightness (the area of the diffraction efficiency peak) at this time was about 1.5 times that in the case where color tuning was not performed. What is characteristic here is that the paint to be applied to the subject is selected not by the color of the final hologram but by the color of the laser used for shooting. FIG. 25 is a diagram showing the diffraction efficiencies of the portion corresponding to the blue paint application portion in this case with and without color tuning.

Although it has not been conventionally considered that the wavelength-multiplexed Lippmann hologram as in the present invention is used to broaden the diffraction wavelength by color tuning,
There are the following three methods for distinguishing whether or not color tuning has been performed. The first method is a case where the color tuning film laminated on the hologram recording layer remains as a unit, and in this case, it can be easily discriminated whether or not color tuning is performed.

The second and third methods are methods that can be distinguished even when the color tuning film does not remain integrally. Among them, the second method is to measure the diffraction efficiency spectrum and calculate the theoretical formula of Kogelnik ( "The Bell System Tec
hnical Journal ”48 (9) 1969, pp.2909-2947, especially p.29
It is possible to discriminate that color tuning has not been performed if the fitting is possible with the theoretical formula of the diffraction efficiency of a lossless dielectric grating of 32).
The third method is to observe the hologram cross section with an electron microscope,
When the pitch is gradually expanded or narrowed in the film thickness direction, it is a method to distinguish that color tuning is performed.

The hologram production method and hologram recording body of the present invention have been described above based on some embodiments, but the present invention is not limited to these embodiments and various modifications are possible.

[0097]

As is apparent from the above description, according to the hologram production method of the present invention, the photosensitive material film is brought into close contact with the hologram photographing subject original plate, and light is irradiated from the photosensitive material film side to perform hologram recording. Since it is performed, a large number of the same holograms can be consecutively and easily and stably photographed. Also, peel off the support film on one side of the photosensitive material film, and while squeezing the photosensitive material film with the roller, sequentially attach it to the hologram recording subject master plate on the exposed surface, and after exposure, hold the attached photosensitive material film with the roller Since the peeling is performed sequentially from the beginning, it is possible to manufacture a high-quality hologram that does not entrap air bubbles and the like and does not cause peeling unevenness due to peeling.

The hologram recording material according to the present invention is
It is extremely rich in design and can be used as a transfer sheet or the like.

[Brief description of drawings]

FIG. 1 is a three-view drawing of a hologram photographing object master plate used in the present invention.

FIG. 2 is a diagram for explaining the hologram manufacturing method of the present invention.

FIG. 3 is a diagram for explaining a film laminating method based on the present invention.

FIG. 4 is a diagram for explaining how a laminated film is scratched at an edge of a subject original plate and a method for preventing it.

FIG. 5 is a diagram showing a layer structure at the time of hologram production.

FIG. 6 is a diagram for explaining a trimming processing method in hologram production.

FIG. 7 is a diagram for explaining a film peeling method based on the present invention.

FIG. 8 is a diagram showing an arrangement of hologram recording areas of a film taken.

FIG. 9 is a diagram for explaining the arrangement position of a nip roller before and after exposure.

FIG. 10 is a diagram for explaining a configuration for dropping the refractive index matching liquid on the film and a configuration for preventing the refractive index matching liquid from spreading and flowing around to the back surface.

FIG. 11 is a diagram for explaining a configuration for wiping off a refractive index matching liquid.

FIG. 12 is a diagram showing a configuration of a hologram producing apparatus in one embodiment of the present invention.

FIG. 13 is a partial process chart for explaining a process of laminating / peeling a photosensitive material film from a subject original plate in one example of the present invention.

FIG. 14 is a process drawing of another portion following the process of FIG.

FIG. 15 is a remaining process diagram following the process of FIG. 14;

FIG. 16 is a partial process chart for explaining a method of covering a laminated photosensitive material film with antireflection coated glass.

FIG. 17 is a remaining process diagram following the process of FIG. 16;

FIG. 18 is a three-view drawing of another example of a hologram photographing object master plate used in the present invention.

FIG. 19 is an optical path diagram showing an example of an illumination optical system used in the present invention.

FIG. 20 is a cross-sectional view showing a layer structure of another example of the protective film.

21 is a cross-sectional view showing the layer structure of a hologram recording film to which the protective film of FIG. 20 is attached.

FIG. 22 is a cross-sectional view showing a layer structure of a protective sheet to be attached instead of the support film.

23 is a cross-sectional view showing the layer structure of the hologram recording film protected by the protective film of FIG. 20 and the protective sheet of FIG. 22.

FIG. 24 is a diagram showing a state where a transfer seal having the layer structure of FIG. 23 is attached to a base material.

FIG. 25 is a diagram showing diffraction efficiencies in the case where color tuning of a portion corresponding to the blue paint coating portion of one specific example of the present invention is performed and not performed.

[Explanation of symbols]

