JP2002196205A - Optical equipment - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide optical equipment constituted so that the deviation of an optical axis can be accurately corrected with simple constitution. SOLUTION: The equipment is provided with a coupling member 145 coupling a 1st element holding member 109 and a 2nd element holding member 118 in a state where the optical axis orthogonal end face 109d of the member 109 and the optical axis orthogonal end face 118a of the member 118 abut on each other, an energizing member 120 arranged between the member 145 and the member 118 and generating energizing force for pressing the member 118 to the member 109 in an optical axis direction at least in an imperfectly coupled state by the member 145, and adjusting mechanisms 146 and 109e arranged between the members 109 and 118 and relatively positionally adjusting the members 109 and 118 along the optical axis orthogonal end face in the imperfectly coupled state.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to an optical device such as a lens barrel including an element holding member for holding an optical element.
More specifically, the present invention relates to an optical device assembled by connecting first and second element holding members in an optical axis direction.

[0002]

2. Description of the Related Art As a structure for holding an optical element in an optical apparatus as described above, there is one proposed in, for example, Japanese Patent Application Laid-Open No. 11-21959.

In this holding structure, when assembling a plurality of element holding members each holding an optical element (such as a lens) in the direction of the optical axis and assembling them, the optical axis shift of each optical element due to a manufacturing error is corrected. In order to adjust the relative position in the direction orthogonal to the optical axis with the element holding members in contact with each other in the optical axis direction, each element holding member is held by a dedicated adjustment jig. The relative position between the element holding members is determined by directly using the external biasing force of the jig.

[0004]

However, in the optical apparatus proposed in the above publication, when the adjusting jig is removed after the relative positions of the element holding members are determined, the position of the element holding member is generated during the position adjustment. The deformation of the element holding member is released in a direction to alleviate the stress caused by the deformation, and the position of the optical element is moved, so that it is difficult to correct the optical axis shift with high accuracy.

SUMMARY OF THE INVENTION It is an object of the present invention to provide an optical apparatus capable of accurately correcting an optical axis shift with a simple configuration.

[0006]

According to the present invention, there is provided an optical apparatus comprising first and second element holding members which are coupled to each other in an optical axis direction and hold optical elements, respectively. A joining member for joining the first and second element holding members in a state where the optical axis orthogonal end face of the first element holding member and the optical axis orthogonal end face of the second element holding member are in contact with each other; A second element holding member disposed between the coupling member and the second element holding member for pressing the second element holding member against the first element holding member in the optical axis direction at least in an incompletely coupled state by the coupling member; An urging member capable of generating an urging force, disposed between the first and second element holding members,
An adjusting mechanism is provided for relatively adjusting the position of the first and second element holding members along the optical axis orthogonal end surface in the incompletely coupled state.

That is, the second element holding member is moved to the first position by the urging force of the urging member in an incompletely connected state by the coupling member.
Of the first and second element holding members in the incompletely connected state by an adjusting mechanism configured between the first and second element holding members. The relative positioning of the element holding members in the direction orthogonal to the optical axis is performed.

As a result, the relative position of each element holding member can be adjusted (that is, the light can be adjusted with high accuracy) without the trouble caused by the deformation of the parts as in the case of using an adjusting jig for applying a biasing force from the outside of the apparatus as in the prior art. (Correction of axial misalignment) can be performed, and the first and second element holding members can be integrally assembled while maintaining the above-described relative positional relationship by continuing the connection by the connecting member.

The adjusting mechanism is, for example, attached to one of the first and second element holding members so as to be rotatable about a rotation axis extending in a direction orthogonal to the optical axis. An eccentric member having a peripheral surface eccentric with respect to the axis, and two surfaces formed on the other element holding member and parallel to the optical axis direction sandwiching the peripheral surface of the eccentric member. You may.

[0010] The first and second connecting members may be used.
A screw for fastening the element holding member may be used, and a spring washer sandwiched between the screw and the second element holding member may be used as the biasing member.

