JP2006058582A - Optical equipment - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To miniaturize optical equipment by constituting an optical eccentricity adjusting mechanism to be compact. <P>SOLUTION: The optical equipment has a 1st member (109) and a 2nd member (118) holding an optical element respectively, a 3rd member (119) attached to the 1st member so that its movement on a plane nearly orthogonal to an optical axis is prevented and preventing the movement of the 2nd member in an optical axis direction, with respect to the 1st member, and adjusting mechanisms (118d and 146) constituted, by using the 3rd member and the 2nd member and adjusting the position of the 2nd member on the plane nearly orthogonal to the optical axis with respect to the 1st member. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to an optical apparatus having a member for holding an optical element, and more particularly to position adjustment of a member for holding an optical element in a plane substantially orthogonal to the optical axis.

An optical element holding structure in the optical apparatus as described above is disclosed in, for example, Patent Document 1. In this holding structure, when assembling a plurality of element holding members each holding an optical element (lens, etc.) in the optical axis direction, in order to correct the optical axis shift of each optical element due to a manufacturing error. The relative positioning in the optical axis direction is performed by pressing the second element holding member against the first element holding member by the biasing force of the biasing member in the incompletely coupled state by the coupling member, By performing relative positioning in the direction perpendicular to the optical axis of the first and second element holding members by the adjusting mechanism configured between the first and second element holding members in the incompletely coupled state, each element holding member Relative position adjustment (that is, accurate optical axis deviation correction) can be performed, and the first and second element holding members are integrally assembled while maintaining the relative position adjustment state. And it is configured so as to be able to Teru.
Japanese Patent Laid-Open No. 2002-196205 (FIG. 2)

However, in the optical apparatus proposed in the above publication, the coupling structure of the first and second element holding members by the coupling member and the first and second element holding members between the first and second element holding members. It is necessary to provide an adjustment mechanism that performs relative positioning in the optical axis orthogonal direction of
Since the shapes of the first and second element holding members are complicated and the occupied space becomes large, the degree of freedom in designing the device is greatly limited, and the device may be increased in size.

  Accordingly, an object of the present invention is to improve the degree of freedom in designing an optical device by increasing the arrangement efficiency of the adjustment mechanism and to reduce the size of the optical device.

  In order to solve the above-described problem, an optical apparatus according to one aspect of the present invention includes a first member and a second member that hold optical elements, respectively, and the first member substantially in a plane orthogonal to the optical axis. A third member that is attached to prevent movement of the second member and prevents movement of the second member relative to the first member in an optical axis direction; the third member; and the second member; And an adjustment mechanism that adjusts the position of the second member in a plane substantially orthogonal to the optical axis with respect to the first member.

  According to the present invention, the adjustment mechanism that adjusts the position of the second member relative to the first member in the plane substantially orthogonal to the optical axis is configured using the third member and the second member. Thus, unlike the conventional example, there is no need to provide an adjustment mechanism between the first member and the second member, and the optical apparatus can be miniaturized.

  Embodiments of the present invention will be described below with reference to the drawings.

(Example 1)
FIG. 1 is a cross-sectional view in the optical axis direction of an interchangeable lens (optical apparatus) for a single-lens reflex camera according to an embodiment of the present invention. 2 and 3 show a lens holding structure provided in the interchangeable lens in a perspective view and an exploded perspective view, respectively. FIG. 4 is a diagram illustrating the behavior of the sixth lens holding frame when the eccentric pin is rotated.

  This interchangeable lens has first to sixth lens units L1 to L6, all the lens units L1 to L6 move in the optical axis direction according to the zooming operation, and the second lens unit according to the focusing operation. L2 moves in the optical axis direction. At this time, the third lens unit L3 and the sixth lens unit L6 move integrally, the fifth lens unit L5 moves in the optical axis direction, and also in a direction substantially orthogonal to the optical axis in order to perform a shake correction operation. Moving.

  The first lens unit L1 is held by a first lens holding frame 123, the second lens unit L2 is held by a second lens holding frame 140, and the third lens unit L3 is a third lens holding frame. 109, the fourth lens unit L4 is held by the fourth lens holding frame 110, and the sixth lens unit L6 is held by the sixth lens holding frame 118.

