CN100487560C - Illuminator and projector comprising it - Google Patents
Illuminator and projector comprising it Download PDFInfo
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- CN100487560C CN100487560C CNB2004800240457A CN200480024045A CN100487560C CN 100487560 C CN100487560 C CN 100487560C CN B2004800240457 A CNB2004800240457 A CN B2004800240457A CN 200480024045 A CN200480024045 A CN 200480024045A CN 100487560 C CN100487560 C CN 100487560C
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Abstract
An illuminator (100) comprising an arc tube (112), an ellipsoidal reflector (114), a collimating lens (116), a first lens array (120), a second lens array (130) and a polarization converting element (140), characterized in that the polarization converting element (140) comprises a first polarization separating part (145L) having a single polarization separating surface (141L) and a single reflective surface (142L) and performing polarization separation for the partial light beams from the first and second rows of the second lens array (130), a second polarization separating part (145R) having a single polarization separating surface (141R) and a single reflective surface (142R) and performing polarization separation for the partial light beams from the third and fourth rows of the second lens array (130), and a phase plate (143). An inexpensive illuminator and a projector having enhanced utilization efficiencies of light while prolonged lifetimes can thereby be provided.
Description
Technical field
The present invention relates to lighting device and possesses its projector.
Background technology
In general, projector, possess: the lighting device that penetrates illumination light, corresponding to picture signal to the electro-optic modulation arrangement of modulating and will be by the light after this electro-optic modulation arrangement modulation as the projection optical system of projector, image projection to the projecting planes such as screen from the illumination light of this lighting device.
In such projector, the Luminance Distribution that preferably is projected the image of demonstration is roughly uniform.For this reason, as lighting device, employing can with roughly uniformly light intensity distributions the field of illumination that forms image is shone, the lighting device that is made of so-called integrator optical system (for example, is opened 2002-No. 55208 communiques (Fig. 1～Fig. 3)) with reference to the spy.
Figure 13 is the figure of the existing lighting device of expression.Figure 14 is the figure that illustrates for the integrator optical system in the existing lighting device is described.Figure 14 (a) is the stereographic map of the 1st lens arra and the 2nd lens arra, and Figure 14 (b) is the front view (FV) of the 1st lens arra, and Figure 14 (c) is the figure of expression as the image forming area of the liquid-crystal apparatus of electro-optic modulation arrangement.
This lighting device 900 as shown in Figure 13, possesses light supply apparatus 910 and integrator optical system 960.
Light supply apparatus 910 has luminotron 912, ellipsoidal reflector 914 and parallelization lens 916.And, will be from light that luminotron 912 sent with ellipsoidal reflector 914 reflections and inject to illuminated area side, and will be transformed into the illuminating bundle of almost parallel and formation with parallelization lens 916 from the light of this ellipsoidal reflector 914 with penetrating.
Integrator optical system 960 has the 1st lens arra the 920, the 2nd lens arra 930, polarization conversion device 940 and overlapping lens 950.And, the 1st lens arra 920, be constituted as: will be divided into a plurality of segment beams from the illuminating bundle of light supply apparatus 910, and these a plurality of segment beams be overlapped onto on the image forming area LA of liquid-crystal apparatus 970 by the 2nd lens arra 930 and overlapping lens 950.Also have, the asperratio of the image forming area LA of liquid-crystal apparatus 970 as shown in Figure 14 (c), is set at longitudinal size (D
y): lateral dimension (D
xThe ratio of)=3: 4.
According to this lighting device 900,, also can be implemented on the image forming area LA of liquid-crystal apparatus 970 and have roughly the illuminating bundle of light intensity distributions uniformly even under the uneven situation of light intensity distributions of the illuminating bundle emitted from light supply apparatus 910.
; in such lighting device; for the raising of seeking the light utilization ratio in the projector and the reduction of stray light level, the lens shape of the lenslet in preferred the 1st lens arra is similar to the image forming area of liquid-crystal apparatus, and the shape of preferred the 1st lens arra is a square shape.
So in existing lighting device 900, as shown in Figure 14, the 1st lens arra 920 has and is arranged in that to make longitudinal direction and horizontal direction respectively be 8 row and 6 48 the rectangular lenslets 922 that are listed as.And,, set longitudinal size (d for the asperratio of lenslet 922
A): lateral dimension (d
BThe ratio of)=3: 4 makes the square shape that is shaped as of the 1st lens arra.
But, in existing lighting device 900, because the lenslet 922 of the 1st lens arra 920 is aligned to and makes longitudinal direction and horizontal direction respectively is the rectangular of 8 row and 6 row, the polarization separation portion of 2 kinds of light beams (P light beam and S light beam) will be become so need be used in from the 2nd lens arra 930 emitted each several part beam separation, as shown in Figure 13, dispose 6 row in a lateral direction.Therefore, have following problems: the structure of polarization conversion device 940 becomes complicated, is difficult to seek cheapization of the manufacturing cost of polarization conversion device 940 and even lighting device 900.
And, in the polarization conversion device 940 in existing lighting device 900, because make polarization separation portion dispose 6 row in a lateral direction, so be difficult to increase the size of polarization separation portion.Its result can not make under the situation that becomes fully little from the size of the emitted each several part light beam of the 2nd lens arra 930 problem that exists the light utilization ratio to reduce.
And, so can not make under the situation that becomes fully little from the size of the emitted each several part light beam of the 2nd lens arra 930, because the light quantity that is covered by shadow shield 944 increases, so the absorption heat in the shadow shield 944 has also increased.Its result in polarization conversion device 940, becomes big from the suffered heat affectings of shadow shield 944, the problem that exists the life of product of polarization conversion device 940 and even lighting device 900 to be easy to shorten.
Summary of the invention
Therefore, the present invention makes in order to solve such problem, and purpose is to provide the lighting device of the raising of cheapization that can seek manufacturing cost, light utilization ratio and long lifetime and possesses the projector that it is arranged.
