JPH10268173A - Optical adjustment mechanism - Google Patents

Abstract

PROBLEM TO BE SOLVED: To inexpensively provide an optical adjustment mechanism capable of improving adjusting workability, regarding an optical member having a linear guide mechanism. SOLUTION: The slide coupling part 3a of an eccentric shaft 3 is coupled to a slide coupling hole 2a formed on a holding member 2 having an optical member held thereon. The eccentric shaft 3 has a coupling and fixing part 3b at one end of the slide coupling part 3a, and the coupling and fixing part 3b is held in the fixing and coupling hole 4a of a support member 4. Also, the coupling and fixing part 3b has an axial line eccentric from the axial line of the slide coupling part 3a. On the other hand, the other end of the eccentric shaft 3 is held in the fixing and coupling hole 4 of the support member 4. Also, a non-eccentric shaft 6 is coupled to a slide groove formed on the holding member 2, and secured to the fixing and coupling holes 4c and 4d of the holding member 4 with set screws. Then, the eccentric shaft 3 is rotated around the coupling and fixing part 3b, thereby adjusting the inclination of the optical axis of the optical member.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to an optical adjustment mechanism for an optical member in the field of optical instruments, and more particularly to an optical adjustment mechanism suitable for optical adjustment of an optical member having a linear guide mechanism.

[0002]

2. Description of the Related Art A generally known mechanism for moving an optical member having a linear guide mechanism using a shaft will be described with reference to FIGS. 20 and 21. FIG. The illustrated mechanism is a mechanism that allows the optical member to move in the horizontal direction. FIG. 20 is an exploded perspective view schematically showing the mechanism, and FIG. 21 is a sectional view of an assembled state.

In FIG. 1, reference numeral 21 denotes an optical member, and reference numeral 22 denotes a holding member for holding the optical member 21. The holding member 22 has sliding fitting holes 22a and 22b at upper and lower sides opposite to the side where the optical member 21 is held, and U-shaped sliding grooves 22c and 22d opened at the lower surface of the holding member 22, respectively. Direction. Guide shafts 23 and 24 are fitted in the sliding fitting holes 22a and 22b and the sliding grooves 22c and 22d, respectively. A fixed fitting portion 23 coaxial with the guide shafts 23, 24 is provided at one end of the guide shafts 23, 24.
a and 24a are respectively protruded, and fixed fitting portions 23b and 24b having the same diameter as the guide shafts 23 and 24 are provided at the other end. The guide shafts 23 and 24 are fixed to a guide shaft fixing member 25. The guide shaft fixing member 25 has fixed fitting holes 25a, 25b and 25c, 2
5d, the fixed fitting portions 23a, 24a of the guide shafts 23, 24 are fitted into the fixed fitting holes 25a, 25c, respectively, and the fixed fitting portions 23b, 24b are fitted into the fixed fitting holes 25b, 25d. , Respectively, and the fixing screws 26
By fixing the fixed fitting portions 23a, 23b, 24a, 24b to the guide shaft fixing member 27 by the
3, 24 are arranged in parallel.

In the above configuration, the optical path can be switched by moving the holding member 22 and the optical member 21 in the axial direction of the guide shafts 23 and 24.

Further, as a moving mechanism using another shaft, a mechanism shown in a perspective view of FIGS. 22 to 25 is known. FIGS. 22 and 23 show a mechanism in which two guide shafts for guiding a holding member for holding an optical member and the like are set in a horizontal direction. In FIG. 22, the holding member 31
The sliding fitting holes 31a, 31 into which the guide shaft 32 on the reference side that determines the moving direction of the holding member 31 is slidably fitted.
b, and U-shaped sliding grooves 31c and 31d for slidably receiving the other guide shaft 33 are provided. Both ends of each of the two guide shafts 32 and 33 are fixed to a guide shaft fixing member 34. Rising portions are formed on both sides of the guide shaft fixing member 34, and four L-shaped portions 34 a, 34 b, and 3 are formed by cutting out the opposing ridges of the rising portions.
4c and 34d are formed. L-shaped parts 34a, 34b
The ends of the guide shaft 32 are respectively applied to the ends of the guide shaft 32, and the ends of the guide shaft 33 are applied to the L-shaped portions 34c and 34d. , 34c, 34d and the both ends arranged on the upper surface of the rising portion of the guide shaft fixing member 34 are clamped by a fixing member 35 bent in a dogleg shape, and the fixing member 35 is fixed to the guide shaft fixing member 34 by fixing screws 36. By fixing, the two guide shafts 32 and 33 are fixed to the guide shaft fixing member 34.

In the above configuration, the guide shafts 32, 33 are provided with the sliding fitting holes 31a, 31b and the U-shaped sliding grooves 31c, 31c.
The holding member 31 is connected to the two guide shafts 3 while the upper surface of each of the holding members 31 d is applied by the weight of the holding member 31.
Move along 2,33.

[0007] The configuration shown in FIG.
Four V-grooves 34a, 34b, 34c, 34d are provided at the rising portion of the guide shaft fixing member 34 supporting the
Both ends of each of the guide shafts 32 and 33 are V-grooves 34a,
It is placed on 34b, 34c, 34d, and the fixing member 35 is fixed to the guide shaft fixing member 34 by the fixing screw 36, whereby the upper surfaces of the two guide shafts 32, 33 are pressed and fixed to the guide shaft fixing member 34. ing.

FIGS. 24 and 25 show a mechanism in which two guide shafts for guiding a holding member for holding an optical member and the like are set in a vertical direction. In FIG. 24, a holding member 31 such as an optical member has a reference side sliding fitting hole 3 at its upper part.
1a, 31b are provided, and U-shaped sliding grooves 31c, 31d are provided in the lower part.
c and 31d are opened on the lower surface side of the holding member 31.
A guide shaft 32 is fitted in the sliding fitting holes 31a and 31b, and a guide shaft 33 is disposed in the sliding grooves 31c and 31d.

The guide shaft fixing member 34 is provided with L-shaped portions 34a, 34b, 34c and 34d in a stepwise manner.
The ends of the guide shaft 32 on the reference side are mounted on the reference shafts 4a and 34b, respectively, and the ends of the other guide shafts 33 are mounted on the L-shaped portions 34c and 34d, respectively.
Are fixed to the guide shaft fixing member 34 by fixing screws 36, respectively, so that the bent end of the fixing member 35
The two guide shafts 32, 33 are pressed against the L-shaped portions 34a to 34d, and the two guide shafts 32, 33 are fixed to the guide shaft fixing member 3.
It is fixed to 4.

