JP2000193862A - Barrel frame capable of regulating optical system position - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a barrel frame capable of regulating the position of an optical system which is easy in adjusting the position (alignment) of the optical system of an optical member, and reducing the cost of parts. SOLUTION: The main frame 1 of a barrel frame 9 comprises an inner frame 1a to hold a lens 2, an intermediate frame 1b to which a regulation screw 6 is screwed, and an outer frame 1c to which a regulation screw 7 is screwed, and the components are connected to each other by parallel springs 1d, 1e and 1f, 1g. The inner frame 1a is displaced in the X-axis direction by screwing the regulation screw 6 in the X-axis direction, and the inner frame 1a is displaced in the Y-axis direction through the intermediate frame 1b by screwing the regulation screw 7 in the Y-axis direction, and the alignment of the optical axis O of the lens 2 can be achieved in a condition where the optical axis is not inclined.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lens frame capable of adjusting an optical system position of an optical member.

[0002]

2. Description of the Related Art With respect to a conventional lens barrel, as a lens adjustment device for correcting a shift of the center of the optical axis of a lens,
Japanese Unexamined Utility Model Publication No. 60-150511 proposes using a rotatable eccentric screw, in which a plurality of notches are provided on the outer periphery of a lens, and the eccentric screw is provided in the notch. It has an adjusting structure that is engaged. By rotating the eccentric screw, the lens can be slightly moved in a direction perpendicular to the optical axis, and the lens can be centered.

[0003]

However, the one proposed in Japanese Utility Model Laid-Open No. 150511/1985 is disadvantageous in cost because it requires a plurality of eccentric pins. In addition, in order to move the lens in a direction perpendicular to the optical axis, it is necessary to rotate a plurality of eccentric pins simultaneously or alternately. Further, depending on the supporting structure of the lens, when the eccentric pin is rotated, the optical axis of the lens is not always simply moved in parallel, and the optical axis may be inclined.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-described problem, and has as its object to provide a lens frame capable of easily adjusting the position of an optical system, in which the optical member can be easily centered.

[0005]

According to a first aspect of the present invention, there is provided a lens frame capable of adjusting the position of an optical system, comprising: an optical member; a holding member for holding the optical member; A supporting member having a deformable portion that deforms the holding member so as to be movable in a plane substantially perpendicular to the optical axis of the optical member. The position of the optical system of the member can be adjusted.

According to a second aspect of the present invention, there is provided a lens frame capable of adjusting the position of the optical system, wherein the holding member and the supporting member including the deformable portion are different from each other. , Are formed integrally.

According to a third aspect of the present invention, there is provided a lens frame capable of adjusting the position of an optical system, comprising an optical member, a holding frame for holding the optical member, and a holding frame which is substantially perpendicular to the optical axis of the optical member. 1
And a first support frame that supports the holding frame, and the holding frame is configured to be movable in a second direction substantially perpendicular to the optical axis of the optical member. And a second support frame for supporting the first support frame. The second support frame deforms the connection portion of the first support portion. The position of the optical system of the optical member can be adjusted by deforming the connecting portion.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a front view of a lens barrel capable of adjusting the position of an optical system according to a first embodiment of the present invention. FIG.
FIG. 3 is a sectional view taken along the line AOA of FIG. 1, and FIG. 3 is a perspective view showing a state where the lens barrel is inserted into a guide frame of a lens barrel.

The lens frame 9 according to the present embodiment is a lens barrel or a lens frame incorporated in an optical device, and mainly includes a lens frame main body 1 and an optical member (optical element) held by the lens frame main body. ), And cam followers 3, 4, and 5 fixed to the outer periphery of the lens barrel body 1. The lens barrel 9 allows fine adjustment (lens centering) of the optical system position of the lens 2, that is, the lens optical axis position with respect to the lens barrel body 1.

The reference for adjusting the position of the optical axis may be the outermost diameter of the lens barrel main body 1, and is selected according to the mounting state of the lens barrel to the optical apparatus. The axes orthogonal to the optical axis O of the lens 2 and passing through the center point PO in the optical axis direction of the lens 2 and orthogonal to each other are defined as an X axis (horizontal) and a Y axis (vertical).