Lighting device of the present invention, it possesses: the luminotron with illuminating part of the illumination light sent, near the position of the illuminating part of above-mentioned luminotron and with the position of above-mentioned illuminating part, compare and be positioned at the ellipsoidal reflector that illuminated area side place has focus respectively, to the parallelization lens that carry out parallelization from the emitted illuminating bundle of above-mentioned ellipsoidal reflector, to be divided into a plurality of segment beams by the illuminating bundle of above-mentioned parallelization lens institute parallelization, the lenslet of planar rectangular shape is arranged in longitudinal direction and horizontal direction is respectively 6 row and 4 the 1st rectangular lens arras that are listed as, have the transverse width narrower than the transverse width of above-mentioned the 1st lens arra, make the each several part parallel beam of being cut apart by the 1st lens arra in the 2nd lens arra of systematic optical axis, with will be from the emitted each several part light beam of above-mentioned the 2nd lens arra, be transformed into the polarization conversion device of the segment beam of polarization axle with predetermined direction
It is characterized in that, above-mentioned polarization conversion device, have: the 1st polarization separation portion, the 1st polarization separation portion comprises: to the segment beam of amounts of two row of the 1st row of above-mentioned the 2nd lens arra and the 2nd row, the segment beam of the polarization axle of the direction with a side is passed through, and reflection has the single polarization separation face of segment beam of polarization axle of the opposing party's direction, is made its consistent single reflecting surface on the direction parallel with the segment beam of the polarization axle of the direction with a side by the segment beam of the polarization axle of the direction with the opposing party that above-mentioned polarization separation face reflected with further reflection;
The 2nd polarization separation portion, the 2nd polarization separation portion has the symmetrical shape with above-mentioned the 1st polarization separation portion, comprise: to the segment beam of amounts of two row of the 3rd row of above-mentioned the 2nd lens arra and the 4th row, the segment beam of the polarization axle of the direction with a side is passed through, and reflection has the single polarization separation face of segment beam of polarization axle of the opposing party's direction, is made its consistent single reflecting surface on the direction parallel with the segment beam of the polarization axle of the direction with a side by the segment beam of the polarization axle of the direction with the opposing party that above-mentioned polarization separation face reflected with further reflection; And
The polarizer that disposed in any of zone of passing through at the segment beam of the polarization axle of the direction of passing through zone or the above-mentioned the opposing party of having of the segment beam of the polarization axle of above-mentioned direction with a side.
Therefore, according to lighting device of the present invention, because the number of permutations of the lenslet of the 1st lens arra is for 4 being listed as in a lateral direction, and, possesses polarization conversion device with polarization separation portion, the 1st polarization separation portion and the 2nd polarization separation portion that wherein have symmetrical shape all are by single polarization separation face and the single polarization separation portion that reflecting surface constituted, so the structure of polarization conversion device becomes simply, seeks cheapization of the manufacturing cost of polarization conversion device and even lighting device easily.
And, according to lighting device of the present invention, because also needn't as existing, make polarization separation portion also dispose 6 row in a lateral direction, so can increase the size of polarization separation portion to a certain degree.Its result is even under the situation that the size that can not make the each several part light beam emitted from the 2nd lens arra becomes fully little, also can suppress the reduction of light utilization ratio.
And, according to lighting device of the present invention, polarization conversion device, because do not need as shown in Figure 13 as existing polarization conversion device 940 at the area configurations shadow shield of striding the 1st polarization separation portion and the 2nd polarization separation portion, so can reduce heat affecting, can suppress the short lifeization of polarization conversion device and even lighting device from shadow shield.
Therefore, lighting device of the present invention becomes cheapization that can seek manufacturing cost, the raising of light utilization ratio and the lighting device of long lifetime.
Preferably: in lighting device of the present invention, the lenslet of above-mentioned the 1st lens arra is disposed at the matrix position the position that is listed as except the 1st row the 1st row, the 1st row the 4th row, the 6th row the 1st row and the 6th row the 4th corresponding to matrix.
By so constituting, can further cut down 4 lenslets in the lenslet of the 1st lens arra.
In addition, preferred: in lighting device of the present invention, the asperratio of the above-mentioned lenslet in above-mentioned the 1st lens arra is set at longitudinal size: the ratio of lateral dimension=3: 4.
By so constituting, be set to longitudinal size: under the situation that the electro-optic modulation arrangement of the ratio of lateral dimension=3: 4 is thrown light on, can seek the raising of light utilization ratio and the reduction of stray light level in asperratio to image forming area.
In addition, other lighting device of the present invention, it possesses: the luminotron with illuminating part of the illumination light sent, near the position of the illuminating part of above-mentioned luminotron and with the position of above-mentioned illuminating part, compare and be positioned at the ellipsoidal reflector that illuminated area side place has focus respectively, to the parallelization lens that carry out parallelization from the emitted illuminating bundle of above-mentioned ellipsoidal reflector, to be divided into a plurality of segment beams by the illuminating bundle of above-mentioned parallelization lens institute parallelization, the lenslet of planar rectangular shape is arranged in longitudinal direction and horizontal direction is respectively 7 row and 4 the 1st rectangular lens arras that are listed as, have the transverse width narrower than the transverse width of above-mentioned the 1st lens arra, make the each several part parallel beam of being cut apart by the 1st lens arra in the 2nd lens arra of systematic optical axis, with will be from the emitted each several part light beam of above-mentioned the 2nd lens arra, be transformed into the polarization conversion device of the segment beam of polarization axle with predetermined direction
It is characterized in that, above-mentioned polarization conversion device, have: the 1st polarization separation portion, the 1st polarization separation portion comprises: to the segment beam of amounts of two row of the 1st row of above-mentioned the 2nd lens arra and the 2nd row, make the single polarization separation face of segment beam of the polarization axle of segment beam by reflecting direction of the polarization axle of direction, made its consistent single reflecting surface on the direction parallel by the segment beam of the polarization axle of the direction that above-mentioned polarization separation face reflected with the segment beam of the polarization axle of direction with a side with the opposing party with further reflection with a side with the opposing party;
The 2nd polarization separation portion, it has the symmetrical shape with above-mentioned the 1st polarization separation portion, comprise: to the segment beam of amounts of two row of the 3rd row of above-mentioned the 2nd lens arra and the 4th row, make the single polarization separation face of segment beam of the polarization axle of segment beam by reflecting direction of the polarization axle of direction, made its consistent single reflecting surface on the direction parallel by the segment beam of the polarization axle of the direction that above-mentioned polarization separation face reflected with the segment beam of the polarization axle of direction with a side with the opposing party with further reflection with a side with the opposing party; And
The polarizer that disposed in any of zone of passing through at the segment beam of the polarization axle of the direction of passing through zone or the above-mentioned the opposing party of having of the segment beam of the polarization axle of above-mentioned direction with a side.
Therefore, according to other lighting device of the present invention, with lighting device of the present invention similarly, become cheapization that can seek manufacturing cost, the raising of light utilization ratio and the lighting device of long lifetime.And preferred: in other lighting device of the present invention, the lenslet of above-mentioned the 1st lens arra is disposed at except corresponding to the matrix position the position of the 1st row the 1st row, the 1st row the 4th row, the 7th row the 1st row and the 7th row the 4th row of matrix.
By so constituting, can further cut down 4 lenslets in the lenslet of the 1st lens arra.
In addition, preferred: in other lighting device of the present invention, the asperratio of the above-mentioned lenslet in above-mentioned the 1st lens arra is set at longitudinal size: the ratio of lateral dimension=9: 16.
By so constituting, be set to longitudinal size in asperratio: under the situation that the electro-optic modulation arrangement that the wide visual field of the ratio of lateral dimension=9: 16 is used is thrown light on, can seek the raising of the light utilization ratio in the projector and the reduction of stray light level to image forming area.