In such a configuration, FIGS.
Unlike the configuration set in the horizontal direction shown in FIG.
With its own weight of 1 or the like, the guide shaft 33 does not come into contact with the U-shaped sliding grooves 31c and 31d of the holding member 31 and the position of the holding member 31 is not determined. For example, as shown in FIG. As shown in FIG. 24, the holding member 37c and the pressing member 37 using the leaf spring 37a
1 and the leaf spring 3 via the bearing 37c.
7, one side of the sliding grooves 31c and 31d is pressed against the guide shaft 33 to perform positioning.

In FIG. 25, both ends of a guide shaft 32 fitted into the sliding fitting holes 31a, 31b on the reference side of the holding member 31 and a guide shaft 33 for receiving U-shaped sliding grooves 31c, 31d are provided. Fixed fitting hole 34 provided in guide shaft fixing member 34
a and 34b and fixed fitting holes 34c and 34d, respectively, and are fixed to the guide shaft fixing member 34 by fixing members 38 and fixing screws 39, respectively.

In each of the above configurations, the sliding fitting portions of the guide shafts 32 and 33 for slidably fitting the holding member 31 and the fixing of the guide shafts 32 and 33 fixed to the guide shaft fixing member 34. The part is configured coaxially.

[0013]

However, in the configuration of the prior art, depending on variations in the processing accuracy of the optical member, the holding member, the guide shaft, and the guide shaft fixing member and errors in assembly,
The optical axis may be tilted from its original position, or may be shifted in the horizontal and vertical directions. Therefore, it is necessary to correct this. However, if a mechanism for adjusting the position of the optical member is provided, the mechanism becomes complicated, and the cost of both the member and the assembly increases. In addition, a large space for the mechanism is required. For this reason, in general, optical adjustment is not performed at an optical member having a linear guide mechanism, and optical adjustment is performed at another optical member. However, in this case, the optical misalignment caused in the optical member having the linear guide mechanism is adjusted in other parts, so that the mechanism for optical adjustment and adjustment work become complicated, or the optical adjustment is completely performed. Adjustment may not be possible.

Further, when the guide portion of the guide shaft fitted to the holding member and the fixing portion of the guide shaft fixed to the guide shaft fixing member are coaxial, the guide portions of the two guide shafts are coplanar. If it is not disposed above, the holding member that moves while being guided by the two guide shafts cannot slide with respect to the guide shafts in the entire movement range. That is,
If there is a twist between the two guide shafts, the sliding resistance between the guide shafts and the holding member increases, and the holding member becomes clogged and stops during the movement, which hinders the function as a guide. Become.

Also, a fitting hole and a U-shaped sliding groove of a holding member for receiving the sliding fitting portion of the guide shaft, an L-shaped portion of the guide shaft fixing member for supporting the guide shaft fixing portion, and a V-shaped portion are provided. Since the mold part or the fitting hole is determined by the processing accuracy, there is also a problem in the performance due to the positional accuracy (parallelism) in the entire moving range of the holding member.

For this reason, in the configuration of the prior art, the position correction of the holding member and the twist correction between the two guide shafts are performed by the configuration shown in FIG. As shown in FIG. 27A, when the fixing portions of the two guide shafts 51 and 52 are fixed by four (two are not shown) L-shaped portions of the guide shaft fixing member 53, the guide shafts 51 and 52 are fixed. The fixed portion 52 is supported in a state of contacting the contact surfaces 53a and 53b of each L-shaped portion. Therefore, by inserting a hook between the fixing portions of the guide shafts 51 and 52 and the contact surfaces 53a and 53b, the guide shafts 51 and 52 can be moved and tilted in any direction.

However, the shank is fixed to the fixing portion 53
In order to insert the guide shaft between the guide shaft fixing members 53a and 53b, the guide shaft must be once removed from the guide shaft fixing member 53. Further, since the required adjustment amount cannot be continuously obtained by the adjustment by the shank, the adjustment is required. The work has to be repeated, and the adjustment work takes a long time, and there is a limit in accuracy due to the thickness of the shank.

As shown in FIG. 27 (b), when the fixing portions of the guide shafts 54, 55 are fixed by the fitting holes 56a, 56b provided in the guide shaft fixing member 56, the fitting holes 5
6b is formed in an elongated hole so that the fixed portion of the guide shaft 55 can be moved in the radial direction, and an adjusting screw 57 is provided in the longitudinal direction of the elongated hole, and the position of the guide shaft 55 is continuously adjusted by the advance and retreat of the adjusting screw 57. Making it possible.

However, in the method of adjusting with the adjusting screw 57, it takes time to take the adjusting screw 57 in and out.
When correcting the absolute position of the holding member guided by the guide shafts 54 and 55, both of the fitting holes 56a and 56b for fixing both ends of the guide shafts 54 and 55 have to be elongated holes. Setting becomes very difficult.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems of the prior art, and provides an optical member having a linear guide mechanism, which is small, inexpensive, and can improve the adjustment workability. The purpose is to do.

[0021]

According to a first aspect of the present invention, there is provided an optical adjustment mechanism, comprising: an optical member; a holding member for holding the optical member; At least one of the guide shafts in an optical member linear guide mechanism having two guide shafts having a sliding fitting portion slidably supporting the two guide shafts and a main body supporting the two guide shafts. A fixed portion held by the main body is provided on at least one end side of the sliding fitting portion of the guide shaft, and the axis of the fixed portion and the axis of the sliding fitting portion are eccentric. .

According to a second aspect of the present invention, there is provided an optical adjustment mechanism comprising: an optical member; a holding member for holding the optical member; and a guide shaft for slidably supporting the holding member in the axial direction. In a linear guide mechanism having a main body provided with a guide shaft fixing portion for fixing one end of the guide shaft,
A guide shaft moving and fixing member movably fixed to the main body and fixing the other end of the guide shaft; and a position adjusting means for adjusting a fixing position of the guide shaft moving and fixing member with respect to the main body. .