  A mount 101 has a bayonet portion to be attached to the camera body, and is screwed to the fixed cylinder 102. Reference numeral 103 denotes an exterior ring, which is sandwiched and fixed between the mount 101 and the fixed cylinder 102.

  A scale window 104, a name plate 105, and a SW panel 106 are attached to the exterior ring 103. By switching a switch (not shown) provided on the SW panel 106, camera functions such as autofocus and shake correction can be selected and used.

  Reference numeral 107 denotes a guide cylinder fixed to the fixed cylinder 102, and the cam cylinder 108 is engaged with the outer periphery of the guide cylinder 107 so as to be rotatable around the optical axis.

    Here, rollers 113 to 116 are screwed to the third lens holding frame 109, the fourth lens holding frame 110, the shake correction unit 111, and the rectilinear cylinder 112, respectively, and these rollers 113 to 116 are guide cylinders. The guide groove portion 107 and the cam groove portion of the cam cylinder 108 are engaged.

  In the above-described configuration, when the cam barrel 108 is rotated around the optical axis, the third lens unit L3, the fourth lens unit L4, and the shake correction unit are engaged by the engagement of the rollers 113 to 116 with the guide groove and the cam groove. 111 and the straight cylinder 112 move in the optical axis direction.

  The third lens holding frame 109 (first member) is screwed with an electromagnetic diaphragm unit 117 composed of a diaphragm driving section and a diaphragm blade section. Further, the third lens holding frame 109 has flange-shaped portions protruding in the circumferential direction at three locations protruding in the direction orthogonal to the optical axis, and these flange-shaped portions have extended portions 109a extending rearward in the optical axis direction. Is provided.

  A contact surface 109b, a screw hole portion 109d, and a pair of columnar protrusions 109c extending in the direction orthogonal to the optical axis are provided at the ends of these extending portions 109a. A sixth lens holding frame is provided on the contact surface 109b. 118 (second member) contacts.

  In front of the outer peripheral surface of the sixth lens holding frame 118 in the optical axis direction, flange portions 118a are provided at three locations in the circumferential direction so as to correspond to the contact surface 109b of the third lens holding frame 109. A sixth screw hole 118b corresponding to the screw hole 109d formed in the extending part 109a is formed in the flange part 118a. Further, on the rear side in the optical axis direction of the flange portion 118a, a groove portion 118d (adjustment mechanism) extending in the optical axis direction and a pair of wall portions 118e facing in the optical axis direction are provided at three locations in the circumferential direction.

  The reinforcing plate 119 (third member) is formed in a ring shape, and the reinforcing plate 119 has a reinforcing plate screw hole portion 119a corresponding to the sixth screw hole portion 118b of the sixth lens holding frame 118 in the circumferential direction. It is formed in three places. Further, the reinforcing plate 119 is formed with a pair of wall portions 119d extending in the optical axis direction at three locations in the circumferential direction, and the first shaft portion 146a of the eccentric pin 146 is held by these wall portions 119d. Yes.

  Further, the reinforcing plate 119 is formed with a round hole 119b and an elongated hole 119c, and the cylindrical protrusion 109c of the third lens holding frame 109 is engaged with these holes 119b and 119c. . By engaging the cylindrical protrusion 109c with the holes 119b and 119c, the reinforcing plate 119 is positioned in the plane orthogonal to the optical axis with respect to the third lens holding frame 109, and the third lens holding frame 109 is extended. Deformation of the protruding portion 109a can be prevented.

  The reinforcing plate 119 is provided with a pair of wall portions 119d extending in the optical axis direction at three locations in the circumferential direction by outsert molding.

  A hook portion is provided at the front end of the fourth lens holding frame 110 in the optical axis direction, and this hook portion holds the movable diaphragm 121 so as to be movable in the plane orthogonal to the optical axis.

  The shake correction unit 111 holds the fifth lens unit L5 so as to be movable in a direction substantially orthogonal to the optical axis, and drives the fifth lens unit L5 by a driving unit including a magnet and a coil.

