JP4514211B2 - Optical equipment - Google Patents

Description

  The present invention relates to an optical apparatus such as a digital still camera, a video camera, or an interchangeable lens. More specifically, the present invention relates to a disengagement of a cam engagement portion that drives the lens barrel when an external force is applied to the lens barrel of the optical apparatus. It relates to a structure that prevents

  As one of the basic configurations of a lens barrel that expands and contracts in the optical axis direction, a cam follower portion provided in a lens holding tube that holds a lens engages with a cam groove portion provided in the cam tube, and the cam tube is connected to the optical axis. There is one in which the lens holding cylinder is driven in the optical axis direction by rotating around. The lens holding cylinder is guided in the optical axis direction by a rectilinear cylinder having a rectilinear key groove that engages with the cam follower.

  In such a lens barrel, when an external force is applied to the front end of the lens barrel, such as when an optical device is dropped, the cam follower portion may come off from the cam groove, and the lens barrel may not be driven. is there.

  For this reason, in the optical apparatus proposed in Patent Document 1, a claw-like portion that protrudes in the lens barrel circumferential direction is formed in a portion that engages with the straight key groove portion of the cam follower portion provided in the lens holding tube, A rail portion is formed in the rectilinear key groove portion of the rectilinear cylinder to engage the claw-shaped portion. Accordingly, when an external force is applied to the lens holding cylinder, the cam follower portion is prevented from coming off from the cam groove portion by the engagement between the claw-like portion and the rail portion.

Further, in the optical device proposed in Patent Document 2, when an external force is applied to the lens holding cylinder, the contact portion provided at the end in the optical axis direction of the lens holding cylinder abuts the cam surface of the cam groove. This prevents the cam follower part from coming off from the cam groove part.
JP 2002-277711 A (paragraphs 0042-0045, FIG. 3 etc.) Japanese Patent Laid-Open No. 10-311491 (paragraphs 0028 to 0029, FIG. 2, etc.)

  However, when the claw-like portion is provided in the cam follower portion as in the optical device proposed in Patent Document 1, the size of the portion that engages with the cam groove portion in the cam follower portion, that is, the amount of engagement with the cam surface is reduced. For this reason, unless the strength (hardness) of the cam cylinder having the cam follower portion or the cam groove portion is considerably increased, the cam follower portion or the cam surface may be deformed due to concentration of external force at the contact portion between the cam follower portion and the cam surface. is there.

  Here, in general, an engineering plastic such as PC (polycarbonate) is used as a material for the lens barrel. This is because the weight / strength ratio is good and a complicated shape can be easily formed. However, when a fiber such as carbon or glass is added as a general technique to increase the hardness of engineering plastic, there is a problem that the molding reliability of the cam follower part or cam groove part (cam cylinder) is lowered.

  Further, if the size of the cam follower portion and the cam groove portion in the lens barrel radial direction is increased in order to increase the amount of engagement of the cam follower portion, the outer diameter of the lens barrel increases, which hinders downsizing of the optical device.

  The present invention provides an optical apparatus having a lens barrel structure that has high strength against external force without increasing the hardness of the material and without increasing the cam barrel follower portion and the cam barrel radial dimension. One of the purposes is to provide it.

An optical apparatus of the present invention as one aspect includes a first member having a cam portion, a second member having a cam follower portion engaged with the cam portion, and an optical axis orthogonal direction with respect to the first member. And the third member disposed adjacent to each other, and the cam portion relatively drives the first and second members in the optical axis direction by the relative rotation of the first and second members around the optical axis. To do. Further, a protrusion that protrudes toward the second member and can contact the cam follower is provided on one side of the first member in the optical axis direction from the cam portion, and is separated from each other in the optical axis direction of the third member. each position, the first stepped portion capable of contacting and second stage portions in the optical axis direction perpendicular to the first member projects into the first member side is formed, butt raising portion, the It is provided in the position between the 1st step part and the 2nd step part in 1 member.