In addition, preferred: in lighting device of the present invention or other lighting device of the present invention, above-mentioned polarizer is pass through zone, the single polarizer that disposes continuously at the segment beam of the polarization axle of above-mentioned direction with a side.
By so constituting, can simplify installation exercise for the polarizer of polarization separation portion, can seek the simplification of the assembling operation of polarization conversion device.
In addition, preferably: in lighting device of the present invention or other lighting device of the present invention, above-mentioned polarization conversion device is that the polarization conversion device of trapezoidal shape constitutes by xsect, disposes above-mentioned reflecting surface at the position corresponding to two trapezoidal sides of above-mentioned polarization conversion device.
By so constituting, can also can further simplify its structure by the miniaturization polarization conversion device, can seek cheapization of manufacturing cost.
In addition, preferred: in lighting device of the present invention or other lighting device of the present invention, the maximum transverse size of above-mentioned the 2nd lens arra is set the roughly size of half of the maximum transverse size of above-mentioned the 1st lens arra for.
By so constituting, because can reduce the size of the 2nd lens arra, so can seek the miniaturization of the 2nd lens arra and cheapization of manufacturing cost.
In addition, preferred: in lighting device of the present invention or other lighting device of the present invention, the lateral dimension of the light entrance face of above-mentioned polarization conversion device is set the size roughly the same with the maximum transverse size of above-mentioned the 2nd lens arra for.
By so constituting, can on the light entrance face of polarization conversion device, make each several part light beam incident efficiently from the 2nd lens arra, can seek the raising of the light utilization ratio in the lighting device.
In addition, preferred: as in lighting device of the present invention or other lighting device of the present invention, on above-mentioned luminotron, the reflector element that the light that will be issued to illuminated area side from above-mentioned luminotron reflects to above-mentioned ellipsoidal reflector to be set.
By so constituting, because be issued to the light of illuminated area side is reflected to ellipsoidal reflector from luminotron, so size that will ellipsoidal reflector is set the size until the illuminated area side end that covers luminotron for, can seek the miniaturization of ellipsoidal reflector, as a result of can seek the miniaturization of lighting device.
And, because can seek the miniaturization of ellipsoidal reflector, can make from beams focusing angle and the beam spots of ellipsoidal reflector and diminish to the 2nd focus focusing of ellipsoidal reflector, so can further reduce with the parallelization lens is each optical element of the back level of beginning, can seek the further miniaturization of lighting device.Projector of the present invention, it is characterized in that, possess: lighting device of the present invention or other lighting device of the present invention, corresponding to image information to the electro-optic modulation arrangement of modulating and projection projection optical system from the light modulated of above-mentioned electro-optic modulation arrangement from above-mentioned lighting device or above-mentioned other the illumination light of lighting device.
Therefore, projector of the present invention is as above-mentioned ground, because possess cheapization that can seek manufacturing cost, the raising of light utilization ratio and the good lighting device of long lifetime, so become low price, high brightness and long-life projector.
Description of drawings
Fig. 1 is the figure that shows for the optical system of the projector that embodiment 1 is described.
Fig. 2 is the figure that shows for the lighting device that embodiment 1 is described.
Fig. 3 is the figure that shows for the 1st lens arra in the embodiment 1 is described.
Fig. 4 is the figure that shows for the 1st lens arra in the embodiment 1 is described.
Fig. 5 is the figure of the track of the light beam in the major part of lighting device of expression embodiment 1.
Fig. 6 is the figure that shows for the 2nd lens arra in the embodiment 1 is described.
Fig. 7 is the figure that shows for the polarization conversion device in the embodiment 1 is described.
Fig. 8 is the figure that shows for the variation that the polarization conversion device in the embodiment 1 is described.
Fig. 9 is the figure that shows for the 1st lens arra that embodiment 2 is described.
Figure 10 is the figure that shows for the 1st lens arra that embodiment 3 is described.
Figure 11 is the figure that shows for the 1st lens arra that embodiment 4 is described.
Figure 12 is the figure that shows for the lighting device that embodiment 5 is described.
Figure 13 is the figure of the existing lighting device of expression.
Figure 14 is the figure that shows for the integrator optical system in the existing lighting device is described.
Embodiment
Below, to lighting device of the present invention and possess its projector, describe according to the embodiment shown in the figure.
Fig. 1 is for the optical system of projector that embodiment 1 is described and the figure that shows.Also have, in the following description, 3 directions of mutually orthogonal are made as z direction (direction parallel with systematic optical axis), x direction (perpendicular to the z direction and be parallel to the direction of paper) and y direction (perpendicular to the direction of paper) respectively.
The projector 1 of embodiment 1 as shown in FIG. 1, possesses: lighting device 100, color separation optical system 200, relay optical system 300,3 liquid- crystal apparatus 400R, 400G, 400B, cross colour splitting prism 500 and projection optical system 600.The composed component of each optical system is the center with cross colour splitting prism 500, disposes on general horizontal direction.
Also have, about the details aftermentioned of lighting device 100.
Color separation optical system 200 has from the emitted illuminating bundle of lighting device 100, is separated into the function of illuminating bundle of 3 looks of different respectively wavelength region may.The 1st dichronic mirror 210, the roughly blue light beam of reflection (below, be called " B light ".), and make roughly green light beam (below, be called " G light ".) and roughly red light beam (below, be called " R light ".) transmission.By the B light after the reflection of the 1st dichronic mirror 210, mirror 230 reflections that are reflected again, transmitted field lens 240B and liquid-crystal apparatus 400B that the B light that throws light on is used.
G light behind transmission the 1st dichronic mirror 210 and the G light among the R light, by the reflection of the 2nd dichronic mirror 220, transmitted field lens 240G and liquid-crystal apparatus 400G that the G light that throws light on is used.On the other hand, R light, transmission the 2nd dichronic mirror 220, and by the relay optical system 300 liquid-crystal apparatus 400R that R light uses that throws light on.
Relay optical system 300 has: light incident side lens 310, light incident side catoptron 320, relay lens 330, emitting side catoptron 340 and field lens 350.From the emitted R light of color separation optical system 200, by light incident side lens 310 converge to relay lens 330 near, and disperse to emitting side catoptron 340 and field lens 350.Incide the size of the light beam on the field lens 350, set for and be substantially equal to the size that incides the light beam on the light incident side lens 310.
Liquid- crystal apparatus 400R, 400G, 400B that each coloured light is used with the coloured light on the light entrance face that incides separately, are transformed into the light corresponding to corresponding with it respectively picture signal, and the light after penetrating these and being transformed is as transmitted light.Light incident side at liquid- crystal apparatus 400R, 400G, 400B disposes light incident side polarization plates 918R, 918G, 918B respectively, disposes emitting side polarization plates 920R, 920G, 920B respectively at emitting side.It as liquid- crystal apparatus 400R, 400G, 400B, is longitudinal size: the liquid-crystal apparatus of the transmission-type of the ratio of lateral dimension=3: 4 with the asperratio with image forming area.