  A filter frame 122 is screwed to the straight cylinder 112. A bayonet portion is provided on the outer periphery of the front end of the filter frame 122, and a screw portion is provided on the inner periphery. Accessories such as a hood and a filter can be attached to the filter frame 122, respectively.

  In addition, the first lens holding frame 123 is screwed to the filter frame 122. The contact portions of the filter frame 122 and the first lens holding frame 123 are each formed in a slope shape extending in the circumferential direction. By attaching the first lens holding frame 123 to the filter frame 122 while rotating, the first lens holding The attachment position of the frame 123 with respect to the filter frame 122 in the optical axis direction can be changed. Thereby, it is possible to correct the shift of the focal position between the wide-angle side and the telephoto side due to a manufacturing error.

  A decorative ring 124 has a lens name and the like displayed on the front surface. A focus unit 125 is screwed to the guide tube 107. The focus unit 125 mainly includes a vibration type motor and a differential mechanism, and outputs the rotation amount of the focus key 127 according to the rotor rotation amount of the vibration type motor and the rotation amount of the manual ring 126. A stepping motor may be used instead of the vibration type motor.

  On the front side in the optical axis direction of the focus unit 125, a gyro substrate 129 to which a pair of vibration gyros 128 for detecting angular velocities in horizontal and vertical directions are soldered is screwed via a rubber damper (not shown). Yes.

  In addition, an encoder flexible substrate 130 on which a gray code pattern is formed is affixed to the outer periphery of the protruding portion that extends in an arc shape from the focus unit 125. Further, on the front side of the focus unit 125 in the optical axis direction, a protrusion is provided at a phase where the vibration gyro 128 and the encoder flexible board 130 are not provided, and a roller 131 is screwed to the protrusion. .

  Reference numeral 132 denotes a zoom operation ring. The roller 131 engages with a groove provided in the circumferential direction, so that it can rotate around the optical axis while being prevented from moving in the optical axis direction. On the inner periphery of the zoom operation ring 132, a recess is formed in which a zoom key 133 screwed to the cam cylinder 108 is engaged. When the zoom key 133 is engaged with the recess, the cam cylinder 108 can be rotated integrally with the zoom operation ring 132 via the zoom key 133.

  Reference numeral 134 denotes an intermediate cylinder, and on the outer periphery thereof, a protrusion that engages with a linear groove extending in the optical axis direction provided on the inner periphery of the zoom operation ring 132 is provided on the outer periphery of the filter frame 122 on the inner periphery. A lead groove portion with which the protruding portion engages is formed. For this reason, the intermediate cylinder 134 rotates integrally with the zoom operation ring 132, and moves forward and backward 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.

  Reference numeral 135 denotes a zoom rubber wound around the outer periphery of the zoom operation ring 132. Reference numeral 136 denotes a name ring elastically coupled to the front end portion of the zoom operation ring 132 in the optical axis direction. A zoom brush 137 is screwed to the zoom operation ring 132 and is used to detect the positional relationship between the zoom operation ring 132 and the encoder flexible board 130 by sliding on the gray code pattern of the encoder flexible board 130.

  Reference numeral 138 denotes an inner cam cylinder, and a roller 139 is screwed through a coil spring. The roller 139 engages with a cam groove provided in the guide tube 107 and a rectilinear groove provided in the cam tube 108 extending in the optical axis direction. For this reason, the inner cam cylinder 138 advances and retreats in the optical axis direction while rotating around the optical axis together with the cam cylinder 108.

  Reference numeral 140 denotes a second lens holding frame that holds the second lens unit L <b> 2, and a protrusion provided on the outer periphery engages with a cam groove provided on the inner periphery of the inner cam cylinder 138. The key portion extending from the second lens holding frame 140 is engaged with the focus key 127 so as to rotate integrally.

  For this reason, the second lens holding frame 140 accompanies rotation of the inner cam cylinder 138 in the optical axis direction and the cam groove portion of the inner cam cylinder 138 in accordance with the rotation operation of the cam cylinder 108 (the focus key 127 is stopped). It advances / retreats in the optical axis direction by the total amount of change in the optical axis direction of the engagement point. Further, the second lens holding frame 140 advances and retreats according to the amount of change in the optical axis direction of the engagement point with the cam groove portion of the inner cam cylinder 138 while rotating as the focus key 127 rotates (the cam cylinder 108 stops). To do. In the interchangeable lens of the present embodiment, by these mechanisms, the focal position shift caused by the focal length change in the inner focus is mechanically corrected, and the second lens unit L2 is advanced and retracted in the optical axis direction.