  According to the present invention, since the cam follower part abuts the cam part and the projection part, it is possible to receive an external force acting from the other in the optical axis direction, so that the hardness of the material can be increased or the light of the cam follower part and the cam part can be increased. Even if the dimension in the direction perpendicular to the axis (in the barrel radial direction) is not increased, an optical device having a barrel structure having high strength against external force can be realized.

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

  6 and 7 show the configuration of a digital still camera (imaging device, optical apparatus) that is Embodiment 1 of the present invention. FIG. 6 shows the camera in use (lens barrel extended state), and FIG. 7 shows the camera not in use (lens barrel retracted state).

  In these drawings, reference numeral 101 denotes a camera body. The camera body 101 is covered with an operation member (not shown) and an exterior member 103 having a liquid crystal display device 102. The camera body 101 includes a finder block 104, a hard substrate 105 having a circuit including an electrical element, and a recording device that records a photographed image on a recording medium such as a battery, a semiconductor memory, and an optical disk (not shown), a flash Have a unit. Reference numeral 106 denotes a telescopic lens barrel. Reference numeral 107 denotes an image sensor composed of a CCD sensor, a CMOS sensor, and the like. Reference numeral 108 denotes a low-pass filter, which is fixed to the base 109.

  A third lens driving mechanism 112 including a step motor and a screw feeding mechanism is attached to the base 109, and a third lens holder 111 that holds the third lens unit 110 by the operation of the third lens driving mechanism 112 is provided. Driven in the optical axis direction.

  Hereinafter, the lens barrel 106 will be described with reference to FIGS. Reference numeral 11 shown in FIGS. 6 and 7 denotes a fixed cylinder, and a cam groove portion 11a and a straight key groove portion 11b are formed on the inner periphery thereof. The fixed cylinder 11 is fixed to the base 109.

  A cam cylinder (first member) 14 also shown in FIGS. 1 and 2 is arranged on the inner peripheral side of the fixed cylinder 11. Cam followers 14e that engage with the three cam groove portions 11a of the fixed barrel 11 and gear portions (not shown) that extend in a predetermined angular range in the circumferential direction are provided at three locations on the outer peripheral surface of the cam barrel 14 in the circumferential direction. ing. A first cam groove portion 14 a and a second cam groove portion 14 f are formed on the inner peripheral surface of the cam cylinder 14.

  Although not shown, a drive gear extending in the optical axis direction is engaged with the gear portion through an opening formed in the peripheral wall portion of the fixed cylinder 11, and this drive gear is driven by a cam cylinder drive actuator such as a step motor (not shown). By being driven to rotate, the cam cylinder 14 is driven in the optical axis direction by the engaging action of the cam groove portion 11a of the fixed cylinder 11 and the cam follower 14e while rotating around the optical axis.

  Reference numeral 15 denotes a rectilinear cylinder (third member) disposed adjacent to the inner periphery (inside in the radial direction) of the cam cylinder 14. A flange portion 15f is formed on the outer periphery of the image side (hereinafter, also referred to as the rear side) of the rectilinear cylinder 15, and further, the rectilinear key groove portion 11b of the fixed cylinder 11 is formed on the outer periphery of the flange portion 15f. A straight key portion 15e to be engaged is formed. The flange portion 15b of the rectilinear cylinder 15 sandwiches the cam cylinder 14 in the optical axis direction together with a bayonet claw 17 disposed at the end of the rectilinear cylinder 15 on the object side (hereinafter also referred to as the front side). Thereby, the rectilinear cylinder 117 moves in the optical axis direction together with the cam cylinder 14. However, since the rectilinear key portion 15e is engaged with the rectilinear key groove portion 11b of the fixed cylinder 11, even if the cam cylinder 14 rotates, the rectilinear cylinder 15 does not rotate.