Next, the operation of the present invention will be described. Claim 1
According to the invention, when the guide shaft having the eccentric sliding fitting portion and the fixed portion is rotated around the fixed portion while being supported by the main body, the sliding fitting portion corresponds to the rotation amount of the fixed portion. To move the holding member and the optical member through the hole of the holding member to perform optical adjustment.

According to the second aspect of the present invention, the holding member for holding the optical member is slidably held along the guide shaft by the linear guide mechanism. The fixed position of one end of the guide shaft can be adjusted with respect to the main body by position adjusting means. The direction of the guide shaft is adjusted by the position adjusting means, and the inclination of the holding member supported by the guide shaft is adjusted.

[0025]

BEST MODE FOR CARRYING OUT THE INVENTION

[First Embodiment] A first embodiment of the present invention will be described with reference to FIGS. 1 to 3 show a first embodiment of the present invention.
1 is an exploded perspective view, FIG. 2 is a front sectional view, and FIG. 3 is a side sectional view.

In FIG. 1, reference numeral 1 denotes an optical member, which is fixed to the holding member 2 by bonding or the like. The holding member 2 is provided with sliding fitting holes 2a and 2b at the same height.
Sliding grooves 2c and 2d are provided below a and 2b.
The sliding grooves 2 c and 2 d are formed in a U-shape that is opened on the lower surface of the holding member 2.

An eccentric guide shaft 3 is fitted in the sliding fitting holes 2a and 2b of the holding member 2, and movably holds the holding member 2. The eccentric guide shaft 3 is provided with a sliding fitting portion 3a that fits into the sliding fitting holes 2a and 2b of the holding member 2, and a fixed fitting portion 3b for fixing to the main body 4. The fixed fitting portion 3b is formed in a cylindrical shape and protrudes from one end surface of the sliding fitting portion 3a, and the cylindrical shaft of the fixed fitting portion 3b is aligned with the cylindrical shaft of the sliding fitting portion 3a. The eccentricity is provided. A slot 3c is provided on the end face of the eccentric guide shaft 3 on the side opposite to the side on which the fixed fitting portion 3b is provided. The fixed fitting portion 3b of the eccentric guide shaft 3 is fitted in a fixed fitting hole 4a of the main body 4, and is fixed from outside the main body 4 by a fixing screw 5. In the case of FIG. 1, the fixed fitting portion 3b
It is fixed so as to be eccentric upward with respect to the sliding fitting portion 3a. The end of the eccentric guide shaft 3 on the side where the slot 3c is provided is inserted into the fixing hole 4b of the main body 4 so that a slight gap is provided between the end of the eccentric guide shaft 3 and the fixing hole 4b. While being fixed from the outside of the main body 4 by a fixing screw 5.

An eccentric guide shaft 6 is fitted in the sliding grooves 2c and 2d of the holding member 2. The eccentric guide shaft 6
Sliding fitting portion 6 fitted into sliding grooves 2c and 2d of holding member 2
a, and a fixed fitting portion 6b for fixing to the main body 4. The fixed fitting portion 6b is formed in a cylindrical shape, and is provided so as to protrude from one end surface of the sliding fitting portion 6a, and the cylindrical shaft of the fixed fitting portion 6b is aligned with the cylindrical shaft of the sliding fitting portion 6a. It is provided with no eccentricity. A slot 6c is provided on the end face of the non-eccentric guide shaft 6 on the side opposite to the side on which the fixed fitting portion 6b is provided. The fixed fitting portion 6b of the non-eccentric guide shaft 6 is fitted into a fixed fitting hole 4c of the main body 4, and is fixed from outside the main body 4 by a fixing screw 5. The end of the non-eccentric guide shaft 6 on the side where the slot 6c is provided is inserted into a fixing hole 4d of the main body 4 and is fixed from outside the main body 4 by a fixing screw 5.

Next, the operation of the above configuration will be described with reference to FIG. First, as shown in FIG. 3A, from the state where the fixed fitting portion 3b of the eccentric guide shaft 3 is eccentric upward (initial state), the slot 3c of the eccentric guide shaft 3 (FIG. , 2) and a flat member such as a flathead screwdriver is inserted, and the eccentric guide shaft 3 is rotated in the direction of arrow L. At this time, the eccentric guide shaft 3 has a cylindrical axis of the fixed fitting portion 3b which is eccentric upward with respect to a cylindrical axis of the sliding fitting portion 3a. Moves to the upper right. Accordingly, the axes of the sliding fitting holes 2a and 2b of the holding member 2 also move in the upper right direction, and the optical member 1 fixed to the holding member 2 also moves, as shown in FIG. The holding member 2 and the optical member 1 are inclined. Here, FIG.
When there is a reflecting surface 1a as shown in (a) and (b), the optical axis 7 of the light beam incident from below the optical member 1 and reflected by the reflecting surface 1a moves in the m direction, and the inclination of the optical axis 7 Adjustment is possible. Similarly, when the eccentric guide shaft 3 is rotated in the R direction, the optical axis 7 of the light beam reflected by the reflection surface 1a of the optical member 1 moves in the n direction, and the inclination of the optical axis 7 can be adjusted. Become. After the optical member 1 is moved as described above, the tilt is adjusted by moving the optical axis 7 in the m or n direction as shown in FIG. 3C, and the optical adjustment is performed. 1,2
Eccentric guide shaft 3 is fixed to the main body 4.

According to the first embodiment of the present invention, optical adjustment can be continuously performed while the eccentric guide shaft 3 is supported by the fixed fitting holes 4a and 4b provided in the main body 4.

In the above configuration, the eccentric guide shaft 3 is fitted into the sliding fitting holes 2a, 2b of the holding member 2, and the non-eccentric guide shaft 6 is fitted into the sliding grooves 2c, 2d. The eccentric guide shaft 3 is fitted in the sliding grooves 2c and 2d,
The eccentric guide shaft 6 may be configured to be fitted in the sliding fitting holes 2a, 2b. At this time, the eccentric guide shaft 3 is
When rotated in the direction of arrow L in (a), the optical axis 7 of the light beam reflected by the reflecting surface 1a of the optical member 1 moves in the n direction.