  Reference numeral 141 denotes a scale sheet that rotates integrally with the focus key 127 that is the output of the focus unit 125, and displays the focal 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 the flexible flexible board or performs various controls. .

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

  Reference numeral 146 denotes an eccentric pin (adjustment mechanism) having first and second shaft portions 146a and 146b each having an eccentric central axis, and a cross hole shape for abutting and rotating a plus driver The portion is provided at the center of the end surface on the side far from the optical axis of the second shaft portion 146b.

  Here, the first shaft portion 146 a of the eccentric pin 146 is press-fitted into the groove portion 118 d of the sixth lens holding frame 118, so that the first shaft portion 146 a can rotate without being detached from the sixth lens holding frame 118. It can move without play in the optical axis direction. That is, as shown in FIG. 4, the first shaft portion 146a is held by the end surface in the optical axis orthogonal direction (end surface extending in the optical axis direction) of the groove portion 118d.

  Further, the second shaft portion 146b is press-fitted and held by the wall portion 118e of the sixth lens holding frame 118, so that the second shaft portion 146b is held so as to be rotatable with respect to the sixth lens holding frame 118 and movable in the circumferential direction. Yes. The second shaft portion 146b is press-fitted and sandwiched by the wall portion 119d of the reinforcing plate 119.

  In the configuration of the interchangeable lens described above, when the zoom operation ring 132 is rotated, the cam cylinder 108 is rotated via the zoom key 133, and all the lens units L1 to L6 are advanced and retracted in the optical axis direction to perform a zooming operation. At this time, the third lens unit L3 and the sixth lens unit L6 advance and retract integrally.

  A rotational force can be applied to the focus key 127 by driving the vibration type motor during autofocusing and manually rotating the manual ring 126 during manual focusing. As a result, the second lens unit L2 can move forward and backward to perform focusing. Further, during the shake correction operation, the shake correction unit 111 is controlled in accordance with the output of the vibration gyro 128 and the output of the encoder flexible board 130, and the fifth lens unit L5 is caused by the generated shake in a plane substantially orthogonal to the optical axis. Drive in a direction to cancel the movement of the image on the image plane (film imaging plane).

  Next, the optical axis deviation correction in the lens holding structure that integrally connects the third lens unit L3 and the sixth lens unit L6 will be described in detail. The optical axis misalignment correction is performed by adjusting the fixed cylinder 102 before mounting the mount 101, the exterior ring 103, the manual ring 126, the main board 142, the back cover 144, and the parts fixed thereto, among the components described above. In a state of being fixed to a jig body (not shown), the sixth lens holding frame 118 holding the sixth lens unit L6 is substantially orthogonal to the third lens holding frame 109 holding the third lens unit L3. Adjust the orientation and install.

  As a result, it is possible to correct the deterioration of the optical performance caused by the manufacturing error of the lens units L1 to L6 and the components that hold them, and obtain desired optical characteristics.

Next, a method for assembling a lens holding structure constituted by these components will be described.
First, the front end surface in the optical axis direction (end surface orthogonal to the optical axis) of the flange portion 118a of the sixth lens holding frame 118 is abutted against the contact surface 109b of the third lens holding frame 109. Next, in a state where the reinforcing plate 119 is in contact with the rear end surface in the optical axis direction of the flange portion 118a of the sixth lens holding frame 118, the self-tapping screw 145 (fastening member) to which the spring member 120 is attached is used. The three flange portions 118a of the six lens holding frame 118 are screwed to the three extending portions 109a of the third lens holding frame 109, respectively.