  As shown in FIGS. 1 and 2, the rectilinear cylinder 15 is provided with a first rectilinear key groove portion 15 a and a second rectilinear key groove portion 15 g extending in the optical axis direction at three locations in the circumferential direction.

  A lens barrier 119 is closed to protect the first lens unit 16 when the lens barrel is retracted, and a barrier driving mechanism 120 drives the lens barrier 119 to open and close. The lens barrier 119 and the barrier driving mechanism 120 are fixed to the front end portion of the first lens holding cylinder (second member) 13 that holds the first lens unit 16.

  Cam followers 13 a that engage with first cam groove portions 14 a provided in the cam cylinder 14 are provided at three positions in the circumferential direction on the outer peripheral surface of the first lens holding cylinder 13. Further, a rectilinear key portion 13b that engages with the first rectilinear key groove portion 15a of the rectilinear cylinder 15 is formed at the base portion of the cam follower 13a. The first lens holding cylinder 13 is allowed to move only in the optical axis direction by the engagement of the first rectilinear key groove 15a of the rectilinear cylinder 15 and the rectilinear key section 13b. When the cam cylinder 14 rotates, the first lens holding cylinder 13 is driven in the optical axis direction by the engaging action of the first cam groove portion 14a and the cam follower 13a.

  6 and 7, reference numeral 122 denotes a second lens unit, which is held by a second lens holder 125. In addition, the diaphragm / shutter blade 123 and the shutter drive unit 124 are attached to the second lens holder 125.

  The outer periphery of the second lens holder 125 is provided with a cam follower 127 that engages with a second cam groove 14 f formed in the cam cylinder 14, and the cam follower 127 is urged radially outward by a spring 126. Thus, the cam cylinder 14 is engaged with the second cam groove portion 14f in a pressed state. Further, a rectilinear key portion 125 b that engages with the second rectilinear key groove portion 15 g of the rectilinear cylinder 15 is formed on the outer peripheral portion of the second lens holder 125.

  The second lens holder 125 is allowed to move only in the optical axis direction by the engagement of the second rectilinear key groove 15g of the rectilinear cylinder 15 and the rectilinear key portion 125b. When the cam cylinder 14 rotates, the second lens holder 125 is driven in the optical axis direction by the engagement action between the second cam groove 14f and the cam follower 127.

  The above-described cam cylinder driving actuator, the third lens driving mechanism 112, and the shutter driving device 124 are electrically connected to the circuit of the hard board 105 through the flexible printed board 128.

  In the digital camera configured in this manner, when an operation member (not shown) such as a main switch is operated in the non-use state shown in FIG. 7, the cam cylinder drive actuator is controlled by the circuit on the hard board 105, and the cam cylinder 14 Rotates. As a result, the cam cylinder 14 and the rectilinear cylinder 15 move forward in the optical axis direction, and the first lens holding cylinder 13 and the second lens holder 125 move forward in the optical axis direction by the rotation of the cam cylinder 14. Further, the third lens driving mechanism 112 is also controlled, whereby the third lens holder 111 moves to the front side. In this way, the photographing optical system in the lens barrel 106 is arranged in the use state (wide state) shown in FIG.

  When a release button (not shown) is operated in this use state, the image sensor 107 is exposed and the acquired image is recorded after the autofocus and exposure determination operations.

  When assembling the lens barrel 106, as shown in FIG. 2, the three protrusions 15 c provided on the object side (front side) end portion of the outer peripheral surface of the rectilinear barrel 15 are replaced with the three projections 15 c of the cam barrel 14. The phase is adjusted to the introduction portion 14c provided at the end of the first cam groove portion 14a on the image plane side (rear side), and the rectilinear cylinder 15 is pushed into the cam cylinder 14. If the straight cylinder 15 is pushed forward in this state, the projection 15c moves forward along the first cam groove portion 14a, and when it advances to the front end, the projection 15c is removed from the extraction portion 14d provided at the front end of the first cam groove portion 14a. Thus, the rectilinear cylinder 15 is incorporated inside the cam cylinder 14.