Further, the eccentric guide shaft 3 and the non-eccentric guide shaft 6 adjust the diameter of the sliding fitting portions 3a, 6a to the fixed fitting portion 3.
Although the case where the diameter is larger than the diameters of b and 6b is shown, the diameter of the fixed fitting parts 3b and 6b may be larger than the diameter of the sliding fitting parts 3a and 6a. Further, the eccentric guide shaft 3 and the non-eccentric guide shaft 6 may be configured by providing fixed fitting portions 3b and 6b at both ends.

[Second Embodiment] A second embodiment of the present invention will be described with reference to FIG. FIG. 4 shows Embodiment 2 of the present invention.
FIG. 4 is a side sectional view showing the optical adjustment mechanism of FIG.

In the first embodiment of the present invention, the eccentric guide shaft 3 and the non-eccentric guide shaft 6 are used as the two guide shafts for guiding the holding member 2, but the optical adjustment according to the second embodiment of the present invention. In the mechanism, the two eccentric guide shafts 3 are the same as in the first embodiment.
It constituted using. That is, the eccentric guide shaft 3 is fitted into the sliding fitting holes 2a and 2b and the sliding grooves 2c and 2d of the holding member 2, and the fitting fixing portion 3b is eccentric upward to fix the guide shaft. Are fixed to the fixed fitting holes 4a and 4c provided in the main body 4. Other configurations are the same as those of the first embodiment, and the same members are denoted by the same reference numerals and description thereof will be omitted.

In Embodiment 2 of the present invention, FIG.
As shown in (a), the fixed fitting portion 3b of the eccentric guide shaft 3
When the two eccentric guide shafts 3 are rotated in the arrow L direction or the arrow R direction by the same angle in the same manner as in the first embodiment from the state where the eccentricity is eccentric upward (initial state), the holding member 2 , The optical member 1 moves in the direction of the arrow X or Y, and the optical axis 7 of the light beam reflected by the reflection surface 1a of the optical member 1 also moves in the direction of the arrow X or Y. After optical adjustment is performed by moving the optical axis 7 in the X direction or the Y direction as described above, the eccentric guide shafts 3 are fixed to the main body 4 by the fixing screws 5. When one of the two eccentric guide shafts 3 and 3 is rotated, the optical axis 7 from the optical member 1 can be moved in the m direction or the n direction as in the first embodiment. Further, by giving different rotations to the two eccentric guide shafts 3, 3, the optical member 1
It is possible to adjust the inclination and height of the optical axis 7 of the luminous flux exiting from the luminous flux, thereby enabling more complicated optical adjustment.

According to the second embodiment of the present invention, in addition to the effects of the first embodiment, the height of the optical axis can be adjusted.

In the structure of the second embodiment,
The eccentric guide shaft 3 adjusts the diameter of the sliding fitting portion 3 a to the fixed fitting portion 3.
Although the case where it is larger than the diameter of b is illustrated, the diameter of the fixed fitting portions 3b and 6b may be configured to be larger than the diameter of the sliding fitting portion 3a. Further, the eccentric guide shaft 3 may be provided with fixed fitting portions 3b at both ends.

Further, in the structure of the first and second embodiments of the present invention, the sliding grooves 2c and 2d provided in the holding member 2 are formed by sliding the sliding fitting holes like the sliding fitting holes 2a and 2b. And the fixed fitting holes 4c and 4d of the main body 4 can be configured as elongated hole fitting portions having a long axis in the vertical direction. And effects can be obtained.

Third Embodiment A third embodiment of the present invention will be described with reference to FIG. FIG. 5 shows Embodiment 3 of the present invention.
It is a perspective view which shows the concept of.

In the third embodiment of the present invention, the eccentric guide shaft 13 is fitted into the U-shaped sliding groove 12b of the holding member 12 for fixing the optical member 11, and the holding member 12 is slidably fitted. Hole 12
The non-eccentric guide shaft 16 is fitted into the a. As shown in FIG. 6, the eccentric guide shaft 13 has a sliding fitting portion 13a fitted into the sliding groove 12b of the holding member 12, and fixed fitting portions projecting from both ends of the sliding fitting portion 13a. 13b is provided. The sliding fitting portion 13a and the fixed fitting portion 13b are connected to the axis 13c of the sliding fitting portion 13a and the axis 1 of the fixed fitting portion 13b.
3d is eccentric, and the axis 13c and the axis 13d are inclined at an angle θ. The fixed fitting portions 13b are fixed to fixing fitting holes 14c and 14d provided in the main body 14 for fixing the guide shaft, respectively, with fixing screws 15. On the other hand, the non-eccentric guide shaft 16 is
a fixed fitting portions provided at both ends of the main body 14 are fixed fitting holes 1
4a and 14b are fixed by fixing screws 15.

Next, the operation of the third embodiment of the present invention will be described with reference to FIG.
A description will be given with reference to FIG. 7 is a side sectional view showing the holding member and the guide shaft of the optical adjustment mechanism, and FIG. 8 is a bottom sectional view showing the holding member and the eccentric guide shaft.
(A), FIG. 7 (c) and FIG. 8 (b), and FIG. 7 (d) and FIG. 8 (c), respectively.

The holding member 12 is provided with a non-eccentric guide shaft 16 on the reference side in a sliding fitting hole 12a for performing two-dimensional positioning (positioning in the vertical and horizontal directions in FIG. 7) except for the moving direction of the holding member 12. Are fitted and the sliding member 13a of the eccentric guide shaft 13 on the subordinate side abuts on the one surface 12c of the U-shaped sliding groove 12b by the pressing member 17, and the holding member 12 is The eccentric guide shaft 16 is movable in the axial direction. The pressing member 17 has the same configuration as the pressing member 37 of FIG. 26 described in the related art.