Cross colour splitting prism 500 has the function as the look combining optical that the emitted conversion light of all kinds of liquid-crystal apparatus 400R, the 400G, the 400B that use from each coloured light is synthesized.And, have the R light reflection color separation face 510R of reflection R light and the B light reflection color separation face 510B of reflection B light.R light reflection color separation face 510R and B light reflection color separation face 510B, forming roughly by dielectric multilayer film that will reflect R light on the interface of 4 right-angle prisms and the dielectric multilayer film that reflects B light, X word shape is provided with.Reflect the conversion light that color separation face 510R, 510B synthesize 3 looks, the light of generation color display by these two.The synthetic light that is generated in cross colour splitting prism 500 penetrates to projection optical system 600.
Projection optical system 600 will project to as display image from the synthetic light of cross colour splitting prism 500 on the projecting plane of screen etc. and constitute like that.
Secondly, the lighting device to embodiment 1 explains with Fig. 2～Fig. 7.Fig. 2 is the figure that shows for the lighting device that embodiment 1 is described.Fig. 3 is the figure that shows for the 1st lens arra that embodiment 1 is described.Fig. 3 (a) is the figure that sees the 1st lens arra along systematic optical axis from the front, and Fig. 3 (b) is the figure of light intensity distributions in the light entrance face of expression the 1st lens arra.Fig. 4 is the figure that shows for the 1st lens arra in the embodiment 1 is described.Fig. 4 (a) is the figure of the light intensity distributions in the light entrance face of expression parallelization lens, and Fig. 4 (b) is the figure of the light intensity distributions in the light entrance face of expression the 1st lens arra.Fig. 5 is the figure of the track of wanting the light beam in the portion of the lighting device of expression embodiment 1.Part with grey colour specification light beam.Fig. 6 is the figure that shows for the 2nd lens arra that embodiment 1 is described.Fig. 6 (a) is the figure that sees the 2nd lens arra along systematic optical axis from the front, and Fig. 6 (b) is the figure of light intensity distributions in the light entrance face of expression the 2nd lens arra.Fig. 7 is the figure that shows for the polarization conversion device in the embodiment 1 is described.
The lighting device 100 of embodiment 1 as shown in FIG. 2, has: light supply apparatus 110, the 1 lens arra 120, the 2 lens arras 130, polarization conversion device 140 and overlapping lens 150.
As luminotron 112, for example, use high-pressure mercury-vapor lamp.Also have, also can enough metal halide lamps or other lamp such as xenon lamp.
The 1st lens arra 120 as shown in Fig. 2～Fig. 5, has a plurality of lenslets 122, and is disposed at the illuminated area side of parallelization lens 116.And, will be divided into a plurality of segment beams by the illuminating bundle after parallelization lens 116 almost parallelizations and constitute like that.And incident light district territory 120a is positioned at the focal point F than ellipsoidal reflector 114
2Constitute like that near ellipsoidal reflector side (position of leaving apart from image point O maintenance optical range L=48mm).Therefore, from the outgoing beam L of parallelization lens 116, as shown in Fig. 3 (b), its light quantity spreads all on the incident light district territory of the 1st lens arra 120 120a (with reference to Fig. 2) integrally and distributes, and promptly eliminates the shadow of luminotron 112.
Also have, in the lighting device 100 of embodiment 1, parallelization lens 116 as shown in Fig. 4 (a) and Fig. 5, are disposed at the A place, position on the systematic optical axis OC that has the terrifically little region S of incident intensity (territory, shadow zone) in the light entrance face central portion.With respect to this, the 1st lens arra 120 as shown in Fig. 4 (b) and Fig. 5, is disposed at the B place, position on the systematic optical axis OC that does not have the terrifically little region S of incident intensity (territory, shadow zone) in the light entrance face central portion, that is, apart from image point O (with reference to Fig. 2.) keep optical range L=48mm and the position left.
In the lighting device 100 of embodiment 1, the lenslet 122 of the 1st lens arra 120, as as shown in Fig. 3 (a), being arranged in the face that is orthogonal to systematic optical axis OC and making longitudinal direction and horizontal direction respectively is the rectangular of 6 row and 4 row, and, be disposed at position corresponding to each each row of row of this matrix.Thus, the number that can make the lenslet 122 of the 1st lens arra 120 is 24, can cut down number of lenses.Therefore, can seek the simplification of the manufacturing processing in the 1st lens arra and cheapization of cost.
In the lighting device 100 of embodiment 1, the asperratio of the lenslet 122 in the 1st lens arra 120 is set at longitudinal size (d
A): lateral dimension (d
BThe ratio of)=3: 4.Thus, be configured to longitudinal size: under the situation that the liquid-crystal apparatus of the ratio of lateral dimension=3: 4 throws light on, can seek the raising of light utilization ratio and the reduction of stray light level in asperratio to image forming area.
In the lighting device 100 of embodiment 1, the effective diameter W of parallelization lens 116
L,, be set at maximum longitudinal size D with the 1st lens arra 120 as shown in Fig. 3 (a)
ARoughly the same size.Thus, can make in the face of the light entrance face of the 1st lens arra light intensity distributions more even.
The 2nd lens arra 130 as shown in FIG. 2, has a plurality of lenslets 132 corresponding to the lenslet 122 of the 1st lens arra 120, and is disposed at the illuminated area side of the 1st lens arra 120.And, constitute, make the each several part light beam after being cut apart by the 1st lens arra 120 become the segment beam parallel with systematic optical axis OC, and, cooperate with overlapping lens 150 and this each several part light beam is overlapped onto on the image forming area of liquid- crystal apparatus 400R, 400G, 400B.
In the lighting device 100 of embodiment 1, the maximum transverse size D of the 2nd lens arra 130
D, as shown in FIG. 7, set the maximum transverse size D of the 1st lens arra 120 for
BThe roughly size of half.Thus, because can reduce the size of the 2nd lens arra 130, so can seek the miniaturization of the 2nd lens arra and cheapization of manufacturing cost.
The lenslet 132 of the 2nd lens arra 130, with the lenslet 122 of the 1st lens arra 120 similarly, being arranged in the face that is orthogonal to systematic optical axis OC and making longitudinal direction and horizontal direction respectively is the rectangular of 6 row and 4 row, and, be disposed at position corresponding to each each row of row of this matrix.Thus, the number that can make the lenslet 132 of the 2nd lens arra 130 is 24, can cut down number of lenses.Therefore, can seek the simplification of the manufacturing processing in the 2nd lens arra and cheapization of cost.
Also have, the lenslet 122 of the 1st lens arra 120, also can constitute: being arranged in the face that is orthogonal to systematic optical axis OC and making longitudinal direction and horizontal direction respectively is the rectangular of 6 row and 4 row, and, be disposed at the matrix position the position that is listed as except the 1st row the 1st row, the 1st row the 4th row, the 6th row the 1st row and the 6th row the 4th corresponding to this matrix.Under this situation, can further cut down 4 lenslets in the lenslet 122 of the 1st above-mentioned lens arra 120.