  The first lens holding cylinder 13 is incorporated into the rectilinear cylinder 15 by aligning the phase of the cam follower 13a with the introduction portion 14c of the first cam groove 14a, and the rectilinear key section 13b with the first rectilinear key of the rectilinear cylinder 15. This is done by pushing the first lens holding tube 13 into the straight tube 15 after adjusting the phase to the introduction portion 15h of the groove portion 15a (opening formed in the flange portion 15f).

  Here, in the present embodiment, the wall thickness of the cam cylinder 14 excluding the cam groove portions 14a and 14f is not uniform. That is, as shown in FIG. 3A, the first lens holding cylinder 13 and the rectilinear cylinder 15 are arranged on the image surface side (right side in the drawing) of the inner peripheral surface 14m of the cam cylinder 14 from the first cam groove portion 14a. A protruding portion 14b protruding inward in the lens barrel radial direction is formed, and the thickness of this portion of the cam barrel 14 is thicker than other portions. 3B and 3C schematically show a part of the conventional cam cylinder 14, rectilinear cylinder 15 and first lens holding cylinder 13, and the rectilinear cylinder is similar to FIG. 3A showing the present embodiment. The dimension from the inner peripheral surface of 15 to the outer peripheral surface of the cam cylinder 14 is D.

  Here, FIG. 3C shows a case where the inner peripheral surface 14m of the cam cylinder 14 and the outer peripheral surface 15m of the rectilinear cylinder 15 are almost entirely diameter-fitted. 3B shows that the thickness of the rectilinear cylinder 15 is made thinner than that of FIG. 3A and the position of the contact surface (sliding surface) with the cam cylinder 14 is determined. The object side end and the image side end (however, the object side of the flange portion) protrude toward the cam cylinder 14, and the outer peripheral surface abuts (slids) against the inner peripheral surface 14 m of the cam cylinder 14. The case where possible first and second step portions 15b-1 and 15b-2 are formed is shown. With this configuration, sliding resistance with the cam cylinder 14 can be reduced as compared with the case of FIG. 3C.

  Further, in this embodiment, in addition to the shape of FIG. 3B, a protrusion 14b is provided on the image surface side of the first peripheral surface 14m of the cam cylinder 14 from the first cam groove 14a. The protrusion 14b is provided using a space S formed between the outer peripheral surface 15m of the rectilinear cylinder 15 and the inner peripheral surface 14m of the cam cylinder 14 in the configuration of FIG. 3B. The protruding portion 14b protrudes between the first step portion 15b-1 and the second step portion 15b-2 of the rectilinear cylinder 15 in the optical axis direction. Further, the inner peripheral surface of the protruding portion 14 b can come into contact with the outer peripheral surface 15 m of the rectilinear cylinder 15.

  Further, the object-side surface of the protrusion 14b has a tapered surface shape that is continuous with the tapered cam surface 14g on the image surface side of the first cam groove 14a. Thereby, the cam surface 14g on the image surface side of the first cam groove portion 14a is substantially extended to the first lens holding tube 13 side, and the amount of engagement of the cam follower 13a with respect to the cam surface 14g is increased. Therefore, when an external force is applied from the object side to the first lens holding cylinder 13 from the object side, the cam follower 13a is received by the extended cam surface 14g, so that the external force absorption area is larger than that shown in FIGS. 3B and 3C. This increases the deformation of the cam follower 13a and the cam surface 14g.

  Further, in this embodiment, the protrusion 14b and the first and second portions 14b and the first and the second portions are not changed without changing the dimension D from the inner peripheral surface of the straight cylinder 15 to the outer peripheral surface of the cam cylinder 14 (that is, the diameter of the outer peripheral surface of the cam cylinder 14). Second step portions 15b-1 and 15b-2 are formed. As a result, the external force absorption area can be increased without increasing the diameter of the lens barrel. Further, by forming thick portions in the straight cylinder 15 and the cam cylinder 14 in the order of the first step portion 15b-1, the projecting portion 14b, and the second step portion 15b-2 in the optical axis direction, the straight cylinder 15 Since the thickness balance between the cam cylinder 14 and the cam cylinder 14 can be satisfactorily achieved, a structure strong against deformation due to external force can be obtained.