  As a result, the third lens holding frame 109, the sixth lens holding frame 118, and the reinforcing plate 119 are integrated to form one movable unit in the interchangeable lens. In the optical axis deviation correction, the screw 145 is tightened (or loosened) halfway (incompletely tightened), that is, the sixth lens holding frame 118 is not completely fixed to the third lens holding frame 109. The sixth lens holding frame 118 is pressed against the third lens holding frame 109 via the reinforcing plate 119 by the spring force (biasing force) by the spring member 120 (biasing member) (with the third lens holding frame 109 and The reinforcing plate 119 cannot move relative to both the optical axis direction and the optical axis orthogonal direction, and the sixth lens holding frame 118 cannot move in the optical axis direction with respect to these two parts, but it moves in a direction substantially orthogonal to the optical axis. Held in a possible state).

  Here, as described above, of the eccentric pin 146, the first shaft portion 146a is sandwiched between the end surfaces orthogonal to the optical axis of the groove portion 118d formed in the sixth lens holding frame 118, and the second shaft portion. 146b is sandwiched by the wall 118e of the sixth lens holding frame 118 and the wall 119d of the reinforcing plate 119 from the optical axis direction and the circumferential direction of the reinforcing plate 119, respectively. In the above-described configuration, when the plus driver is brought into contact with the cross-shaped portion formed in the second shaft portion 146b of the eccentric pin 146 and rotated, the first shaft portion 146a rotates the second shaft portion 146b. Eccentric rotation as the center.

  That is, as shown in FIG. 4, when the first shaft portion 146a is rotated in the counterclockwise direction, the second shaft portion 146b follows the locus of the broken line B and the arrow about the first shaft portion 146a as the rotation center. The sixth lens holding frame 118 that rotates eccentrically in the A direction and contacts the first shaft portion 146a at the end surface orthogonal to the optical axis of the groove 118d moves in a direction substantially orthogonal to the optical axis.

  Then, by rotating the three eccentric pins 146 as described above, the sixth lens holding frame 118 can be moved to a desired position in the plane orthogonal to the optical axis. Thereby, the optical axis shift of the sixth lens unit L3 with respect to the third lens unit L3 can be corrected. Here, the inner diameter of the screw hole 118b of the sixth lens holding frame 118 is outside the screw shaft portion of the screw 145 so that the sixth lens holding frame 118 can be moved by an assumed necessary optical axis deviation correction amount. Needless to say, it is set larger than the diameter.

  As described above, in the above-described embodiment, in the process of assembling the sixth lens holding frame 118 to the third lens holding frame 109, the distance between the sixth lens holding frame 118 and the third lens holding frame 109 in the optical axis direction is set. In a determined state (the state in which the sixth lens holding frame 118 is pressed against the third lens holding frame 109 by the spring force of the spring member 120), an adjustment mechanism provided between the reinforcing plate 119 and the sixth lens holding frame 118 is used. The sixth lens holding frame 118 is configured to move in the direction substantially orthogonal to the optical axis with respect to the third lens holding frame 109 so that the optical axis deviation can be corrected.

  Therefore, the connecting portion of the third lens holding frame 109 and the sixth lens holding frame 118 configured with the shake correction unit 111 and the like interposed therebetween can be efficiently performed in a small occupied space without degrading the accuracy of optical axis deviation correction. The interchangeable lens can be reduced in size.

  In this embodiment, since the rotation of the eccentric pin 146 can be converted into the movement of the sixth lens holding frame 118 in the direction substantially perpendicular to the optical axis, the adjustment of the sixth lens holding frame 118 is performed. Compared with a configuration in which the movement is directly performed by an external force, the sixth lens holding frame 118 can be finely adjusted with respect to the third lens holding frame 118 by adjusting the amount of rotation of the eccentric pin 146, and the optical axis The deviation can be corrected with high accuracy.

  Further, in this embodiment, when the screw 145 is tightened, the frictional force generated between the shaft portion of the screw 145 and the screw hole portion 109d of the third lens holding frame 109, the head of the screw 145 and the sixth lens holding frame. The frictional force generated between the flange 118a of the 118 and the frictional force generated on the contact surface 109b when the sixth lens holding frame 118 is moved in the direction substantially perpendicular to the optical axis with respect to the third lens holding frame 109. The deformation / twisting of the extending portion 119a of the three-lens holding frame 109 and the twisting of the flange portion 118a of the sixth lens holding frame 118 are prevented as follows.