Further, at a plurality of circumferential positions of a portion for holding the optical element in the first element holding member, extending portions are formed extending in the optical axis direction and connected to the tip thereof for connecting the second element holding member. If so, a deformation preventing member is provided between the coupling member and the second element holding member to engage with the tips of the plurality of extending portions and prevent deformation of these extending portions. You may.

Thus, it is possible to prevent the accuracy of correcting the optical axis shift from being deteriorated due to the deformation of the first element holding member.

Further, a friction reducing member is provided between the connecting member and the second element holding member to reduce the occurrence of friction between the connecting member and the second element holding member in the process of connecting the connecting members. It is desirable to dispose the second element holding member to prevent deterioration of the optical axis deviation correction accuracy due to deformation of the second element holding member.

The deformation preventing member and the friction reducing member are
The first element holding member is prevented from moving in a plane orthogonal to the optical axis in an incompletely connected state by the connecting member, and moves together with the two element holding members in the optical device after being assembled. By configuring the movable portion, it is possible to reliably prevent the first and second element holding members from being deformed without applying a force from outside the device.

Further, the friction reducing member also serves as the deformation preventing member, and the urging member is disposed between the coupling member and the deformation preventing member or the friction preventing member, so that the deformation of the parts can be efficiently performed with a simple structure. It is desirable to prevent

[0016]

FIG. 1 shows the internal structure of an interchangeable lens (optical apparatus) for a single-lens reflex camera according to an embodiment of the present invention.

This interchangeable lens includes first to sixth lens units L
1 to L6, and all the lenses L1 to L6 move in the optical axis direction by the zoom operation.
The second group lens L2 moves in the optical axis direction by the focus operation. At this time, the third lens unit L3 and the sixth lens unit L6 move integrally, and the fifth lens unit L5 moves in the direction orthogonal to the optical axis in order to perform a shake correction operation separately from the movement in the optical axis direction. Also move.

Reference numeral 101 denotes a mount, which has a bayonet portion for attaching to a camera body, and is fixed to a fixed barrel 102 with screws.

Reference numeral 103 denotes an outer ring which is sandwiched and fixed between the mount 101 and the fixed cylinder 102. Scale window 104, name plate 105, SW
A panel 106 is attached. SW panel 106
By switching the switches provided in the, it is possible to select and use functions such as auto focus and shake correction.

Reference numeral 107 denotes a guide tube, which forms a fixed portion with respect to the camera body by fixing the fixed tube 102 with screws. The outer periphery of the guide cylinder 107 is fitted with a cam cylinder 108 that can be rotated only around the optical axis by bayonet coupling. Thus, when the cam barrel 108 is rotated, the third point follows the movement of the intersection of the guide groove in the optical axis direction provided in the guide barrel 107 and the cam groove provided in the cam barrel 108.
The third group holding frame 109 for holding the group lens L3, the fourth group holding frame 110 for holding the fourth group lens L4, the shake correction unit 111 and the rectilinear barrel 112 are illuminated via rollers 113 to 116 respectively screwed. It can be moved in the axial direction.

The third group holding frame 109 is screwed with an electromagnetic diaphragm unit 117 composed of a diaphragm driving unit and a diaphragm blade. The extension 109 of the third group holding frame 109
At the rear end of “a”, a sixth group holding frame 118 for holding the sixth group lens L6 is screwed together with a reinforcing plate 119 and a spring washer 120 with a screw 145.

A hook is provided at the front end of the fourth-group holding frame 110, and a movable aperture 121 for determining an open aperture and cutting off harmful light is elastically connected to the hook from the front. . Thereby, the third group holding frame 109
Diaphragm 121 and fourth-group holding frame 11 with
It is easy to combine with 0.