Under this situation, the lenslet 132 of the 2nd lens arra 130, also can constitute:, be disposed at except corresponding to the matrix position the position of the 1st row the 1st row, the 1st row the 4th row, the 6th row the 1st row and the 6th row the 4th row of the matrix of 6 row, 4 row corresponding to the configuration of the lenslet 122 of the 1st lens arra 120.Thus, can further cut down 4 lenslets in the lenslet 132 of the 2nd above-mentioned lens arra 130.
The 1st 145L of polarization separation portion, have: to the segment beam of amounts of two row of the lenslet 132 (2) of the lenslet 132 (1) of the 1st row of the 2nd lens arra 130 and the 2nd row, make the direction with a side polarization axle the polarization axle of segment beam by reflecting direction with the opposing party segment beam single polarization separation face 141L and further reflection be polarized the segment beam of the polarization axle of the direction that parting plane 141L reflected with the opposing party, and make its with the parallel direction of the segment beam of the polarization axle of direction with a side on consistent single reflecting surface 142L.
The 2nd 145R of polarization separation portion, have: to the segment beam of amounts of two row of the lenslet 132 (4) of the lenslet 132 (3) of the 3rd row of the 2nd lens arra 130 and the 4th row, make the direction with a side polarization axle the polarization axle of segment beam by reflecting direction with the opposing party segment beam single polarization separation face 141R and further reflection be polarized the segment beam of the polarization axle of the direction that parting plane 141R reflected with the opposing party, and make its with the parallel direction of the segment beam of the polarization axle of direction with a side on consistent single reflecting surface 142R.
In the lighting device 100 of embodiment 1, polarizer 143 is to pass through zone, the single polarizer of configuration continuously at the segment beam of the polarization axle of the direction with a side.Thus, installation exercise can be simplified, the simplification of the assembling operation of polarization conversion device can be sought for the polarizer 143 of the 1st 145L of polarization separation portion and the 2nd 145R of polarization separation portion.
Near the light entrance face of polarization conversion device 140, as shown in FIG. 7, form shadow shield 144L, 144R.Thus, because can will not wish that the light that incides polarization conversion device 140 is covered by shadow shield 144L, 144R, so can suppress to result from the deterioration of optical property that undesirable light carries out the polarization conversion device of incident.
In the lighting device 100 of embodiment 1, as shown in FIG. 7, polarization conversion device 140 is that the polarization conversion device of trapezoidal shape constitutes by xsect, at above-mentioned reflecting surface 142L, the 142R of position configuration corresponding to two trapezoidal sides of this polarization conversion device 140.Thus, can also its structure can be further simplified by the miniaturization polarization conversion device, cheapization of manufacturing cost can be sought.
In the lighting device 100 of embodiment 1, the lateral dimension of the light entrance face of polarization conversion device 140 as shown in FIG. 7, is set the maximum transverse size D with the 2nd lens arra 120 for
DRoughly the same size.Thus, each several part light beam incident efficiently can be made, the raising of the light utilization ratio in the lighting device can be sought at the light entrance face place of polarization conversion device 140 from the 2nd lens arra 130.
Overlapping lens 150 are made of collector lens, are disposed at the illuminated area side of polarization conversion device 140.And, make from the emitted beam condenser of polarization conversion device 140, and together make on its image forming area that overlaps onto liquid- crystal apparatus 400R, 400G, 400B with the 2nd lens arra 130 and to constitute like that.
And, according to the lighting device 100 of embodiment 1, because also needn't as existing, make polarization separation portion dispose 6 row in a lateral direction, so can increase the size of polarization separation portion to a certain degree.Its result is even under the situation that the size that can not make the each several part light beam emitted from the 2nd lens arra becomes fully little, also can suppress the reduction of light utilization ratio.
And, lighting device 100 according to embodiment 1, polarization conversion device 140, because do not need as shown in Figure 13 as existing polarization conversion device 940 at the area configurations shadow shield of striding the 1st 145L of polarization separation portion and the 2nd 145R of polarization separation portion, so can reduce heat affecting, can suppress the short lifeization of polarization conversion device and even lighting device from shadow shield.
Therefore, the lighting device 100 of embodiment 1 becomes cheapization that can seek manufacturing cost, the raising of light utilization ratio and the lighting device of long lifetime.
In addition, the projector 1 of embodiment 1, possess: above-mentioned lighting device 100, corresponding to image information to liquid- crystal apparatus 400R, 400G, 400B and the projection of modulating projection optical system 600 from the light modulated of this liquid- crystal apparatus 400R, 400G, 400B from the illumination light of this lighting device 100.
Therefore, the projector 1 of embodiment 1 is as above-mentioned ground, because possess cheapization that can seek manufacturing cost, the raising of light utilization ratio and the good lighting device 100 of long lifetime, so become low price, high brightness and long-life projector.
At this, in the lighting device 100 of embodiment 1, also can adopt polarization conversion device as follows.Fig. 8 is the figure that shows for the variation that the polarization conversion device in the embodiment 1 is described.Fig. 8 (a) is its variation 1 of expression and the figure that shows.Fig. 8 (b) is its variation 2 of expression and the figure that shows.
The polarization conversion device 140B of variation 1 as shown in Fig. 8 (a), has the part 146L, the 146R that are removed in the polarization conversion device 140 of embodiment 1 by not removing, xsect is constituted by rectangular-shaped polarization conversion device.Thus, the operation that polarization conversion device is installed in the housing that is used for installing each optical element has become easily.
The polarization conversion device 140C of variation 2 and the difference of the polarization conversion device 140 in the embodiment 1 are the configuration position of the polarizer that has that it's too late of shadow shield.
That is, in the polarization conversion device 140 of embodiment 1, near its light entrance face, form as shown in Figure 7 shadow shield 144L, 144R; And, in the polarization conversion device 140C of variation 2,, do not form such shadow shield as shown in Fig. 8 (b) with respect to this.But, even under this situation that does not form shadow shield, because also can will not wish that the light that incides polarization conversion device 140C is reflexed to outside the system by reflecting surface 142L, 142R, so can suppress to result from the deterioration of optical property that undesirable light carries out the polarization conversion device of incident.
In addition, in the polarization conversion device 140 in embodiment 1,, pass through area configurations polarizer 143 (with reference to Fig. 7 at the segment beam of the polarization axle of direction with a side as above-mentioned ground.); With respect to this, in the polarization conversion device 140C of variation 2, as shown in Fig. 8 (b), pass through zone configuration phase difference plate 143CL, 143CR respectively at the segment beam of the polarization axle of direction with the opposing party.Thus because can make the segment beam that becomes the polarization axle of direction from the emitted segment beam of polarization conversion device 140C with a side, so with the situation of embodiment 1 similarly, be suitable for using in the projector of the liquid-crystal apparatus that adopts polarized light.