Next, the sliding fitting portion 1 of the non-eccentric guide shaft 16
The twist correction in the case where the sliding fitting portion 13a of the eccentric guide shaft 13 is not parallel to the eccentric guide shaft 13 will be described.
Here, the axis 13c of the fitting sliding portion of the eccentric guide shaft 13 on the subordinate side has an angle θ (see FIG. 8A) with respect to the axis of the non-eccentric guide shaft 16 on the reference side. Is in a twisted state in a direction (direction B in FIG. 7A) orthogonal to the side surface of. In such a state, when the holding member 12 moves along the two guide shafts 13 and 16, the holding member gets clogged and stops. However, two guide shafts 1
When the twisted state of 3, 16 is in the direction parallel to the side surface of the sliding groove 12b (A direction in FIG. 7A), the sliding groove 12b
Is formed in a U-shape, so that it does not hinder the movement of the holding member 12. Therefore, as shown in FIGS. 7B, 7C, and 8A and 8B, the eccentric guide shaft 13 is rotated about the point C in the direction of arrow D, and the non-eccentric guide shaft 16 is rotated.
7A and the axis 13c of the eccentric guide shaft 13 are shown in FIG.
In the direction A. Thereby, the twisting state that hinders the movement of the holding member 12 is eliminated, and the function of the holding member 12 in the desired moving direction is not impaired. That is, the two guide shafts 13 and 1 are provided with an inclination in advance between the axis 13c of the sliding fitting portion 13a of the eccentric guide shaft 13 and the axis 13d of the fixed fitting portion 13b.
6, torsion correction becomes possible.

According to the third embodiment of the present invention, the fixed fitting hole 14 is centered on the fitting fixed portion 13b of the eccentric guide shaft 13.
c and 14d, the eccentric guide shaft 13 is rotated.
Is rotated, and the axis 13c of the sliding fitting portion of the eccentric guide shaft 13 is rotated.
It is possible to freely correct the inclination of the eccentric guide shaft 13 so as not to hinder the movement of the holding member 12 within the range of the angle θ formed between the shaft and the axis 13d of the fitting fixing portion 13b, that is, within the range of 0 to θ. it can.

In the third embodiment, the case where the eccentric guide shaft 13 is fitted in the sliding groove 12b of the holding member 12 has been described. The non-eccentric guide shaft 16 is fitted into the mating hole 12a and
2b. In this case, the inclination correction of the absolute position of the holding member 12 can be performed only in one of the directions A and B in FIG.

As shown in FIG. 6, the eccentric guide shaft 13 has a configuration in which the diameter of the sliding fitting portion 13a is larger than the diameter of the fixed fitting portion 13b, as shown in FIG. Thus, the diameter of the sliding fitting portion 13a can be made smaller than the diameter of the fixed fitting portion 13b.

Fourth Embodiment A fourth embodiment of the present invention will be described with reference to FIG. FIG. 10 shows an optical adjustment mechanism according to a fourth embodiment of the present invention. FIG. 10 (a) is a side sectional view, FIG. 10 (b) is a front view, and FIG. 10 (c) is a bottom view.

In the fourth embodiment of the present invention, the eccentric guide shaft 13 configured in the same manner as the third embodiment is fitted into both the sliding fitting hole 12a and the sliding groove 12b of the holding member 12. It is configured. The two eccentric guide shafts 13 are fixed fitting holes 14a, 1 provided in the main body 14 for fixing the guide shafts with the fitting fixing portions 13b eccentric in the same direction.
4b and the fixed fitting holes 14c and 14d are fixed by fixing screws 15. Other configurations are the same as those of the third embodiment.
The same members are denoted by the same reference numerals, and description thereof will be omitted.

The operation of the fourth embodiment of the present invention will be described.
In the present embodiment, the inclination correction of the absolute position of the holding member 12 and the twist correction of the two guide shafts 13 can be performed.

The position correction of the holding member 12 is described with reference to FIG.
It is possible to correct the tilt in either the direction of arrow A or the direction of arrow B shown in FIG. 0 (a), and the other position is not guaranteed. That is, the eccentric guide shaft 1 is fixed in the fixed fitting holes 14a, 14b, 14c, 14d of the main body 14.
By rotating the eccentric guide shaft 13 by rotating the fixed fitting portion 13b of FIG. 3, the holding member 12 is required to be tilted at only one of the arrows A and B in FIG. (See FIGS. 10B and 10C). Also, by taking a sufficiently large inclination between the sliding fitting portion 13a and the fixed fitting portion 13b of the eccentric guide shaft 13, the eccentric guide shaft 13 fitted into the sliding groove 12b of the holding member 12 can correct the position. With respect to the other eccentric guide shaft 13 (the eccentric guide shaft fitted into the sliding fitting hole 12a of the holding member 12), further twist correction can be performed.

[Fifth Embodiment] A fifth embodiment of the present invention will be described with reference to FIGS. 11 to 13 show an optical adjustment mechanism according to the fifth embodiment. FIG. 11 is a front sectional view, FIG. 12 is a right side view, and FIG. 13 is a front sectional view showing a state after adjustment.

In the fifth embodiment of the present invention, the guide shaft for slidably holding the holding member 62 of the optical member 61 is two non-eccentric guide shafts 63 (hereinafter, referred to as guide shafts 63).
Each guide shaft 63 is attached to a guide shaft fixing portion 64a of a main body 64 that movably holds the optical member 61 held by the holding member 62.
Is fixed, and the other end is fixed to a guide shaft moving fixing member 64b provided so as to be position adjustable with respect to the main body 64.

The main body 64 has a guide shaft fixing portion 64a and a guide shaft moving fixing member 64b arranged opposite to each other. The guide shaft fixing portion 64a is formed integrally with the main body 64, and the guide shaft moving fixing member 64b is fixed to the main body 64 by fixing screws 65.

An optical element 67 is attached to the guide shaft fixing portion 64a.
A lens insertion hole 68 for fitting and supporting (hereinafter, referred to as a first lens 67) is formed, and a fitting fixing hole 69 for fixing the fixing fitting portion 63a of the guide shaft 63 is provided at a peripheral portion of the lens inserting hole 68 ( Two are formed in the vertical direction in the figure. Each fitting fixing hole 69 is formed slightly larger than the diameter of the fixing fitting portion 63a of the guide shaft 63, and
3 can be adjusted. Guide shaft fixing screws 70 are screwed into the guide shaft fixing portions 64a from above and below the guide shaft fixing portions 64a. The guide shaft fixing screw 70 is tightened to fit the fixing hole 69.
The fixing fitting portion 63a of the guide shaft 63 inserted into the fitting fixing hole 69 can be inserted into the guide shaft fixing portion 64a.
Fixed to The guide axis 63 is the optical axis 77 of the first lens 67
Are set substantially in parallel.