The shake correcting unit 111 holds the fifth lens unit L5 so as to be drivable in the direction orthogonal to the optical axis, and the fifth lens unit L5 is driven by a driving unit including a magnet and a coil.
The group lens L5 is driven. A filter frame 122 is screwed to the rectilinear barrel 112.

A bayonet portion is provided on the outer periphery of the distal end of the filter frame 122, and a screw portion is provided on the inner periphery, so that accessories such as a hood and a filter can be attached.

A first group holding frame 123 for holding the first group lens L1 is screwed to the filter frame 122. The contact portions of the filter frame 122 and the first group holding frame 123 are each formed in a slope shape extending in the circumferential direction.
By rotating the first-group holding frame 123 and attaching it to the filter frame 122, it is possible to select a mounting position of the first-group holding frame 123 with respect to the filter frame 122 in the optical axis direction. As a result, it is possible to correct the deviation between the focal positions on the wide-angle side and the telephoto side due to manufacturing errors.

Reference numeral 124 denotes a makeup ring on which a display such as a lens name is printed on the front surface. Reference numeral 125 denotes a focus unit which is screwed to the guide cylinder 107. The focus unit 125 is mainly composed of a vibration type motor and a differential mechanism, and the focus key 12 according to the rotation amount of the rotor of the vibration type motor and the rotation amount of the manual ring 126.
7 is output.

A gyro substrate 129 to which a pair of vibrating gyros 128 for detecting angular velocities in horizontal and vertical directions is soldered is provided in front of the focus unit 125.
Are screwed via rubber dampers (not shown).

An encoder flexible substrate 130 on which a gray code pattern is formed is attached to the outer periphery of the projection extending from the focus unit 125 in an arc shape.

Further, a projection is provided on the front side of the focus unit 125 where the vibrating gyroscope 128 and the encoder flexible board 130 are not provided, and a roller 131 is screwed to this projection.

Reference numeral 132 denotes a zoom operation ring, in which the roller 131 is engaged with a groove provided in the circumferential direction, so that only rotation about the optical axis is possible in a state where movement in the optical axis direction is prevented. I have.

A cam cylinder 1 is provided on the inner periphery of the zoom operation ring 132.
A recess is formed in which the zoom key 133 screwed to the 08 engages. Thus, the cam barrel 108 can be rotated integrally with the zoom operation ring 132 via the zoom key 133.

Reference numeral 134 denotes an intermediate cylinder, on the outer periphery of which a projection engaging with a groove extending in the optical axis direction provided on the inner periphery of the zoom operation ring 132 is provided. A lead groove with which the provided protrusion is engaged is formed. Therefore, the intermediate cylinder 134 rotates integrally with the zoom operation ring 132, and advances and retreats in the optical axis direction according to the position of the zoom operation ring 132 in the rotation direction and the position of the filter frame 122 in the optical axis direction.

In the interchangeable lens of the present embodiment, the vibration gyro 128 is arranged at a position away from the camera body (in front of the focus unit 125), so that the vibration generated by the camera body (shutter curtain running and mirror up / down movement). The vibration gyro 128 is hardly transmitted to the vibration gyro 128, and does not require a conventionally used method such as housing in a case.

Further, by providing the positioning portion of the zoom operation ring 132 in the optical axis direction at a phase where the vibration gyro 128 is not provided, the vibration gyro can be arranged without increasing the lens outer diameter. I have. With these techniques, miniaturization of the present interchangeable lens has been achieved.

Reference numeral 135 denotes a zoom rubber wound around the outer periphery of the zoom operation ring 132. Reference numeral 136 denotes a zoom operation ring 132.
Is a name ring elastically connected to the front end of the name ring.

Reference numeral 137 denotes a zoom brush screwed to the zoom operation ring 132.
It is used to detect the positional relationship between the zoom operation ring 132 and the encoder flexible substrate 130 by sliding on the 0 gray code pattern.