  Further, in this embodiment, as shown in FIG. 4 in which the cam cylinder 14 is developed around the optical axis, the protrusion 14b is provided along the entire zoom region from WIDE to TELE in the first cam groove 14a. It has been. Thereby, the external force absorption area can always be increased in the use state of the camera. The portion of the first cam groove portion 14a extending from the WIDE toward the image plane side is a drive area (collapse area) between the WIDE and the retracted position, but with respect to the entire zoom area from the WIDE to the TELE. By providing only the protrusion 14b, the sliding resistance with the rectilinear cylinder 15 during rotation relative to the rectilinear cylinder 15 can be reduced as compared with the case where the protrusion is also provided in the retracted region.

  Here, in the case of the present embodiment, the protruding amount of the protruding portion 14b from the inner peripheral surface of the cam cylinder 14 and the protruding amount of the step portions 15b-1 and 15b-2 from the outer peripheral surface of the rectilinear cylinder 15 are 0.05 to It is set to about 0.10 mm. As described above, the rectilinear cylinder 15 is incorporated inside the cam cylinder 14 using the first cam groove portion 14a. During this incorporation, as shown by a rectangular frame in FIG. The step portion 15 b-1 comes into contact (interference) with the protruding portion 14 b of the cam cylinder 14. FIG. 4 shows how the first step portion 15b-1 moves with respect to the cam cylinder 14 when the rectilinear cylinder 15 is assembled. At this time, the first step portion 15b-1 moves so as to cross the protruding portion 14b twice. Therefore, if the first step portion 15b-1 is formed over the entire circumference of the rectilinear cylinder 15, it may be difficult to incorporate.

  For this reason, in this embodiment, the first step portion 15b-1 is protruded by dividing the first step portion 15b-1 into three portions in the circumferential direction of the rectilinear cylinder 15 and providing it with a small width that does not extend in a belt shape. The range which interferes with the part 14b is reduced, and it can be easily assembled by utilizing a slight deformation of the thin part of the straight cylinder 15 where the first step part 15b-1 is not provided. In order to facilitate the incorporation, the image surface side surface 14n of the protrusion 14b or the object side surface 15n of the first step portion 15b-1 may be a tapered surface.

  In addition, the first step portion 15b-1 may be formed in a strip shape extending in the circumferential direction at three locations (three regions) in the circumferential direction as long as it can be incorporated, or over the entire circumference of the rectilinear cylinder 15 It may be formed. Furthermore, it is arbitrary how many first step portions 15b-1 are divided.

  FIG. 5 shows the cam cylinder 14 of the digital still camera that is Embodiment 2 of the present invention developed around the optical axis. The configuration of the digital still camera to which this embodiment is applied is the same as that described in Embodiment 1 with reference to FIGS.

In this embodiment, as compared with Example 1, further increasing the engagement of the cam surface 14g of the cam follower 13a and the first cam groove 14a, to increase more force absorption area, butt raised portion 14b of the cam barrel 14 Is larger than that of Example 1 and is 0.10 mm or more.

Also in this embodiment, as described with reference to FIG. 4 of the first embodiment, when the rectilinear cylinder 15 is incorporated into the cam cylinder 14, the first step portion 15b-1 of the rectilinear cylinder 15 has the locus shown in FIG. in it to move relative to the cam barrel 14, when if collision raised portion 14b in the entire zoom area from WIDE to TELE as in example 1 in the cam barrel 14 is formed, the by its projecting amount is greater The movement of the first step portion 15b-1 is completely prevented, and the incorporation becomes impossible. For this reason, in the present embodiment, as in the first embodiment, the first step portion 15b-1 is divided into three portions in the circumferential direction of the rectilinear cylinder 15 and is provided with a small width that does not extend in a belt shape. The protrusions 14b are provided only in the vicinity of WIDE and TELE, which are generally used frequently.