  First, the frictional force generated between the screw shaft portion of the screw 145 and the screw hole portion 109d of the third lens holding frame 109, the contact surface between the sixth lens holding frame 118 and the third lens holding frame 109. The deformation / twist of the extension portion 109a of the third lens holding frame 109 due to the generated frictional force is prevented by preventing the extension portion 109a from being deformed by the reinforcing plate 119.

  Secondly, regarding the twist of the flange portion 118a due to the frictional force generated between the head portion of the screw 145 and the flange portion 118a of the sixth lens holding frame 118, the relative movement between the third lens holding frame 109 and the third lens holding frame 109 is relative. By sandwiching the blocked reinforcing plate 119 therebetween, the generation of the frictional force is limited and prevented between the reinforcing plate 119 and the screw 145.

  Further, in the present embodiment, the position of the cross hole shape for engaging the plus driver for rotating the eccentric pin 146 (the hexagonal hole shape for engaging the hexagon wrench, etc.) is the optical axis direction and the circumference of the sixth lens holding frame 118. By adopting a configuration that does not move in the direction, the point of action of the force does not fluctuate during the adjustment work, so that the workability is good and the optical axis deviation can be corrected with high accuracy.

  In addition, the specific structure of this invention is not limited to the said Example. For example, in the above embodiment, the final fixing of the sixth lens holding frame 118 is performed by tightening the screw 145, but the eccentric pin 146 is bonded to the sixth lens holding frame 118 or the reinforcing plate 119 after adjustment. Thus, a configuration in which the rotational position of the eccentric pin 146 is fixed, or a configuration in which the sixth lens holding frame 118 is bonded to the reinforcing plate 119 may be employed.

  If space is allowed, the spring force by the spring member 120 can be generated at a position different from the screw 145, and the positions of the spring member 120 and the reinforcing plate 119 are interchanged. May be. Further, as the spring member 120, it is also possible to use a component having spring properties such as a disc spring, a wave washer, a leaf spring, and a coil spring.

  In the above embodiment, the interchangeable lens used in the single-lens reflex film camera has been described. However, the present invention is used in a lens barrel portion of various photographing apparatuses (optical devices) such as a lens shutter camera, a digital camera, and a video camera. be able to.

  The description of the above embodiment also embodies the following invention 1 to invention 7.

(Invention 1)
In an optical apparatus including first and second element holding members that are coupled to each other in the optical axis direction and hold optical elements, respectively, the first element holding member and the second element holding member in the optical axis direction A restriction mechanism that restricts the relative position; a movement restriction member that restricts relative movement of the first element holding member at least in the direction perpendicular to the optical axis; and between the movement restriction member and the second element holding member. An optical apparatus that is disposed and has an adjustment mechanism for relatively adjusting the position of the movement limiting member and the second element holding member in the direction perpendicular to the optical axis.

(Invention 2)
In an optical apparatus including first and second element holding members that are coupled to each other in the optical axis direction and hold the optical elements, the optical axis orthogonal end face of the first element holding member and the second element holding member A coupling member that couples the first and second element holding members in a state in which the optical axis orthogonal end surface is in contact with each other, and is disposed between the coupling member and the second element holding member. An urging member capable of generating an urging force for pressing the second element holding member against the first element holding member in the optical axis direction in an incompletely coupled state by the coupling member, and the urging member A movement limiting member disposed between the first element holding member and the second element holding member, the relative movement of the first element holding member at least in the direction perpendicular to the optical axis being restricted, and the movement limiting member and the second element Between the element holding members An optical apparatus characterized by having an adjusting mechanism for relatively positioning the second element holding member and the movement limiting member along the optical axis perpendicular to the end face at the incompletely bonded state.

(Invention 3)
The adjustment mechanism is disposed so as to be rotatable about a rotation axis in a direction orthogonal to the optical axis with respect to one member of the movement limiting member and the second element holding member, and is eccentric with respect to the rotation axis. An eccentric member having an outer peripheral surface, and two surfaces formed on the other member and parallel to the optical axis direction sandwiching the peripheral surface of the eccentric member. The optical apparatus according to 1 or 2.