The guide shaft moving / fixing member 64b has a vertically long hole 71 formed therein, and is fixed to the main body 64 by the fixing screw 65 penetrating the long hole 71, so that the position can be adjusted vertically. ing. The guide shaft moving fixing member 64b has a through hole 72 and a fitting fixing hole 73 for fixing the fixing fitting portion 63b of the guide shaft 63, and a lens insertion hole 68 formed in the guide shaft fixing portion 64a and a fitting fixation. The guide shaft fixing portion 6 is formed so as to face the hole 69.
4a allows the two guide shafts 63 to be held in parallel. Each fitting fixing hole 73 is formed slightly larger than the diameter of the fixing fitting portion 63b of the guide shaft 63, and allows the inclination of the guide shaft 63 to be adjusted. Further, similarly to the guide shaft fixing portion 64a, a guide shaft fixing screw 74 is screwed into the guide shaft moving fixing member 64b from above and below, and the fixed fitting portion 63b of the guide shaft is fixed to the guide shaft moving fixing member 64b. Fix it.

The holding member 62 is formed with two fitting sliding holes 75a and 75b which are slidably fitted to the two guide shafts 63. Hole 75
The fitting sliding portions 63c of the guide shafts 63 are fitted into the guide shafts 63a and 75b, and are slidably held in the axial direction of the guide shafts 63. The fitting slide hole 75a is fitted to the guide shaft 63 without play at a level that does not affect the optical performance, and the fit slide hole 75b is fitted with slight play to the guide shaft 63. I agree. The holding member 62 has a fitting sliding hole 75.
An optical element 61 (hereinafter, referred to as a second lens 61) is fixed to a lens insertion hole 76 formed between the lenses 75a and 75b by, for example, bonding. The holding member 62 is controlled to move in the axial direction of the guide shaft 63 by a driving mechanism such as a cam (not shown), thereby displacing the distance between the first lens 67 and the second lens 61 to change the zoom magnification, for example. And for changing the focal position.

FIGS. 11 and 13 show the operation of this embodiment.
It will be described based on. In the state where the optical adjustment device according to the present embodiment is assembled, FIG.
As shown in (2), the second lens 61 is assembled with its optical axis 78 inclined at an angle α1 with respect to the optical axis 77 of the first lens 67. Here, variations in the dimensions of each component are considered as deviations of the parallelism of the fitting fixing hole 69 with respect to the lens inserting hole 68 of the guide shaft fixing portion 64a and the lens inserting hole with respect to the fitting sliding hole 75a of the holding member 62. 76, or the fitting sliding hole 75a of the holding member 62
And the guide shaft 63 is loosely fitted.

Therefore, as shown in FIG.
The optical axis 78 of the second lens 61 is at an angle with respect to the optical axis 77 of 67.
When it is inclined downward by α1, the fixing screw 65 and the guide
The guide shaft fixing screw 74 is loosened and the guide shaft is moved with respect to the main body 64.
The moving fixing member 64b is moved in the arrow Y direction. Guide shaft
The guide shaft 63 moves up according to the amount of movement of the movable fixing member 64b.
Holding member 62 tilted toward
And the second lens 61 is also inclined. Then, the second lens 61
Of the optical axis 78 of the first lens 67
The parallel position, that is, the guide shaft 63 is
When it is inclined by angle α1 with respect to the direction of
65 and the main body 64 and the guide shaft moving fixing member 64
b and the guide shaft fixing screw 74
To move the guide fixing member 64a and the guide shaft.
The fixing member 64b and the guide shaft 63 are integrally connected.
In this state, the holding member 62 is moved along the guide shaft 63.
However, the optical axis 78 of the second lens 61 is always
7 is held in an ideally parallel state with respect to the optical axis 77.
Further, the guide shaft 63 is angled α.₁Just tilt and fix
As shown in FIG. 14, the distance between the two guide shafts 63 is
Separation a is acos α ₁It will change to
Sliding hole 75b formed in material 62 and guide shaft 63
The backlash is absorbed between the shafts, and the holding member 62 is
It can move smoothly along 63. In addition,
The optical axis 78 of the second lens 76 is tilted upward with respect to the optical axis 77.
When the guide shaft moving fixing member 64b is
It is only necessary to move in the opposite direction.

According to the embodiment of the present invention, the optical element 61 held by the holding member 62 is simply moved by moving the guide shaft moving fixing member 64b formed separately with respect to the main body 64.
Can be adjusted. Further, the adjustment operation can be performed simply by loosening and tightening the fixing screw 65 and the guide shaft fixing screw 74, so that the adjustment operation can be easily performed. Further, since a certain one component is preliminarily divided into two parts and adjusted, there is no need to provide a special inclination adjusting mechanism for the holding member 62 holding the optical element 61, and the cost is reduced and the holding member 62 is downsized. That is, the size of the adjustment mechanism can be reduced.

In this embodiment, the elongated hole 71 is provided in the up and down direction so that the guide shaft moving fixing member 64b can be moved only in the arrow Y direction and can be adjusted. However, the present invention is not limited to this. If a round hole larger than the screw diameter of the fixing screw 65 is formed instead of the long hole 71, an arrow X shown in FIG.
The direction can also be adjustable. by this,
Even if the two guide shafts 63 are twisted with respect to each other, the two guide shafts can be rotated by slightly rotating the guide shaft moving and fixing member 64 a in a plane perpendicular to the optical axis 77 and fixing them with the fixing screws 65. The torsion state of the shaft 63 can be corrected.

Sixth Embodiment A sixth embodiment of the present invention will be described with reference to FIGS. 15 to 17 show an optical adjustment mechanism according to the sixth embodiment. FIG. 15 is a front sectional view, FIG. 16 is a right side view, and FIG. 17 is a front sectional view showing a state after adjustment.

In this embodiment, a fixed fitting portion 83 of two non-eccentric guide shafts 83 (hereinafter, referred to as a guide shaft 83) that guides the holding member 62 slidably by the fitting sliding portion 83c.
a and 83b are formed in a spherical shape. The fixed fitting portion 83a is provided in the fitting fixed hole 6 of the guide shaft fixing portion 64a.
9 and fixed to the guide shaft fixing screw 70,
The fixed fitting portion 83b is fixed to a fitting fixing hole 73 of the guide shaft moving and fixing member 64b by a guide shaft fixing screw 74,
The guide shafts 83 are arranged substantially in parallel. Other configurations are the same as those of the fifth embodiment, and the same members are denoted by the same reference numerals and description thereof will be omitted.