Reference numeral 138 denotes an inner cam cylinder, and a roller 139 is screwed via a coil spring. This roller 13
9 is a cam groove provided on the guide cylinder 107 and the cam cylinder 1
08 engages with the optical axis direction groove. Therefore, the inner cam barrel 138 advances and retreats in the optical axis direction while rotating integrally with the cam barrel 108.

Reference numeral 140 denotes a second group holding frame for holding the second group lens L2.
38 is engaged with a cam groove provided on an inner periphery of the cam 38. Also,
The key portion extending from the second group holding frame 140 is engaged with the focus key 127 so as to rotate integrally therewith. Therefore, when the cam barrel 108 rotates (the focus key 127 stops), the second group holding frame 140 moves to the inner cam barrel 138.
In the optical axis direction by the sum of the amount of movement in the optical axis direction and the amount of change in the optical axis direction of the engagement point due to the rotation of the cam groove of the inner cam barrel 138.

When the focus key 127 is rotated (the cam barrel 108 is stopped), the focus key 127 moves forward and backward in accordance with the amount of change in the optical axis direction at the point of engagement with the cam groove of the inner cam barrel 138 while rotating.

In the interchangeable lens according to the present embodiment, these mechanisms are used to mechanically correct the focal position shift due to a change in the focal length in the inner focus, and the second group lens L
2 is moved back and forth in the optical axis direction.

Reference numeral 141 denotes a scale sheet, which rotates integrally with a focus key 127 which is an output of the focus unit 125, and displays a focus position together with the scale window 104.

Reference numeral 142 denotes a main board which is electrically connected to the focus unit 125, the electromagnetic diaphragm unit 117, the shake correction unit 111, the gyro board 129, and the encoder flexible board 130 via a flexible board or directly. Perform control.

143 is screwed to the mount 101,
The contact block is connected to the main board 142 via a flexible board, and is provided for communication with the camera body and power supply. 144 is a back cover,
The harmful light is cut by being elastically coupled to the mount 101.

Reference numeral 146 denotes an eccentric roller having a rotating shaft portion 146a and a roller portion 146b each having an eccentric central axis. The shaft portion 146a of the eccentric roller 146 is press-fitted into a roller shaft hole 118d provided in a roller receiving portion 118c of the sixth group holding frame 118, and is rotatably held without coming off. It is engaged with the elongated hole 109e in the optical axis direction provided on the extension 109a of the group holding frame 109.

In the interchangeable lens configured as described above,
When the zoom operation ring 132 is rotated, the zoom key 133
, The cam barrel 108 rotates, and all the lenses L1 to L6 advance and retreat in the optical axis direction according to the above mechanism, thereby performing zooming. At this time, the third group lens L3 and the sixth group lens L6 move forward and backward integrally.

On the other hand, the focus key 127 is rotated by driving the vibration type motor during auto focus and by rotating the manual ring 126 during manual focus. Thereby, the second group lens L2 moves forward and backward according to the above mechanism, and focusing can be performed.

During the shake correction operation, the output of the vibration gyro 128 and the encoder flexible substrate 130
The shake correction unit 111 is controlled in accordance with the output of
The group lens L5 is driven in a direction orthogonal to the optical axis in a direction to cancel the movement of the image on the film surface due to the generated shake.

Next, the third and sixth lens units L3, L
The lens holding structure for holding and integrally connecting the lenses 6 will be described in detail with reference to FIG.

In this lens holding structure, of the components described with reference to FIG. 1, the mount 101, the outer ring 103, the manual ring 126, the main board 142, the back cover 144, and the components fixed thereto are fixed before being assembled. Cylinder 1
02 is fixed to the adjustment jig body (not shown),
The sixth group holding frame (second element holding member) 118 holding the group lens L6 is replaced with the third group holding frame (first element holding member) 109 holding the third group lens L3. On the other hand, adjust the position in the direction orthogonal to the optical axis and attach it.

Thus, the first to sixth lens units L1 to L1
A desired optical performance can be obtained by correcting the deterioration of the optical performance caused by the manufacturing error of L6 and the parts holding them.