 S, S1 to S4 ... Subject A ... Hologram duplication region R, R '... Nip roller 1 ... Photosensitive material film 1 ... Photosensitive material film 2 ... Photosensitive material 3, 4 ... Support film 5 ... Holographic imaging subject original plate 5' ... Edge of original plate 6 ... Optical contact liquid 7 ... Laser light 8 ... Scattered light (reflected light) 9 ... Dust 10 ... Pressing roller 11 ... Non-reflective coated glass 12 ... Optical contact liquid (refractive index matching liquid) 14 ... Trimming mask 15 ... UV light 16 ... UV light source 17 ... diverging light 18 ... peeling roller 19 ... roller 20 ... protective film 21 ... substrate glass 22 ... protective glass 23 ... filler 24 ... protrusion 25 ... taper 31 ... unwinding roller 32 ... pasting -Peeling head 33 ... Winding roller 34 ... Non-reflective coated glass 35 ... Holographic imaging subject master plate 36 ... Chromtrimine Mask 37 ... Guide roller 38 ... Laminating roller 39 ... Peeling roller 40 ... Unwinding roller 41 ... Winding roller 42 ... UV illuminator 43 ... Winding roller 44 ... Cleaning unit 45 ... Peeling roller 46 ... Sticking / peeling common roller 47 ... Ar laser light 48 ... Ultraviolet light 50 ... Protective film 50 '... Protective film 51, 53 ... Cover sheet 52 ... Optical adhesive 54 ... Black sheet 55, 56 ... Adhesive layer 60 ... Barrier member 61 ... Groove 62 ... Bank part 63 ... Refractive index matching liquid supply pipe 64 ... Squeegee (wiper) 66 ... Non-reflective coated glass vertical movement mechanism 67 ... Rod 68 ... Universal joint 71 ... Kr laser 72 ... Dye laser 73 ... Ar laser 74 ... Ar laser (excitation laser) 75-77 ... Variable beam Plitter 78 ... Total reflection mirror 79, 80 ... Dichroic mirror 81 ... Shading plate 82 ... Total reflection mirror 83, 84, 85 ... Beam splitter 89-92 ... Spatial filter 86-88 ... Total reflection mirror 101 ... Protective sheet 102 ... Cover Sheet 103 ... Adhesive layer 104 ... Transfer seal 105 ... Base material 471-474 ... Laser light

Claims (16)

[Claims] 1. A method for producing a hologram in which a photosensitive material film is brought into close contact with a hologram photographing object master plate and light is irradiated from the photosensitive material film side to perform hologram recording, wherein both surfaces of the photosensitive material are sandwiched by support films. While supplying the photosensitive material film, the support film on one surface is peeled off, and the peeled surface is directed toward the hologram photographing object master plate, and the photosensitive material film is squeezed from the opposite side by the roller to sequentially form the hologram photographing object master plate. Sticking, irradiating light from the side of the photosensitive material film, then sequentially peeling from one end while pressing the photosensitive material film stuck from the hologram photographing subject original plate with a roller,
A method of producing a hologram, characterized in that a protective film is sequentially attached to the peeled surface of the peeled photosensitive material film, and then the photosensitive material film is wound. 2. A hologram production method in which a photosensitive material film is brought into close contact with a hologram photographing subject original plate, and hologram recording is performed by irradiating light from the photosensitive material film side, wherein both sides of the photosensitive material are sandwiched by support films. While supplying the photosensitive material film, the support film on one surface is peeled off, and the peeled surface is directed toward the hologram photographing object master plate, and the photosensitive material film is squeezed from the opposite side by the roller to sequentially form the hologram photographing object master plate. Sticking, irradiating light from the side of the photosensitive material film, then sequentially peeling from one end while pressing the photosensitive material film stuck from the hologram photographing subject original plate with a roller,
A method for producing a hologram, characterized in that a color tuning film for broadening the diffraction wavelength is sequentially attached to the peeled surface of the peeled photosensitive material film, and then the photosensitive material film is wound. 3. The hologram manufacturing method according to claim 1, wherein the hologram photographing object master plate is made of a transparent solid block, and the hologram photographing object is enclosed therein. 4. The solid protective block according to claim 3, wherein a transparent protective transparent body is integrally provided on a front surface of the solid block, and a colorless transparent body, a colored transparent body, or a black absorbing body is integrally provided on a rear surface of the subject. A method for producing a hologram, characterized in that 5. A transparent protective transparent body is integrally provided on a front surface of the solid block, and a reflecting mirror, a scattering plate, a coloring plate, a pattern plate or the like is provided on a rear surface of the subject. A method for producing a hologram, characterized in that a combination of two or more of the above is integrally provided. 6. The hologram manufacturing method according to claim 3, wherein a transparent protective transparent body is integrally provided on a front surface of the solid block, and a hologram is integrally provided on a rear surface of the subject. . 7. The method according to any one of claims 3 to 6,
A method for producing a hologram, wherein the subject comprises a flat or curved mirror. 8. The hologram production method according to claim 1, wherein the light emitted from the side of the photosensitive material film comprises a plurality of lights having different wavelengths. 9. A hologram having a constant dimension in the longitudinal direction of a film on a long photosensitive material film comprising one or more adhesive layers or pressure-sensitive adhesive layers and one or more photosensitive material layers, both surfaces of which are sandwiched by a support film. A hologram recording body, wherein recording areas are periodically formed with a constant inter-frame spacing. 10. The hologram recording body according to claim 9, wherein a volume phase hologram is recorded in the hologram recording area. 11. The hologram recording body according to claim 10, wherein at least the hologram recording area is subjected to a process for widening a diffraction wavelength. 12. The support film according to claim 9, wherein the support film on one surface side is peeled from the film having a color or pattern and the adhesive layer or the adhesive layer in order from the photosensitive material layer side. A hologram recording body comprising a possible cover film. 13. A protective film, a hologram recording layer, a colored or patterned film, an adhesive layer or a pressure-sensitive adhesive layer, which can be peeled off, directly or with an adhesive layer or a pressure-sensitive adhesive layer between each layer, in order from the hologram observation side. Holographic recording material, which is formed by laminating different cover films. 14. The hologram recording body according to claim 13, wherein the cover film is peeled off, and the cover film is attached to the printed body with an adhesive layer or an adhesive layer thereon. 15. The hologram recording layer is recorded with a wavelength-multiplexed volume phase hologram, and a process for broadening the diffraction wavelength is performed.
4. The hologram recording body according to 4. 16. A hologram recording body, characterized in that a wavelength-multiplexed volume phase hologram is recorded, and a process for broadening the diffraction wavelength is performed.