Ground as described above, though polarization conversion device 140B, the 140C of variation 1 and variation 2, with the polarization conversion device 140 in the embodiment 1, aspects such as configuration position at the polarizer that has that it's too late of shadow shield seem different, but with the situation of embodiment 1 similarly, be to have the 1st 145BL of polarization separation portion, 145CL, the polarization conversion device of the 2nd 145BR of polarization separation portion, 145CR and polarizer 143 (situation of variation 2 is polarizer 143CL, 143CR).Therefore, possess the lighting device that these polarization conversion devices 140B, 140C are arranged, with the lighting device 100 of embodiment 1 similarly, become cheapization that can seek manufacturing cost, the raising of light utilization ratio and the lighting device of long lifetime.
Fig. 9 is the figure that shows for the 1st lens arra in the embodiment 2 is described.Fig. 9 (a) is the figure that sees the 1st lens arra along systematic optical axis from the front, and Fig. 9 (b) is the figure of light intensity distributions in the light entrance face of expression the 1st lens arra.
The lighting device of embodiment 2 is (not shown.), the maximum longitudinal size of the effective diameter of parallelization lens and the 1st lens arra or the relation of maximum transverse size are different with the situation of the lighting device 100 of embodiment 1.That is, in the lighting device 100 of embodiment 1, the effective diameter W of parallelization lens 116
L,, be set at maximum longitudinal size D with the 1st lens arra 120 as shown in Fig. 3 (a)
ARoughly the same size; And with respect to this, in the lighting device of embodiment 2, the effective diameter W of parallelization lens 116
L,, be set at maximum transverse size D with the 1st lens arra 120B as shown in Fig. 9 (a)
BRoughly the same size.
So, because in the lighting device of embodiment 2, though the relation in the lighting device 100 of the maximum longitudinal size of the effective diameter of parallelization lens and the 1st lens arra or the relation of maximum transverse size and embodiment 1 is inequality, but on other aspects, have the same formation of situation with the lighting device 100 of embodiment 1, so has the same effect of effect that the lighting device 100 with embodiment 1 is had.
And, in the lighting device of embodiment 2, as above-mentioned ground, the effective diameter W of parallelization lens 116
L, be set at maximum transverse size D with the 1st lens arra 120B
BRoughly the same size.Thus, as shown in Fig. 9 (b) because can make from the emitted light beam of parallelization lens 116 almost all light quantities enter the light entrance face of the 1st lens arra 120B, so the light utilization ratio among the 1st lens arra 120B is improved.
Figure 10 is the figure that shows for the 1st lens arra in the embodiment 3 is described.Figure 10 (a) is the figure that sees the 1st lens arra along systematic optical axis from the front, and Figure 10 (b) is the figure of light intensity distributions in the light entrance face of expression the 1st lens arra.
The lighting device of embodiment 3 is (not shown.), the maximum longitudinal size of the asperratio of the lenslet in the 1st lens arra, the effective diameter that reaches the parallelization lens and the 1st lens arra or the relation of maximum transverse size are different with the situation of the lighting device 100 of embodiment 1.That is, in the lighting device 100 of embodiment 1, the asperratio of the lenslet 122 in the 1st lens arra 120 is set at longitudinal size (d
A): lateral dimension (d
BThe ratio of)=3: 4; And with respect to this, in the lighting device of embodiment 3, the asperratio of the lenslet 122C among the 1st lens arra 120C is set at longitudinal size (d
A): lateral dimension (d
BThe ratio of)=2: 3.And, in the lighting device 100 of embodiment 1, the effective diameter W of parallelization lens 116
L,, be set at maximum longitudinal size D with the 1st lens arra 120 as shown in Fig. 3 (a)
ARoughly the same size; And with respect to this, in the lighting device of embodiment 3, the effective diameter W of parallelization lens 116
L,, be set at maximum longitudinal size D with the 1st lens arra 120C as shown in Figure 10 (a)
AAnd maximum transverse size D
BRoughly the same size.
So, because in the lighting device of embodiment 3, though the relation in the lighting device 100 of the maximum longitudinal size of the asperratio of the lenslet in the 1st lens arra, the effective diameter that reaches the parallelization lens and the 1st lens arra or the relation of maximum transverse size and embodiment 1 is inequality, but on other aspects, have the same formation of situation with the lighting device 100 of embodiment 1, so has the effect same effect that the lighting device 100 with embodiment 1 is had.
And in the lighting device of embodiment 3, as above-mentioned ground, the asperratio of the lenslet 122C among the 1st lens arra 120C is set at longitudinal size (d
A): lateral dimension (d
BThe ratio of)=2: 3; And the effective diameter W of parallelization lens 116
L, be set to maximum longitudinal size D with the 1st lens arra 120C
AAnd maximum transverse size D
BRoughly the same size.
Thus, can make the square shape that is shaped as of the 1st lens arra 120C.And, because the effective diameter W of parallelization lens 116
L, be set at maximum longitudinal size D with the 1st lens arra 120C
AAnd maximum transverse size D
BSo roughly the same size as shown in Figure 10, can make the incircle that becomes the 1st lens arra 120C from the illuminating bundle of parallelization lens 116.Therefore, the reduction of light intensity distributions characteristic in the face in the light entrance face of the 1st lens arra 120C can be suppressed at, the raising of the light utilization ratio among the 1st lens arra 120C can be sought.
Also have, in the lighting device of embodiment 3, preferred: for the asperratio in the cross section that makes the illuminating bundle in the illuminated zone is longitudinal size (d
A): lateral dimension (d
BThe ratio of)=3: 4 possesses the optical element of cylindrical lens to proofreading and correct from the asperratio of the illuminating bundle of the 1st lens arra 120C etc.Thus, from the asperratio of the emitted illuminating bundle of the 1st lens arra 120C,, on image forming area, be corrected as longitudinal size: the ratio of lateral dimension=3: 4 as the liquid-crystal apparatus in illuminated zone by the function of such optical element.Therefore, can seek the raising of the light utilization ratio in the projector and the reduction of stray light level.
Figure 11 is the figure that shows for the 1st lens arra in the embodiment 4 is described.Figure 11 (a) is the figure that sees the 1st lens arra along systematic optical axis from the front, and Figure 11 (b) is the figure of light intensity distributions in the light entrance face of expression the 1st lens arra.