The lens frame main body 1 has a ring-shaped inner frame 1a as a holding member for holding the lens 2 and a ring-shaped inner frame 1a as a first support frame disposed on the outer periphery thereof with a gap interposed therebetween. The frame 1b and a ring-shaped outer frame 1c, which is a second support frame disposed on the outer periphery of the frame 1b with a gap therebetween, are an integral structural member connected by a connecting portion described later. The cam followers 3, 4, and 5 are fixed to three positions on the outer periphery of the outer frame 1c.

The portion between the inner frame 1a and the middle frame 1b is a part formed integrally with the frame, and is a portion which is Y when viewed from the optical axis direction.
2 each extending in parallel in the vertical direction while straddling the axis
Parallel spring portion 1 as a first deformable plate-like connecting portion
connected by d and 1e.

Further, between the above-mentioned middle frame 1b and outer frame 1c,
It is a portion integrally formed with the frame, and is a deformable plate-shaped second connecting portion extending in the left-right direction in parallel with the X-axis as viewed in the optical axis direction. They are connected by parallel spring portions 1f and 1g.

The parallel spring portions 1d and 1e can be elastically deformed in the X-axis direction. Also, the parallel spring portion 1
f and 1g can be elastically deformed in the Y-axis direction. And
When these parallel springs are pressed in the respective directions via the screw contact portions by the adjustment screws described later, the parallel movement of the inner frame 1a or the middle frame 1b is performed without tilting with respect to the optical axis O. X
It has a substantially symmetrical shape with respect to a plane including the axis and the Y axis.

The inner frame 1b is provided with a female screw portion 1i on the X axis. The inner frame 1a is provided with a screw abutment surface 1k at a position inside the female screw 1i facing the inside, and the outer frame 1c is provided with an opening 1h for inserting an adjusting screw at a position outside the female screw portion 1i facing the outside. ing. Similarly, the outer frame 1c has Y
A female screw portion 1j is provided on the shaft, and a screw abutment surface 1m is provided on the middle frame 1b at a position facing the inside of the female screw 1j.

An adjusting screw 6 as a first adjusting member is screwed into the female screw portion 1i of the middle frame 1b through the opening 1h. An adjusting screw 7 serving as a second adjusting member is screwed into the female screw portion 1j of the outer frame 1c. The adjusting screws 6 and 7 are slotted screws.

Immediately after assembling the lens barrel 9 of the present embodiment, the initial lens optical axis position Z in the unadjusted state of the optical system position is slightly smaller in FIG. Is provided to be deviated to the upper right. The shift amount is at least larger than the adjustment amount of the lens optical axis position. This is because the adjustment is performed while maintaining the state where the tip surfaces of the adjustment screws 6 and 7 are in contact with the screw contact surfaces 1k and 1m in the adjustment range within the adjustment range.

Next, the operation of adjusting the position of the optical system of the lens frame 9 of the first embodiment configured as described above will be described. First, when adjusting the lens frame 9 alone, the outer diameter of the outer frame 1c of the lens frame main body 1 in a state where the lens 2 and the cam followers 3, 4, and 5 are assembled is held by an adjustment jig. 7 are inserted into the female screw portions 1i and 1j. While observing the detection signals from the point light source unit and the optical axis detecting CCD unit provided on the adjusting jig, screw in the adjusting screws 6 and 7 to move the initial lens optical axis position Z to the adjustment target optical axis O position. Make small adjustments. After the adjustment, the adjustment screws 6 and 7 are fixed to the female screw portions 1i and 1j with an adhesive, and the adjustment is completed.

The movement at the time of adjusting the optical axis position Z is as follows.
The parallel spring portions (deformed portions) 1d and 1e and the parallel spring portions (deformed portions) 1d and 1e are obtained by deforming in the X-axis direction and the Y-axis direction, respectively. A bending strain caused by a bending moment of the parallel spring portion and a shear strain caused by a shearing force are combined.
Further, as long as there is no readjustment of the lens frame, the deformation may use not only elastic deformation but also plastic deformation.

In the case where the lens barrel 9 is incorporated in the guide frame 8 for holding the lens frame as shown in the perspective view of FIG.
The cam follower 3 and the like are inserted into the guide grooves 8a, 8b, 8c, and are fixed to the outer frame 1c. Then, the adjusting screws 6 and 7 are adjusted from the outer peripheral side of the guide frame 8 to the adjusting openings 8d and 8e.
And inserted into the female screw portions 1i and 1j. Thereafter, the adjustment can be performed using the above-described adjustment jig in the same manner as the above-described adjustment using the lens frame alone.