The third group holding frame 109 has three extending portions 109a extending from the cylindrical portion holding the third lens unit L3 to the rear of the lens via a flange portion. Each of the extending portions 109a has a slot 109e extending in the optical axis direction as described above.
Is formed at the front end in the extending direction, that is, at the rear end, at the contact surface 1 with the sixth-group holding frame 118 which is an end surface orthogonal to the optical axis.
09b, a screw prepared hole 109d, and a pair of columnar projections 1
09c is provided.

The sixth group lens L in the sixth group holding frame 118
In the outer periphery of the cylindrical portion that holds the third lens unit 6, at three positions corresponding to the contact surface 109 b of the third group holding frame 109 and the screw prepared hole portion 109 d, the contact surface with the third group holding frame 109 and the screw hole are formed. A flange portion 118a provided with a portion 118b is formed.

Each extension 109 of the third group holding frame 109
roller receiving portions 118c to be located on the inner diameter side of
The eccentric roller 146 is formed in the roller shaft hole 118d formed in
Of the rotary shaft portion 146a is press-fitted, whereby the eccentric roller 146 is rotatably held in the third group holding frame 109 without coming off. Further, the peripheral surface of the roller portion 146b having a center axis different from the rotation shaft portion 146a is
09 are engaged with two inner surfaces parallel to the optical axis direction in a long hole portion 109e provided in the extension portion 109a.

A reinforcing plate (a deformation preventing member,
The friction reducing member 119 has an annular shape,
At three positions corresponding to the screw lower hole 109d and the cylindrical protrusion 109c of the third group holding frame 109, the screw hole 11 is provided.
9a, a round hole 119b and an elongated hole 119c are formed respectively.

The lens holding structure constituted by these components is assembled as follows.

First, the contact surface 109b of the third-group holding frame 109
The front end face (the end face orthogonal to the optical axis) of the flange portion 118a of the sixth-group holding frame 118 is abutted against the second group holding frame 118.

Next, with the reinforcing plate 119 in contact with the rear end face of the flange portion 118a of the sixth group holding frame 118, a spring washer (biasing member) 12 around the screw shaft portion is provided.
The three flange portions 118a of the sixth-group holding frame 118 are screwed to the three extending portions 109a of the third-group holding frame 109 by self-tapping screws (connection members) 145 to which the "0" is attached. I do.

As a result, all the components are integrated into one movable part in the interchangeable lens.

Next, correction of the optical axis shift between the third group lens L3 and the sixth group lens L6 in the present lens holding structure will be described. The optical axis shift correction is performed in a state where the screw 145 is partially tightened, that is, the sixth group holding frame 118 is replaced with the third group holding frame 1
09 is not completely fixed, but the sixth group holding frame 118 is pressed against the third group holding frame 109 via the reinforcing plate 119 by the spring force (biasing force) of the spring washer 120 (refer to claims). (Incompletely connected state).

At this time, as described above, the sixth group holding frame 1
The rotation shaft portion 146a of the eccentric roller 146 is press-fitted and fixed in the roller shaft hole portion 118d of each roller receiving portion 118c, and the peripheral surface of the roller portion 146b is the optical axis in the long hole portion 109e of the third group holding frame 109. It engages two inner surfaces parallel to the direction.

Therefore, the roller shaft hole 1 of the sixth group holding frame 118
When the eccentric roller 146 is rotated about 18d, the roller 146b moves in the optical axis direction in the elongated hole 109e of the third-group holding frame 109, and the shaft 146a is eccentric about the roller 146b. The sixth group holding frame 8 which is rotated and pressed against the third group holding frame 109 by the spring force of the spring washer 120 moves in the direction orthogonal to the optical axis along the contact surface 109b of the third group holding frame 109.