The projector of embodiment 4 is (not shown.), the formation of liquid-crystal apparatus is different with the situation of the projector 1 of embodiment 1.That is, in the projector 1 of embodiment 1, adopt asperratio to be set at longitudinal size: liquid- crystal apparatus 400R, 400G, the 400B of the ratio of lateral dimension=3: 4 with image forming area; And, in the projector of embodiment 4, adopting asperratio to be set at longitudinal size with image forming area with respect to this: the liquid-crystal apparatus that the wide visual field of the ratio of lateral dimension=9: 16 is used is (not shown.)。
And the lighting device of embodiment 4 is (not shown.), follow the difference of the formation of liquid-crystal apparatus as described above, the formation of the 1st lens arra and the 2nd lens arra is different with the situation of the lighting device 100 of embodiment 1.Promptly, the lighting device of embodiment 4, possess: light supply apparatus 110, will from light supply apparatus 110 emitted illuminating bundles be divided into a plurality of segment beams, the lenslet 122D of planar rectangular shape is arranged in the 1st rectangular lens arra 120D (with reference to Figure 11 (a)) that longitudinal direction and horizontal direction are respectively 7 row and 4 row, have the transverse width narrower, make the each several part parallel beam of being cut apart by the 1st lens arra 120D (not shown in the 2nd lens arra of systematic optical axis than the transverse width of the 1st lens arra 120D.) and will be from the emitted each several part light beam of the 2nd lens arra, be transformed into the polarization conversion device 140 of the segment beam of polarization axle with predetermined direction.
Therefore, lighting device according to embodiment 4, because possess above-mentioned polarization conversion device 140, thus with the lighting device 100 of embodiment 1 similarly, become cheapization that can seek manufacturing cost, the raising of light utilization ratio and the lighting device of long lifetime.
In the lighting device of embodiment 4, the lenslet 122D of the 1st lens arra 120D, as as shown in Figure 11 (a), being arranged in the face that is orthogonal to systematic optical axis OC and making longitudinal direction and horizontal direction respectively is the rectangular of 7 row and 4 row, and, be disposed at position corresponding to each each row of row of this matrix.Thus, the number that can make the lenslet 122D of the 1st lens arra 120D is 28, can cut down number of lenses.Therefore, can seek the simplification of manufacturing processing of the 1st lens arra and cheapization of cost.
In the lighting device of embodiment 4, the asperratio of the lenslet 122D among the 1st lens arra 120D is set at longitudinal size (d
A): lateral dimension (d
BThe ratio of)=9: 16.Thus, be configured to longitudinal size in asperratio: under the situation that the liquid-crystal apparatus that the wide visual field of the ratio of lateral dimension=9:16 is used throws light on, can seek the raising of the light utilization ratio in the projector and the reduction of stray light level to image forming area.
Also have, in the lighting device of embodiment 4, also can constitute,, be disposed at except corresponding to the matrix position the position of the 1st row the 1st row, the 1st row the 4th row, the 7th row the 1st row and the 7th row the 4th row of the matrix of 7 row 4 row the lenslet 122D of the 1st lens arra 120D.Thus, can further cut down 4 lenslets among the lenslet 122D of the 1st lens arra 120D.
Embodiment 5
Figure 12 is the figure that shows for the lighting device that embodiment 5 is described.Also have, in Figure 12,, omit detailed explanation the member additional phase identical symbol together with Fig. 2.
The lighting device 100B of embodiment 5, the formation of light supply apparatus is different with the situation of the lighting device 100 of embodiment 1.That is, in the lighting device 100B of embodiment 5, light supply apparatus 110B as shown in Figure 12, also possesses the auxiliary mirror 113 as reflector element that the light that will inject to illuminated area side from luminotron 112 reflects to ellipsoidal reflector 114.
Auxiliary mirror 113 is made of the reflective concave surface body, is disposed at the illuminated area side of illuminating part 112a.Specifically, be disposed to be positioned at and compare with " be parallel to the xy plane and comprise the plane of the center P c of illuminating part 112a " by space+z direction side (from the direct of travel side of the emitted light of light supply apparatus 110B), that use with half pipe face spaced registry roughly and the position of subtend.Auxiliary mirror 113, for example, can be by evaporation Ta on the concave surface of concaver
2O
5And SiO
2The dielectric multilayer film and form.
So, because the lighting device 100B of embodiment 5, though the formation of light supply apparatus is different with the formation of the lighting device 100 of embodiment 1, but on other aspects, has the same formation of situation with the lighting device 100 of embodiment 1, so have the identical effect of effect that is had with the lighting device 100 of embodiment 1.
And, in the lighting device 100B of embodiment 5, on luminotron 112, the auxiliary mirror 113 that the light that will inject to illuminated area side from luminotron 112 reflects to ellipsoidal reflector 114 is set.Thus, because emit to the light of illuminated area side is reflected to ellipsoidal reflector 114 from luminotron 112, so, size that will ellipsoidal reflector is set the size until the illuminated area side end that covers luminotron 112 for, can seek the miniaturization of ellipsoidal reflector, as a result of can seek the miniaturization of lighting device.
And,, can make from the 2nd focal point F of ellipsoidal reflector 114 to ellipsoidal reflector 114 because by seeking the miniaturization of ellipsoidal reflector
2The beams focusing angle and the beam spots that focus on diminish, and are that each optical element of the back level of beginning becomes littler so can make with parallelization lens 116, can seek the further miniaturization of lighting device.
Also have, in the lighting device 100B of embodiment 5, also can replace auxiliary mirror 113 ground, use by evaporation etc. and directly be formed at reflectance coating on the pipe face of luminotron 112 as reflector element.
Claims (18)
1. lighting device, it possesses:
Luminotron with illuminating part of the illumination light sent,
Near the position of the illuminating part of above-mentioned luminotron and with the position of above-mentioned illuminating part, compare and be positioned at illuminated area side place, have the ellipsoidal reflector of focus respectively,
To the parallelization lens that carry out parallelization from the emitted illuminating bundle of above-mentioned ellipsoidal reflector,
To be divided into lenslet a plurality of segment beams, that make the planar rectangular shape by the illuminating bundle of above-mentioned parallelization lens institute parallelization and be arranged in the 1st rectangular lens arras that longitudinal direction and horizontal direction are respectively 6 row and 4 row,
Have the transverse width narrower than the transverse width of above-mentioned the 1st lens arra, make the each several part parallel beam cut apart by the 1st lens arra in the 2nd lens arra of systematic optical axis and
To become to have the polarization conversion device of light beam of the polarization axle of predetermined direction from the emitted each several part optical beam transformation of above-mentioned the 2nd lens arra,
It is characterized in that above-mentioned polarization conversion device has:
The 1st polarization separation portion, it comprises: to transmission the light beam of the 1st row of above-mentioned the 2nd lens arra and the 2nd row, make the single polarization separation face and the further light beam of the polarization axle of the direction that reflected by above-mentioned polarization separation face of the reflection single reflecting surface of parallel beam of polarization axle that makes it and have a side direction of light beam of the polarization axle of light beam by reflect direction of the polarization axle of direction with a side with the opposing party with the opposing party;
The 2nd polarization separation portion, it has the symmetrical shape with above-mentioned the 1st polarization separation portion, have: to transmission the light beam of the 3rd row of above-mentioned the 2nd lens arra and the 4th row, make the single polarization separation face and the further light beam of the polarization axle of the direction that reflected by above-mentioned polarization separation face of the reflection single reflecting surface of parallel beam of polarization axle that makes it and have a side direction of light beam of the polarization axle of light beam by reflect direction of the polarization axle of direction with a side with the opposing party with the opposing party; With
Polarizer, it is disposed at the passing through in any zone in the zone of light beam of polarization axle of the direction of passing through zone or the above-mentioned the opposing party of having of light beam of the polarization axle of above-mentioned direction with a side.