FIGS. 15 and 17 show the operation of the present embodiment.
It will be described based on. In the state where the optical adjustment device of the present embodiment is assembled, the optical axis 78 of the second lens 61 is shifted to the first lens 67 as shown in FIG. In the case of assembling with the optical axis 77 inclined by a certain angle α2, the fixing screw 65 and the guide shaft fixing screw 74 are loosened and the guide shaft is moved and fixed with respect to the main body 64 as in the fifth embodiment. Member 6
4b is moved in the direction of arrow Y to move to a position where the optical axis 77 and the optical axis 78 are exactly parallel. And fixed screw 6
5, the main body 64 and the guide shaft moving fixing member 64b
And the guide shaft fixing screw 74 is tightened to integrally connect the guide shaft 83 with the guide shaft fixing portion 64a and the guide shaft moving and fixing member 64b. Even if the holding member 62 is moved along the guide shaft 83 in this state, the optical axis 78 of the second lens 61 always keeps the first lens 67
Is maintained in an ideally parallel state with respect to the optical axis 77 of the optical disk.

According to the embodiment of the present invention, the following effects can be obtained in addition to the effects of the fifth embodiment. That is, since the fitting and fixing portions 83a and 83b of the guide shaft 83 are spherical, even if the guide shaft 83 is tilted when the tilt of the first lens 61 is adjusted, the fitting and fixing portions 83a and 83b and the fitting and fixing holes 69 and Adjustment can be performed smoothly without causing twisting between the members 73. Therefore, even if the guide shaft 83 is fixed after the adjustment, no distortion such as bending occurs in the guide shaft 83, and the guide shaft 83 can be firmly connected to the guide shaft fixing portion 64a and the guide shaft rotation fixing member 64b.
An optical adjustment mechanism with high durability against external vibrations and shocks can be obtained.

In the present embodiment, similarly to the first embodiment, the elongated hole 71 is provided in the vertical direction so that the guide shaft moving fixing member 64b can be moved only in the arrow Y direction and can be adjusted. However, the present invention is not limited to this. If a round hole larger than the screw diameter of the fixing screw 65 is formed instead of the long hole 71, the adjustment can be made in the arrow X direction shown in FIG.

[Seventh Embodiment] A seventh embodiment of the present invention will be described with reference to FIGS. 18 and 19 show an optical adjustment mechanism according to the seventh embodiment.
Is a front sectional view, and FIG. 19 is a front sectional view showing a state after adjustment.

In this embodiment, a fixed fitting portion 93 of two non-eccentric guide shafts 93 (hereinafter, referred to as guide shafts 93) for guiding the holding member 62 slidably by the fitting sliding portions 93c.
A groove 94 is formed in each of the grooves a and 93b, and an O-ring 95 made of an elastic material such as rubber is fitted into each groove 94. The fixed fitting portion 93a is press-fitted into the fitting fixing hole 69 of the guide shaft fixing portion 64a via the O-ring 95, and the fixed fitting portion 93b is fitted into the fitting fixing hole 73 of the guide shaft moving fixing member 64b. It is press-fitted via a ring 95. That is, the fixed fitting portions 93a and 93b of the two guide shafts 93 are fixed to the guide shaft fixing portion 64a and the guide shaft moving fixing member 64b by the elastic force of the O-ring 95, respectively, and the optical axis 77 of the second lens 67. And are arranged substantially in parallel. Other configurations are the same as those of the fifth embodiment.
The same members are denoted by the same reference numerals, and description thereof will be omitted.

FIGS. 18 and 19 show the operation of the present embodiment.
It will be described based on. When the optical adjustment device of the present embodiment is assembled, the optical axis 78 of the second lens 61 is shifted from the first lens 67 as shown in FIG. When the optical axis 77 is assembled at a certain angle α3 with respect to the optical axis 77, the fixing screw 65 is loosened, and the guide shaft moving and fixing member 64b is moved in the direction of the arrow Y with respect to the main body 64. It moves to a position where the optical axis 78 is exactly parallel. Then, the fixing screw 65 is tightened, and the guide shaft moving fixing member 64 is fixed to the main body 64.
b are integrally joined. At this time, the guide shaft fixing portion 64
a and the guide shaft moving and fixing member 64b and the guide shaft 93 are fixed by the elastic force of the O-ring 95. Further, since the elastic force of the O-ring 95 is further utilized, even if the guide shaft 93 is inclined with respect to the fitting fixing holes 69 and 73, the O-ring 95 is deformed so that the fixed state of the guide shaft 93 is ensured well. Is done.

According to the embodiment of the present invention, the following effects can be obtained in addition to the effects of the fifth embodiment. That is, since an elastic body such as the O-ring 95 is used as the fixing means of the guide shaft 93, when the guide shaft 93 is fixed, work such as screw tightening becomes unnecessary, and the assembling work is simplified. Further, since no external force such as a fixing force of a screw is applied to the guide shaft 93, the guide shaft 9 is not affected by the external force.
No distortion such as bending occurs in 3.

The present specification includes the invention having the following configuration. (1) A holding member, and two guide shafts having a sliding fitting portion that fits into holes and grooves provided in the holding member and capable of moving the optical member and the holding member in the axial direction, and two guide shafts. An optical adjustment mechanism comprising a main body supporting the guide shaft, wherein at both ends of the slide fitting portion of the guide shaft, a fixing portion having an axis inclined with respect to the axis of the sliding fitting portion is provided, An optical adjustment mechanism, wherein a fixing portion is held by a fitting hole provided in the main body.

(2) The optical adjustment mechanism according to the above configuration (1), wherein both the guide shafts are rotated with respect to the main body to correct the inclination of the holding member with respect to the main body.

(3) The optical adjustment mechanism according to the above configuration (1), wherein one of the guide shafts is rotated with respect to the main body to perform a twist correction between the two guide shafts.

(4) The above-mentioned structure characterized in that a guide shaft in which the axis of the fixed part and the axis of the sliding fitting part are eccentric is fitted into one of the holes or grooves provided in the holding member. The optical adjustment mechanism according to (1).