According to the lens frame 9 of the first embodiment described above, since the lens frame main body 1 is of an integral structure, the structure is simple, and the position of the lens optical axis O can be adjusted by two adjusting screws. It can be done and the adjustment is very easy.
In addition, even if the position of the lens optical axis O is adjusted, the optical axis O does not tilt, and a lens frame with high optical accuracy can be obtained. Further, even when the lens frame is incorporated in a guide frame such as a cam ring, adjustment can be made through the adjustment opening from the outer periphery of the guide frame.

Note that the parallel spring portions 1d, 1e, or 1f, 1g, which are the connecting portions in the lens frame 9 of the first embodiment described above, are not in the shape of a parallel spring but in the shape of a single leaf spring, or Alternatively, a single cylindrical connecting portion may be employed. Further, the deformation at the time of adjusting the parallel spring portion is a combination of the deformation due to the bending strain and the shear strain,
A structure that adjusts using either bending strain or shear strain may be used.

Further, even if the lens 2 is formed integrally with the lens barrel main body 1, the optical system position adjusting structure of the above embodiment can be applied as it is. It is also possible to apply a screw with a locking function as the adjusting screws 6 and 7, and in this case, the bonding work after the adjustment becomes unnecessary.

Further, the parallel spring portion as the connecting portion is
Although molded integrally with the lens frame main body 1, a metal leaf spring member may be formed by insert molding with respect to the lens frame main body. In this case, the adjustment amount can be increased. Further, the lens barrel body is formed by a mold, but it is also possible to apply a press-formed metal plate.

Next, a lens frame according to a second embodiment of the present invention will be described. FIG. 4 is a front view of the lens frame of the second embodiment capable of adjusting the position of the optical system. FIG. 5 is similar to FIG.
6 is a perspective view of a state where a feed screw and a guide shaft are assembled to the lens frame.

The lens frame 10 of the present embodiment is a lens barrel or a lens frame to be mounted on an optical device, and is mainly composed of a lens frame main body 11 and an optical member (optical member) held by the lens frame main body. And a prismatic lens 12 as an element, and when incorporated in an optical device, as shown in FIG.
And the guide shaft 16 so as to be able to advance and retreat in the optical axis O direction.

Similarly, the lens frame 10 can finely adjust the position of the optical system of the lens 12, that is, the position of the lens optical axis with respect to the lens frame body 11. However, in the case of the present embodiment, the adjustment reference at the time of adjusting the position of the optical axis O is the position of the female screw portion 11k where the feed screw 15 supporting the lens frame 10 is screwed and the cutout portion where the guide shaft 16 is fitted. 11m position.

The axis is orthogonal to the optical axis O of the lens 12 and passes through the center point PO of the lens 12 in the optical axis direction.
The axes orthogonal to each other are defined as an X axis (horizontal) and a Y axis (vertical).

The lens frame main body 11 has a rectangular frame-shaped inner frame 11a as a holding member for holding the lens 12, and a channel-shaped first frame as a first support frame provided on the outer periphery thereof with a gap interposed therebetween. A middle frame 11b, and a quadrangular frame-shaped outer frame 11c as a second support frame disposed on the outer periphery thereof with a gap interposed therebetween
Are members of an integral structure connected by a connecting portion described later.

The portion between the inner frame 11a and the middle frame 11b is an integrally formed portion, and two opposing plate-shaped first portions each extending in the vertical direction on both sides around the Y axis. They are connected by parallel spring portions 11d and 11e which are connection portions.

Further, the portion between the middle frame 11b and the outer frame 11c is an integrally formed portion, and two opposed plate-like second portions each extending in the left-right direction on both sides around the X axis. Are connected by parallel spring portions 11f and 11g.

The parallel spring portions 11d and 11e are
It can be elastically deformed in the X-axis direction. The parallel spring portions 11f and 11g can be elastically deformed in the Y-axis direction. The parallel spring portions 11d and 11e, and 11f and 11g are parallel springs having shapes substantially symmetric with respect to a plane including the X axis and the Y axis, and their stiffness is also substantially equal with respect to the X axis or the Y axis. ing.