By combining the rotation positions of the three eccentric rollers 146, the sixth group holding frame 118 can be moved in a desired direction within the plane orthogonal to the optical axis, and the sixth group with respect to the third group lens L3. The optical axis shift of the lens L3 can be corrected.

Here, the screw hole 11 of the sixth group holding frame 118
The diameter of 8b is equal to the required necessary optical axis deviation correction amount by 6
It is set to be larger than the outer diameter of the screw shaft portion of the screw 145 so that the group holding frame 118 can move.

The extension 109e of the third-group holding frame 109
Of a portion of the rear end where the cylindrical protrusion 109c is formed,
Projection amount t1 of rearward in the optical axis direction with respect to contact surface 109b
And the thickness t2 of the flange portion 118a of the sixth group holding frame 118.
And t1 <t2.

For this reason, the reinforcing plate 119 is attached to the sixth group holding frame 11.
8 does not come into contact with the rear end face of the flange portion 118a, but does not come into contact with the rear end face of the extension amount 109e of the extension 109e of the third group holding frame 109. Therefore, the spring washer 120
Accordingly, the sixth group holding frame 118 can be reliably pressed against the third group holding frame 109 via the reinforcing plate 119, and the distance between the third group lens L3 and the sixth group lens L6 in the optical axis direction can be determined.

Further, the cylindrical projections 109c provided on the three extended portions 109a of the third-group holding frame 109 are fitted into the round holes 119b and the elongated holes 119c of the reinforcing plate 119, whereby the reinforcing plate 119 is fitted. The position 119 is positioned with respect to the third group holding frame 109 within the optical axis correction plane (plane orthogonal to the optical axis) of both holding frames 109 and 118, and the deformation of the extension 109a of the third group holding frame 109 is also prevented. You.

For this reason, the reinforcing plate 119 can be integrated with the third-group holding frame 109 during the correction of the optical axis deviation, and can be integrally formed with the sixth-group holding frame 118 after the correction is completed to form a movable portion as a whole. Thus, it is possible to reliably prevent the deformation of both the holding frames 109 and 118 without any trouble caused by the force acting from the outside of the apparatus.

As described above, in the present embodiment, 6
In the middle of tightening the screw 145 for connecting the group holding frame 118 to the third group holding frame 109, the spring washer 120
6 group holding frame 118 and 3rd group holding frame 109 by the spring force of
6 to correct the optical axis deviation with the optical axis direction interval determined
The group holding frame 118 is configured to be movable in the direction orthogonal to the optical axis with respect to the third group holding frame 109.

The spring force of the spring washer 120 causes 6
With the group holding frame 118 pressed against the third group holding frame 109,
The rotation of the eccentric roller 146 can be converted into the movement of the sixth group holding frame 118 in the direction orthogonal to the optical axis.

For this reason, since there is no need for an external force by the adjusting jig which is finally removed unlike the related art, there is no problem caused by deformation of each component.
Optical axis deviation can be corrected with high accuracy.

Further, since the rotation of the eccentric roller 146 is converted without performing the adjustment movement of the sixth group holding frame 118 directly by an external force, the amount of rotation of the eccentric roller 146 is appropriately selected. Fine adjustment of the sixth group holding frame 109 with respect to the third group holding frame 118 can be easily performed, and the optical axis shift can be corrected with high accuracy.

The specific configuration of the present invention is not limited to the configuration described in the above embodiment.

For example, in the above embodiment, the final fixing of the sixth group holding frame 118 is performed by tightening the screw 145, but the eccentric roller 146 is adhered to the third group holding frame 109 to fix the eccentric roller. The rotation position of 146 may be fixed.

Also, if space permits,
The spring force of the spring washer 120 can be generated at a position different from that under the screw 145, and the spring washer 12
0 and the position of the reinforcing plate 119 may be exchanged.

Further, instead of the spring washer 120, it is also possible to use a component having spring properties such as a disc spring, a wave washer, a plate spring, and a coil spring.