2. according to the described lighting device of claim 1, it is characterized in that,
The lenslet of above-mentioned the 1st lens arra is disposed at the matrix position the position that is listed as except the 1st row the 1st row, the 1st row the 4th row, the 6th row the 1st row and the 6th row the 4th corresponding to matrix.
3. according to claim 1 or 2 described lighting devices, it is characterized in that,
The asperratio of the above-mentioned lenslet in above-mentioned the 1st lens arra is set at longitudinal size: the ratio of lateral dimension=3: 4.
4. according to claim 1 or 2 described lighting devices, it is characterized in that,
Above-mentioned polarizer is to pass through the zone single polarizer of configuration continuously at the segment beam of the polarization axle of above-mentioned direction with a side.
5. according to claim 1 or 2 described lighting devices, it is characterized in that,
Above-mentioned polarization conversion device is that the polarization conversion device of trapezoidal shape constitutes by xsect, disposes above-mentioned reflecting surface at the position corresponding to two trapezoidal sides of above-mentioned polarization conversion device.
6. according to claim 1 or 2 described lighting devices, it is characterized in that,
The maximum transverse size of above-mentioned the 2nd lens arra is set the roughly size of half of the maximum transverse size of above-mentioned the 1st lens arra for.
7. according to claim 1 or 2 described lighting devices, it is characterized in that,
The lateral dimension of the light entrance face of above-mentioned polarization conversion device is set the size roughly the same with the maximum transverse size of above-mentioned the 2nd lens arra for.
8. according to claim 1 or 2 described lighting devices, it is characterized in that,
On above-mentioned luminotron, be provided with the reflector element that the light that will inject to illuminated area side from above-mentioned luminotron reflects to above-mentioned ellipsoidal reflector.
9. projector is characterized in that possessing:
The described lighting device of in the claim 1～8 any one,
Corresponding to image information to the electro-optic modulation arrangement of modulating from the illumination light of above-mentioned lighting device and
Projection is from the projection optical system of the light modulated of above-mentioned electro-optic modulation arrangement.
10. lighting device, it possesses:
Luminotron with illuminating part of the illumination light sent,
Near the position of the illuminating part of above-mentioned luminotron and with the position of above-mentioned illuminating part, compare and be positioned at illuminated area side place, have the ellipsoidal reflector of focus respectively,
To the parallelization lens that carry out parallelization from the emitted illuminating bundle of above-mentioned ellipsoidal reflector,
To be divided into lenslet a plurality of segment beams, that make the planar rectangular shape by the illuminating bundle of above-mentioned parallelization lens institute parallelization and be arranged in the 1st rectangular lens arras that longitudinal direction and horizontal direction are respectively 7 row and 4 row,
Have the transverse width narrower than the transverse width of above-mentioned the 1st lens arra, make the each several part parallel beam cut apart by the 1st lens arra in the 2nd lens arra of systematic optical axis and
To become to have the polarization conversion device of light beam of the polarization axle of predetermined direction from the emitted each several part optical beam transformation of above-mentioned the 2nd lens arra,
It is characterized in that above-mentioned polarization conversion device has:
The 1st polarization separation portion, it comprises: to transmission the light beam of the 1st row of above-mentioned the 2nd lens arra and the 2nd row, make the single polarization separation face and the further light beam of the polarization axle of the direction that reflected by above-mentioned polarization separation face of the reflection single reflecting surface of parallel beam of polarization axle that makes it and have a side direction of light beam of the polarization axle of light beam by reflect direction of the polarization axle of direction with a side with the opposing party with the opposing party;
The 2nd polarization separation portion, it has the symmetrical shape with above-mentioned the 1st polarization separation portion, comprise: to transmission the light beam of the 3rd row of above-mentioned the 2nd lens arra and the 4th row, make the single polarization separation face and the further light beam of the polarization axle of the direction that reflected by above-mentioned polarization separation face of the reflection single reflecting surface of parallel beam of polarization axle that makes it and have a side direction of light beam of the polarization axle of light beam by reflect direction of the polarization axle of direction with a side with the opposing party with the opposing party; With
Polarizer, it is disposed at the passing through in any zone in the zone of light beam of polarization axle of the direction of passing through zone or the above-mentioned the opposing party of having of light beam of the polarization axle of above-mentioned direction with a side.
11. according to the described lighting device of claim 10, it is characterized in that,
The lenslet of above-mentioned the 1st lens arra is disposed at the matrix position the position that is listed as except the 1st row the 1st row, the 1st row the 4th row, the 7th row the 1st row and the 7th row the 4th corresponding to matrix.
12. according to claim 10 or 11 described lighting devices, it is characterized in that,
The asperratio of the above-mentioned lenslet in above-mentioned the 1st lens arra is set at longitudinal size: the ratio of lateral dimension=9: 16.
13. according to claim 10 or 11 described lighting devices, it is characterized in that,
Above-mentioned polarizer is to pass through the zone single polarizer of configuration continuously at the segment beam of the polarization axle of above-mentioned direction with a side.
14. according to claim 10 or 11 described lighting devices, it is characterized in that,
Above-mentioned polarization conversion device is that the polarization conversion device of trapezoidal shape constitutes by xsect, disposes above-mentioned reflecting surface at the position corresponding to two trapezoidal sides of above-mentioned polarization conversion device.
15. according to claim 10 or 11 described lighting devices, it is characterized in that,
The maximum transverse size of above-mentioned the 2nd lens arra is set the roughly size of half of the maximum transverse size of above-mentioned the 1st lens arra for.
16. according to claim 10 or 11 described lighting devices, it is characterized in that,
The lateral dimension of the light entrance face of above-mentioned polarization conversion device is set the size roughly the same with the maximum transverse size of above-mentioned the 2nd lens arra for.
17. according to claim 10 or 11 described lighting devices, it is characterized in that,
On above-mentioned luminotron, be provided with the reflector element that the light that will inject to illuminated area side from above-mentioned luminotron reflects to above-mentioned ellipsoidal reflector.
18. a projector is characterized in that possessing:
The described lighting device of in the claim 10～17 any one,
Corresponding to image information to the electro-optic modulation arrangement of modulating from the illumination light of above-mentioned lighting device and
Projection is from the projection optical system of the light modulated of above-mentioned electro-optic modulation arrangement.
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|---|---|---|---|
| JP2003299077 | 2003-08-22 | ||
| JP299077/2003 | 2003-08-22 | ||
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