Therefore, the inner frame 11a or the middle frame 11b moves in parallel without being inclined with respect to the optical axis O when pressed in the respective directions via the abutting portions by the adjusting screws described later. Further, the lens 12 which is a prismatic lens does not rotate around the optical axis O during the deformation.

The middle frame 11b has a female screw 11 on the X axis.
i is provided. Similarly, the outer frame 11c is provided with a female screw 11j, a female screw 11k into which the feed screw 15 is screwed, and a notch 11m on the Y axis.

The female screw portion 11i of the middle frame 11b has a first
The adjusting screw 13 as an adjusting member is inserted and screwed through the opening 11h. An adjusting screw 14 serving as a second adjusting member is screwed into the female screw portion 11j of the outer frame 11c. The adjusting screws 13 and 14 are screws with slits.

The initial lens optical axis position Z immediately after assembling the lens barrel 10 of the present embodiment and in the state where the optical system position is not adjusted is the same as that of the first embodiment. It is slightly offset to the upper right in FIG. 4 from the O position.

Next, the operation of adjusting the position of the optical system of the lens frame 10 of the second embodiment having the above-described configuration will be described. When adjusting the lens frame 10, the feed screw 15 is screwed into the female screw portion 11k in a state where the lens 12 is assembled as shown in FIG. 6, and the guide shaft 16 is inserted and supported in the notch portion 11m. .

The adjusting screws 13 and 14 are inserted into the female screw portions 11i and 11j in the above-mentioned respective supporting states. As in the case of the first embodiment, the adjustment screws 13 and 14 are screwed in while observing detection signals from the point light source unit and the optical axis detection CCD unit provided on the adjustment jig, and the initial lens light is adjusted. The axis position Z is moved to the optical axis O position of the adjustment target. After the adjustment, the adjustment screws 13 and 14 are fixed to the female screw portions 11i and 11j with an adhesive, and the adjustment is completed.

The movement of the optical axis position Z is performed by deforming the parallel spring portions 11d and 11e and 11f and 11g in the X-axis direction and the Y-axis direction, respectively. As in the case of the embodiment, the bending strain and the shear strain are combined.

The lens frame 1 of the second embodiment described above.
0 has the same effect as the lens frame 9 of the first embodiment, but can be applied particularly to a lens frame to which the prismatic lens 12 is applied, and does not involve the rotational displacement or tilt of the prismatic lens 12. The optical system position can be adjusted with high accuracy in the state.

Next, a lens frame according to a third embodiment of the present invention will be described. FIG. 7 is a front view of the lens frame of the third embodiment capable of adjusting the position of the optical system. FIG. 8 is similar to FIG.
FIG. 9 is an exploded perspective view of the lens frame.

The lens frame 20 of the present embodiment is a lens barrel or a lens frame to be mounted on an optical device, and is applied particularly when there is a space margin in the optical axis direction. The lens frame 20 mainly includes a lens frame main body 21, a lens 22 that is an optical member (optical element) held by the lens frame main body, and cam followers 23, 24, and 25. And
It is also possible to adjust the optical system position of the lens 22, that is, to move the initial lens optical axis Z position to the lens optical axis O position, which is the adjustment target, with respect to the lens barrel main body 21. However, the adjustment reference of the optical axis position is based on the outer frame 2 of the lens barrel body 21.
1c.

The axes orthogonal to the optical axis O of the lens 22 and passing through the center point PO of the lens 22 in the optical axis direction and orthogonal to each other are the X axis (horizontal) and the Y axis (vertical).
And

The lens frame body 21 includes a ring-shaped inner frame 21a as a holding member for holding the lens 22, and a ring-shaped middle frame 21b as a first support frame disposed behind the inner frame 21a.
And a ring-shaped outer frame 21c which is a second support frame disposed on the outer peripheral side of the inner frame 21a. And the outer frame 21c
Cam followers 23, 24, 25
Is fixed.

The portion between the inner frame 21a and the middle frame 21b is a part formed integrally with the frame, and is a left and right deformable plate extending rearward along a plane including the optical axis O and the X axis. Are connected by spring portions 21d and 21e, which are first connection portions in the shape of a circle. However, the spring portion 21d is vertically divided into two parts.