(Invention 4)
The adjustment mechanism is arranged so as to be rotatable about a rotation axis in a direction orthogonal to the optical axis with respect to the movement limiting member, and a rotational force transmitting portion formed coaxially with the rotation axis, and with respect to the rotation axis An eccentric member having an eccentric peripheral surface, and two surfaces formed on the second element holding member and parallel to the optical axis direction sandwiching the peripheral surface of the eccentric member are configured. The optical apparatus according to claim 1 or 2, wherein

(Invention 5)
The eccentric member is sandwiched between two surfaces sandwiching the rotation shaft formed on the movement limiting member and two surfaces sandwiching the rotation shaft formed on the second element holding member, and the movement 5. The optical apparatus according to claim 3, wherein the optical apparatus is arranged to be rotatable about the rotation axis with respect to the limiting member or the second element holding member.

(Invention 6)
The coupling member is a screw for coupling the first and second element holding members by tightening, and the biasing member is a substantially annular spring sandwiched between the screw and the second element holding member The optical apparatus according to any one of inventions 2 to 5, wherein the optical apparatus is a member.

(Invention 7)
An extension portion that extends in the optical axis direction and joins the second element holding member at the tip thereof is formed at a plurality of positions in the circumferential direction of the portion that holds the optical element in the first element holding member, 7. The optical apparatus according to claim 1, wherein the movement restricting member is formed with an engaging portion that engages with tips of the plurality of extending portions.

  As described above, according to the present embodiment, the first and second element holding members can be made simple and have a small occupied space as compared with the conventional configuration, and the degree of freedom in designing the device is increased. This greatly improves the size of the device.

It is sectional drawing of the interchangeable lens for single-lens reflex cameras which is embodiment of this invention. It is a perspective view which shows the lens holding structure with which the said interchangeable lens was equipped. It is a disassembled perspective view which shows the lens holding structure with which the said interchangeable lens was equipped. It is a figure which shows the behavior of the 6th lens holding frame when rotating an eccentric pin.

Explanation of symbols

107 Guide cylinder 108 Cam cylinder 109 Third lens holding frame 110 Fourth lens holding frame 111 Shake correction unit 112 Straight advance cylinder 117 Electromagnetic diaphragm unit 118 Sixth lens holding frame 119 Reinforcement plate 120 Spring member 122 Filter frame 123 First lens holding frame 125 Focus unit 138 Inner cam cylinder 140 Second lens holding frame 145 Screw 146 Eccentric pin

Claims (9)

A first member and a second member each holding an optical element;
A third member which is attached to the first member so as to be prevented from moving in a plane substantially orthogonal to the optical axis, and which prevents the second member from moving in the optical axis direction with respect to the first member; ,
An adjustment mechanism configured to adjust the position of the second member in a plane substantially orthogonal to the optical axis with respect to the first member, the third member being configured using the third member and the second member; Optical equipment. The third member is attached to the first member by a fastening member;
The optical apparatus according to claim 1, wherein the position adjustment is performed in an incompletely tightened state of the fastening member.   The optical apparatus according to claim 2, further comprising an urging member that presses the second member against the first member in the optical axis direction in the incompletely tightened state.   The optical apparatus according to claim 3, wherein the biasing member biases the second member toward the first member through the third member.   The optical apparatus according to claim 4, wherein the biasing member is disposed between a head of the fastening member and the third member.   The adjusting mechanism includes a first peripheral surface that contacts the third member, and a second peripheral surface that contacts the second member and is eccentric with respect to the first peripheral surface. The optical apparatus according to claim 1, further comprising a core member, wherein the position adjustment is performed by rotating the eccentric member. The first member includes a holding portion that holds the optical element, and an extending portion that extends in the optical axis direction from a plurality of locations in the circumferential direction of the holding portion,
The second member is brought into contact with the tip of each extension portion in the optical axis direction, and the third member is engaged so as to be prevented from moving in a plane substantially perpendicular to the optical axis. The optical apparatus according to claim 1, wherein the optical apparatus is an optical apparatus.   The optical apparatus according to claim 7, wherein the third member is formed in a ring shape that connects the plurality of extending portions. The optical apparatus according to claim 7, wherein the adjustment mechanism is provided for each extension portion.

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