In this embodiment, when the screw 145 is to be tightened, the screw shaft of the screw 145 and the screw lower hole 109d of the third group holding frame 109 or the head of the screw 145 and the sixth group holding frame 118 are tightened. Third group holding frame due to frictional force generated between flange portion 118a and frictional force generated at contact surface 109b when moving sixth group holding frame 118 relative to third group holding frame 109 in the direction orthogonal to the optical axis. The deformation and torsion of the extension portion 119a of 109 and the torsion of the flange portion 118a of the sixth group holding frame 118 are prevented as follows.

First, between the screw shaft portion of the screw 145 and the screw lower hole portion 109d of the third group holding frame 109 or the sixth group holding frame 11
Regarding the deformation and torsion of the extension 109a of the third-group holding frame 109 due to the frictional force generated on the contact surface between the eighth and third-group holding frame 109, the deformation of the extension 109a is prevented by the reinforcing plate 119. This is prevented.

Second, the head of the screw 145 and the sixth group holding frame 1
As for the twisting of the flange portion 118a due to the frictional force generated between the flange portion 118a and the flange portion 18a, the reinforcing plate 119, which is prevented from moving relative to the third-group holding frame 109, is interposed between the two. Generation of reinforcement plate 119
And screw 145 to prevent this.

The reinforcing plate 119 used in this embodiment is used.
Can be omitted if the strength of other components is sufficient, and may be used as needed.

Further, a separate deformation preventing member may be provided for each component deformation factor, and a component having a low coefficient of friction such as a Teflon (registered trademark) sheet may be sandwiched separately from the deformation preventing member. Thus, generation and transmission of frictional force may be prevented.

In the above embodiment, the eccentric rollers 146
Is fixed to the sixth group holding frame 118, and the elongated hole 109e engaging with the eccentric roller 146 is formed in the third group holding frame 109. However, the eccentric roller is fixed to the third group holding frame, The hole may be formed in the sixth group holding frame.

Further, in the above embodiment, the interchangeable lens used in the single-lens reflex camera has been described. However, the present invention is not limited to the lens barrel of various photographing apparatuses (optical devices) such as a lens shutter camera, a digital camera and a video camera. Can be used for parts.

[0083]

As described above, according to the present invention,
By pressing the second element holding member against the first element holding member by the urging force of the urging member in the incompletely coupled state by the coupling member, relative positioning of these members in the optical axis direction can be performed. In addition, the relative positioning of the first and second element holding members in the direction orthogonal to the optical axis can be performed by the adjustment mechanism configured between the first and second element holding members in the incompletely coupled state.

Therefore, the relative position adjustment of each element holding member (that is, the optical axis with high accuracy) can be performed without the trouble caused by the deformation of the parts as in the case of using the adjusting jig for applying the urging force from the outside of the apparatus as in the prior art. The first and second element holding members can be integrally assembled while maintaining the above-described relative position adjustment state by proceeding with the joining member as it is.

In the first element holding member, at a plurality of positions in the circumferential direction of the portion for holding the optical element, extending portions are formed extending in the direction of the optical axis, and the leading end thereof is connected to the second element holding member. In this case, if a deformation preventing member is provided between the coupling member and the second element holding member, the deformation preventing member is engaged with the tips of the plurality of extending portions to prevent deformation of the extending portions. In addition, it is possible to prevent deterioration of the optical axis deviation correction accuracy due to deformation of the first element holding member.

A friction reducing member is provided between the coupling member and the second element holding member to reduce the occurrence of friction between the coupling member and the second element holding member in the process of coupling the coupling member. With this arrangement, it is possible to prevent deterioration of the optical axis deviation correction accuracy due to deformation of the second element holding member.

If the deformation preventing member and the friction reducing member are prevented from moving in the plane orthogonal to the optical axis with respect to the first and second element holding members, they are integrated with both element holding members even after the assembly. Thus, a movable portion that can move in the optical axis direction can be configured.