Further, between the middle frame 21b and the outer frame 21c is a portion formed integrally with the frame, and the optical axis O
Parts 21f and 21 serving as two upper and lower deformable plate-shaped second coupling parts extending rearward along a plane including the axis and the Y axis
g.

The spring portions 21d and 21e are elastically deformable in the X-axis direction. Further, the spring portions 21f, 21g
Is elastically deformable in the Y-axis direction. And since each said spring part is formed comparatively long in the extension direction, the inner frame 21a is X-axis,
Alternatively, when pressed in the Y-axis direction, the inner frame 21a is deformed so as to move in parallel without tilting with respect to the optical axis O.

The outer frame 21c has a female screw 21 on the X axis.
i is provided, and a female screw portion 21j is provided on the Y axis.
An adjusting screw 26 serving as a first adjusting member is screwed into the female screw portion 21i. An adjusting screw 27 serving as a second adjusting member is screwed into the female screw portion 21j. The adjustment screws 26 and 27 are slotted screws.

Note that the lens barrel 20 of the present embodiment also
As in the case of the first embodiment, the initial lens optical axis position Z in the optical system position unadjusted state is provided slightly shifted to the upper right in FIG. 7 from the optical axis O position as the adjustment target. Have been. The reason for providing the shift amount in this manner is the same as in the case of the first embodiment, and is to perform the adjustment in a state where the adjustment screw is always in contact with the contact portion.

Next, the operation of adjusting the position of the optical system of the lens frame 20 of the third embodiment having the above-described configuration will be described. First, the lens 22 and the cam followers 23, 24,
Outer frame 21c of lens frame main body 21 in a state where 25 has been assembled
Is held by an adjusting jig, and the adjusting screws 26 and 27 are inserted into the female screw portions 21i and 21j. And the first
As in the case of the first embodiment, the adjustment screws 26 and 27 are screwed in while observing the detection signals from the point light source unit and the optical axis detection CCD unit provided on the adjustment jig, and the initial lens optical axis position Z is set. Move to the optical axis O position of the adjustment target. After the above adjustment, the adjusting screws 26 and 27 are fixed to the female screw portions 21i,
21j and the adjustment is terminated.

The lens frame 1 of the third embodiment described above.
0 has the same effect as the lens frame 9 of the first embodiment, but in particular, since the spring portion as the connecting portion is relatively long in the extending direction, the position of the lens optical axis O is wide. Adjustment in the range can be performed with high accuracy.

Next, a lens frame according to a fourth embodiment of the present invention will be described. FIG. 10 is a front view of a lens frame of the fourth embodiment capable of adjusting the position of the optical system. Also, FIG.
FIG. 11 is a sectional view taken along the line DOD in FIG. 10, and FIG. 12 is an exploded perspective view of the lens barrel.

The lens frame 30 of the present embodiment is a lens frame to be mounted on optical equipment, and is mainly composed of a lens frame body 31 and a lens 32 which is an optical member (optical element) held by the lens frame body.
And the cam followers 33, 34, and 35. The position of the optical system of the lens 32, that is, the initial lens is adjusted with respect to the adjustment reference of the lens frame main body 31 (for example, the outer diameter portion of the outer frame 31c). It is possible to adjust the movement to the optical axis position O which is the adjustment target of the optical axis Z position.

The axes orthogonal to the optical axis O of the lens 32 and passing through the center point PO of the lens 32 in the optical axis direction are orthogonal to the X axis (horizontal) and the Y axis (vertical).
And

The lens frame main body 31 has a ring-shaped inner frame 31a as a holding member for holding the lens 32, and a ring-shaped inner frame 31 as a first support frame provided on the outer periphery thereof with a gap interposed therebetween. The frame 31b and a ring-shaped outer frame 31c, which is a second support frame disposed around the outer periphery of the frame 31b with a gap therebetween, are members of an integral structure connected by a connecting portion described later. Note that cam followers 33, 34, and 35 are fixed at three positions on the outer periphery of the outer frame 31c.

The space between the inner frame 31a and the middle frame 31b is a part formed integrally with the frame, and extends from the front side of the inner frame 31a to the left and right positions on the X axis when viewed from the optical axis direction. Through the gap with the middle frame 31b, and are connected by spring portions 31d and 31e, which are deformable bent strip-shaped first connection portions connected to the rear surface of the middle frame 31b.