(5) The above structure wherein a guide shaft having the axis of the fixed portion and the axis of the sliding fitting portion eccentric is fitted into both the hole and the groove provided in the holding member. (1)
3. The optical adjustment mechanism according to 1.

According to the above configurations (1) to (5), the optical adjustment of the optical member having the linear guide can be easily performed without increasing the number of parts. That is, simply by rotating the guide shaft when fixing it to the main body, correction of the position of the holding member (inclination in any one-dimensional direction) and correction of twist between the guide shafts can be easily realized. .

[0076]

As described above, according to the first aspect of the present invention,
According to the optical adjustment mechanism of the above, in the optical member having the linear guide mechanism of the optical member, the optical adjustment is continuously performed only by rotating the guide shaft having the eccentric fixed portion around the fixed portion. Since it can be performed, it is possible to provide an optical member optical adjustment mechanism that can improve the adjustment work at low cost.

According to the optical adjustment mechanism of the second aspect of the present invention, the guide shaft moving / fixing member is moved by the position adjusting means, and the guide shaft for supporting the holding member in the axial direction is moved. An optical adjustment mechanism capable of optically adjusting the optical member can be provided.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view showing Embodiment 1 of the present invention.

FIG. 2 is a front sectional view showing the first embodiment of the present invention.

FIG. 3 is a side sectional view showing the first embodiment of the present invention.

FIG. 4 is a side sectional view showing Embodiment 2 of the present invention.

FIG. 5 is a perspective view showing the concept of Embodiment 3 of the present invention.

FIG. 6 is a front view showing an eccentric guide shaft according to a third embodiment of the present invention.

FIG. 7 is a side sectional view showing Embodiment 3 of the present invention.

FIG. 8 is a bottom sectional view showing Embodiment 3 of the present invention.

FIG. 9 is a front view showing another eccentric guide shaft according to the third embodiment of the present invention.

FIG. 10 shows a fourth embodiment of the present invention, and FIG.
Is a sectional side view, FIG. 10B is a front view, and FIG. 10C is a bottom view.

FIG. 11 is a front sectional view showing a fifth embodiment of the present invention.

FIG. 12 is a right side view showing the fifth embodiment of the present invention.

FIG. 13 is a sectional view showing a state after adjustment according to the fifth embodiment of the present invention.

FIG. 14 is a diagram for explaining the operation of the fifth embodiment of the present invention.

FIG. 15 is a front sectional view showing a sixth embodiment of the present invention.

FIG. 16 is a right side view showing the sixth embodiment of the present invention.

FIG. 17 is a sectional view showing a state after adjustment according to the sixth embodiment of the present invention.

FIG. 18 is a front sectional view showing a seventh embodiment of the present invention.

FIG. 19 is a sectional view showing a state after adjustment according to the seventh embodiment of the present invention.

FIG. 20 is an exploded perspective view showing a conventional technique.

FIG. 21 is a front sectional view showing a conventional technique.

FIG. 22 is an exploded perspective view showing a conventional technique.

FIG. 23 is an exploded perspective view showing a conventional technique.

FIG. 24 is an exploded perspective view showing a conventional technique.

FIG. 25 is an exploded perspective view showing a conventional technique.

FIG. 26 is a side view showing a conventional pressing member.

FIG. 27 is an explanatory diagram for describing a conventional optical adjustment method.

[Explanation of symbols]

1,61 Optical member 2 Holding member 2a, 2b Sliding fitting hole 2c, 2d Sliding groove 3 Eccentric guide shaft 3a Sliding fitting part 3b Fixed fitting part 4, 14, 64 Main body 4a, 4c Fixed fitting Hole 4b, 4d Fixing hole 5 Fixing screw 6 Non-eccentric guide shaft 6a Sliding fitting portion 6b Fixed fitting portion 7 Optical axis 11 Optical member 12 Holding member 12a Sliding fitting hole 12b Sliding groove 13 Eccentric guide shaft 13a Sliding fitting portion 13b Fixed fitting portion 14 Guide shaft fixing portion 14a, 14b, 14c, 14d Fixed fitting hole 15 Fixing screw 16 Non-centered guide shaft 62 Holding member 63, 83, 93 Guide shaft 63a, 63b, 83a, 83b, 93a, 93b Fixed fitting portion 64a Guide shaft fixing portion 64b Guide shaft moving fixing member 65 Fixing screw 69, 73 Fitting fixing hole 70, 74 Guide shaft fixing screw 71 Elongated hole 75a, 7 5b Fitting sliding hole 95 O-ring

Continued on the front page. (72) Inventor Asagi Ishikawa 2-43-2 Hatagaya, Shibuya-ku, Tokyo Inside Olympus Optical Co., Ltd. (72) Inventor Shun-ichiro Takahashi 2-43-2 Hatagaya, Shibuya-ku, Tokyo Olympus Within Optical Industry Co., Ltd. (72) Inventor Tsutomu Kobayashi 2-43-2 Hatagaya, Shibuya-ku, Tokyo Olympus Optical Industry Co., Ltd. (72) Takeshi Okada 2-43-2 Hatagaya, Shibuya-ku, Tokyo Olympus Inside Optical Industry Co., Ltd. (72) Inventor Hiroshi Odashima 2-43-2 Hatagaya, Shibuya-ku, Tokyo Inside Olympus Optical Industry Co., Ltd.

Claims (2)

[Claims] An optical member, a holding member for holding the optical member, two guide shafts having a sliding fitting portion for slidably supporting the holding member along the axial direction, In a linear guide mechanism of an optical member having a main body that supports the guide shaft, at least one of the guide shafts is fixed to the main body at least at one end side of a sliding fitting portion of the guide shaft. And an axis of the fixed part and an axis of the sliding fitting part are eccentric. 2. An optical member, a holding member for holding the optical member, a guide shaft for slidably supporting the holding member in the axial direction, and a guide shaft fixing portion for fixing one end of the guide shaft. In a linear guide mechanism having a main body provided with a guide shaft moving fixed member movably fixed to the main body and fixing the other end of the guide shaft, a fixing position of the guide shaft moving fixed member with respect to the main body is set. An optical adjustment mechanism, comprising: a position adjusting means for adjusting.