Further, if the friction reducing member is also used as a deformation preventing member, or the urging member is disposed between the coupling member and the deformation preventing member or the friction preventing member, the deformation of the parts can be efficiently performed with a simple structure. Can be prevented.

[Brief description of the drawings]

FIG. 1 is a sectional view of an interchangeable lens for a single-lens reflex camera according to an embodiment of the present invention.

FIG. 2 is an exploded perspective view showing a lens holding structure provided in the interchangeable lens.

[Explanation of symbols]

 107 Guide cylinder 108 Cam cylinder 109 Third group holding frame 110 Fourth group holding frame 111 Shake correction unit 112 Straight-ahead cylinder 117 Electromagnetic aperture unit 118 Sixth group holding frame 119 Reinforcement plate 120 Spring washer 122 Filter frame 123 First group holding frame 125 Focus unit 138 Inner cam cylinder 140 2nd group holding frame 146 Eccentric roller

Claims (10)

[Claims] 1. An optical apparatus including first and second element holding members that are coupled to each other in an optical axis direction and hold optical elements, respectively, wherein an end surface orthogonal to an optical axis of the first element holding member and the second element holding member are connected to each other. A coupling member that couples the first and second element holding members in a state where the second element holding member is in contact with the optical axis orthogonal end face; and a coupling member between the coupling member and the second element holding member. An urging member disposed and capable of generating an urging force for pressing the second element holding member against the first element holding member in the optical axis direction at least in an incompletely connected state by the connecting member; The first and second element holding members are disposed between the first and second element holding members, and the first and second element holding members are relatively positioned along the optical axis orthogonal end surface in the incompletely coupled state. With an adjustment mechanism. Optical equipment. 2. The adjustment mechanism is mounted on one of the first and second element holding members so as to be rotatable around a rotation axis extending in a direction orthogonal to an optical axis, and is attached to the rotation axis. An eccentric member having a peripheral surface eccentric to the eccentric member, and two surfaces formed on the other element holding member and parallel to the optical axis direction sandwiching the peripheral surface of the eccentric member. The optical device according to claim 1, wherein: 3. The device according to claim 1, wherein the coupling member is a screw for coupling the first and second element holding members by tightening, and the urging member is sandwiched between the screw and the second element holding member. The optical device according to claim 1, wherein the optical device is a spring washer. 4. An extended portion extending in the optical axis direction at a plurality of circumferential positions of a portion for holding the optical element in the first element holding member, and an extension portion for coupling the second element holding member to a tip thereof is formed. A deformation preventing member is provided between the coupling member and the second element holding member, the deformation preventing member being engaged with tips of the plurality of extending portions to prevent deformation of the extending portions. The optical device according to any one of claims 1 to 4, wherein: 5. The deformation preventing member is disposed between the urging member and the second element holding member, and the urging member holds the second element via the deformation preventing member. The optical device according to claim 4, wherein a member is pressed against the first element holding member. 6. The apparatus according to claim 4, wherein the deformation preventing member is prevented from moving in a plane orthogonal to the optical axis with respect to the first element holding member in an incompletely connected state by the connecting member. Or the optical device according to 5. 7. A friction reduction between the coupling member and the second element holding member for reducing friction between the coupling member and the second element holding member in a coupling process by the coupling member. The optical device according to any one of claims 1 to 6, wherein a member is disposed. 8. The optical device according to claim 4, wherein the deformation preventing member is configured to friction between the coupling member and the second element holding member during the coupling process by the coupling member. An optical apparatus characterized in that it also serves as a friction reducing member for reducing friction. 9. The optical device according to claim 7, wherein the urging member presses the second element holding member against the first element holding member via the friction reducing member. machine. 10. The apparatus according to claim 7, wherein the friction reducing member is prevented from moving in a plane orthogonal to the optical axis with respect to the first element holding member in an incompletely connected state by the connecting member. 10. The optical device according to any one of items 1 to 9.