Further, the portion between the middle frame 31b and the outer frame 31c is a part formed integrally with the frame, and is located at the upper and lower positions on the Y axis when viewed from the optical axis direction, on the front side of the middle frame 31b. And is inserted through a gap with the outer frame 31c, and is connected by spring portions 31f and 31g, which are deformable bent strip-shaped second connecting portions connected to the rear surface of the outer frame 31c.

The spring portions 31d and 31e can be elastically deformed in the X-axis direction.
Is elastically deformable in the Y-axis direction. The shapes of the spring portions 31d and 31e and 31f and 31g are X
It has a symmetrical shape with respect to a plane including the axis and the Y axis, and when an abutment portion on the spring portion is pressed in each direction by an adjustment screw described later, the inner frame 31a or the middle frame 31b is moved. It is formed so as to move in parallel without tilting with respect to the optical axis O.

The inner frame 31b has a female screw 31 on the X axis.
i is provided, and an adjustment opening 31h is provided in the outer frame 31c at a position facing the female screw portion. In addition, the outer frame 31
c is provided with a female screw portion 31j on the Y axis.

An adjusting screw 36, which is a first adjusting member that can abut on the spring portion 31d, is screwed into the female screw portion 31i. Further, an adjusting screw 37 as a second adjusting member capable of abutting on the spring portion 31f is screwed into the female screw portion 31j. The adjusting screws 36 and 37 are screws with slits.

In the lens frame 30 of this embodiment, as in the case of the first embodiment, the initial lens optical axis position Z in the optical system position unadjusted state is larger than the optical axis O position of the adjustment target. In FIG. 10, it is set slightly deviated to the upper right. The reason for providing this deviation amount is to perform the adjustment in a state where the adjusting screw is always in contact with the contact portion, as in the first embodiment.

Next, the operation of adjusting the position of the optical system of the lens frame 30 of the fourth embodiment configured as described above will be described. First, the lens 32 and the cam followers 33, 34,
Outer frame 31c of lens frame main body 31 in a state where 35 is assembled
Is held by an adjusting jig, and the adjusting screws 36 and 37 are inserted into the female screw portions 31i and 31j. While observing the detection signals obtained by the point light source unit and the optical axis detecting CCD unit provided on the adjusting jig, the adjusting screws 36 and 37 are screwed in to adjust the initial lens optical axis position Z to the adjustment target optical axis O. Move to position. After the adjustment, the adjustment screws 36 and 37 are fixed to the female screw portions 31i and 31j with an adhesive, and the adjustment is completed.
The above adjustment may be performed in a state where the lens frame 30 is incorporated in a lens barrel of an optical device.

The lens frame 3 of the fourth embodiment described above.
0 has the same effect as the lens frame 9 of the first embodiment, but particularly adopts a shape that easily deforms a spring portion as a connecting portion, so that the position of the lens optical axis O is Even when the adjustment range is large, the optical system position can be adjusted with high accuracy.

Based on each of the above-described embodiments, (1) an adjustment mechanism having an optical element and a parallel spring capable of moving the optical element on a plane orthogonal to the optical axis of the optical element (A screw and a support member) can be proposed.

(2) An optical member, a holding member for holding the optical member, and a supporting member for supporting the holding member, wherein the holding member is movable and displaceable in a plane substantially perpendicular to the optical axis of the optical member. A support member having a deformable portion that deforms so as to perform the adjustment, and an adjusting member that moves and displaces the holding member with respect to the support member by abutting the holding member when performing adjustment to deform the deformable portion. ,
It is possible to propose a lens frame capable of adjusting the position of the optical system, comprising:

(3) The lens frame according to (2) above, wherein the holding member and the supporting member including the deformed portion are integrally formed. Can be.

(4) The above (2) or (3), wherein the deformed portion is formed of an elastic member.
Can be proposed.

(5) The lens frame as described in (2) above, wherein the holding member and the support member are connected by a deforming portion comprising a mechanism having a parallel spring. Can be suggested.

(6) An optical member, a holding frame for holding the optical member, and a first connecting portion for deforming the holding frame so as to be movable in a first direction substantially perpendicular to the optical axis of the optical member. A first support frame for supporting the holding frame, and a second connecting portion for deforming the holding frame so as to be movable in a second direction substantially perpendicular to an optical axis of the optical member; A second support frame that supports the first support frame including a holding frame; and a second support frame that is provided on the first support frame so as to be operable to be adjusted. A first adjusting member for moving and displacing the holding frame with respect to the first support frame by deforming the connecting portion; and a first adjusting member provided on the second support frame so as to be adjustable. By deforming the second connecting portion by abutting on the first support frame, the second support frame is deformed. Then, a second adjusting member for moving and displacing the first support frame including the holding frame can be proposed.

(7) The above (6), wherein the holding frame, the first and second support frames, and the first and second connecting portions are integrally formed. )
A mirror frame capable of adjusting the optical system position described above can be proposed.

(8) The lens frame according to (7) above, wherein the first and second connecting portions are formed so as to be elastically deformable. it can.

(9) The above-mentioned (6), wherein the first direction and the second direction are substantially perpendicular to each other on a plane substantially perpendicular to the optical axis of the optical member. ) Can be proposed.

(10) The first connecting portion and the second connecting portion are arranged on two lines passing through the optical axis in a plane substantially perpendicular to the optical axis of the optical member. It is possible to propose a lens frame capable of adjusting the position of the optical system according to the above (6), wherein the lens frame is arranged.

According to the present invention, the above-described position adjustment can be performed in a state where the inclination of the optical axis is extremely small, and the structure is simple and the cost of parts can be reduced.

[0075]

As described above, according to the lens frame of the present invention in which the position of the optical system can be adjusted, a lens frame in which the position of the optical system of the optical member can be easily adjusted (centered) can be provided.

[Brief description of the drawings]

FIG. 1 is a front view of a lens barrel capable of adjusting an optical system position according to a first embodiment of the present invention.

FIG. 2 is a sectional view taken along line AOA of FIG. 1;

FIG. 3 is a perspective view showing a state where the lens barrel of the first embodiment is inserted into a guide frame of a lens barrel.

FIG. 4 is a front view of a lens frame capable of adjusting an optical system position according to a second embodiment of the present invention.

FIG. 5 is a cross-sectional view taken along the line BOB of FIG. 4;

FIG. 6 is a perspective view showing a state where a feed screw and a guide shaft are assembled to the lens barrel of the second embodiment.

FIG. 7 is a front view of a lens barrel capable of adjusting an optical system position according to a third embodiment of the present invention.

FIG. 8 is a sectional view taken along the line CC of FIG. 7;

FIG. 9 is an exploded perspective view of the lens barrel of the third embodiment.

FIG. 10 is a front view of a lens barrel capable of adjusting the position of an optical system according to a fourth embodiment of the present invention.

FIG. 11 is a sectional view taken along the line DOD of FIG. 10;

FIG. 12 is an exploded perspective view of a lens barrel according to the fourth embodiment.

[Explanation of symbols]

2, 12, 22, 32 ... Lens (optical member) 1a, 11a, 21a, 31a ... Inner frame (holding member for holding optical member) 1b, 11b, 21b, 31b ... Middle frame (supporting member, 1c, 11c, 21c, 31c... Outer frame (support member, second support member) 1d, 1e, 1f, 1g, 11d, 11e, 11f, 1
1g Parallel spring portion (connecting portion, deformed portion, elastic member) 21d, 21e, 21f, 21g, 31d, 31e, 3
1f, 31g ... spring part (connection part, deformation part, elastic member)

Claims (3)

[Claims] 1. An optical member, a holding member for holding the optical member, and a supporting member for supporting the holding member, wherein the holding member is adjusted in a plane substantially perpendicular to the optical axis of the optical member during adjustment. And a support member having a deformable portion that is movably deformed. 2. The lens frame according to claim 1, wherein the holding member and the supporting member including the deformable portion are formed integrally. 3. An optical member, a holding frame for holding the optical member, and a connecting portion for deforming the holding frame movably in a first direction substantially perpendicular to an optical axis of the optical member, A first support frame that supports the holding frame; and a connecting portion that deforms the holding frame so as to be movable in a second direction that is substantially perpendicular to the optical axis of the optical member, and supports the first support frame. And a second support frame, wherein: a mirror frame capable of adjusting the position of the optical system.