Thus the stepped portion 15b-1 of the protrusion 14b and the first provided because it does not at all interfere in incorporating a rectilinear barrel 15 to the cam barrel 14, a large amount of protrusion of the butt raised portion 14b of the cam barrel 14 However, the incorporation is not hindered.

  FIG. 5 illustrates the case where the protrusions 14b are provided only in the vicinity of WIDE and in the vicinity of TELE. However, as shown in FIG. 5, the intermediate region from WIDE to TELE is originally the first step portion 15b- Since 1 does not pass, the protrusion 14b may be provided in this portion. That is, the position where the protrusion 14b is provided is arbitrary as long as the first step 15b-1 does not pass when the straight cylinder 15 is incorporated into the cam cylinder 14.

  Moreover, you may form the 1st step part 15b-1 in the shape extended in the circumferential direction at three places (3 area | regions) of the circumferential direction. Furthermore, it is arbitrary how many first step portions 15b-1 are divided.

  As described above, according to each of the above embodiments, the cam follower 13a can receive the external force applied from the object side by contacting the cam surface 14g and the protrusion 14b of the first cam groove 14a. Even if the hardness of the material of the cam follower 13a or the cam barrel 14 is not increased, or the dimension of the cam follower 13a and the cam groove portion 14a in the direction perpendicular to the optical axis (in the lens barrel radial direction) is not increased, it has high strength against external force. A camera having a lens barrel structure can be realized.

  In each of the above embodiments, the case where the cross-sectional shape of the protrusion 14b provided on the cam cylinder 14 is set as shown in FIG. 3A has been described, but the cross-sectional shape of the protrusion in the present invention is not limited to this, Any shape that can abut against the cam follower 13a engaged with the first cam groove 14a when at least an external force is applied may be used.

  In each of the above embodiments, the case where the cam follower 13a is engaged with the cam groove portion 14a has been described. However, in the present invention, as shown in FIG. 8, the cam follower 13a ′ provided in the first lens holding cylinder 13 is camped. The present invention can also be applied to a case where it engages with a ridge cam 14a ′ provided on the cylinder 14 ′. Also in this case, a protrusion 14 b ′ on which the cam follower 13 a ′ can come into contact with the cam follower 13 a ′ when an external force is applied is provided closer to the image surface than the protrusion cam 14 a ′ on the inner peripheral surface of the cam cylinder 14.

  Further, in each of the above embodiments, the case where the cam follower is provided in the first lens holding cylinder as the second member has been described. However, in the present invention, the cam portion is provided in the first lens holding cylinder as the first member. The present invention can also be applied when provided. In this case, the cam follower is provided in the second member corresponding to the cam cylinder in each of the above embodiments. Then, by providing a protrusion on the object side of the cam portion of the first lens holding cylinder, when an external force acts on the first lens holding cylinder from the object side, the surface of the protrusion on the image surface side is the cam follower. To increase the external force absorption area.

  In each of the above embodiments, the case where the present invention is applied to a lens barrel of a digital still camera has been described. However, the present invention can also be applied to a lens barrel of a video camera and an interchangeable lens of a single-lens reflex camera. it can.

1 is a perspective view illustrating a configuration of a lens barrel of a digital still camera that is Embodiment 1 of the present invention. FIG. FIG. 3 is an exploded perspective view illustrating a configuration of a lens barrel according to the first embodiment. FIG. 3 is a cross-sectional view illustrating a schematic configuration of a lens barrel of Embodiment 1; FIG. 3 is a development view of a cam barrel that constitutes the lens barrel of the first embodiment. FIG. 6 is a development view of a cam barrel constituting a lens barrel of a digital still camera that is Embodiment 2 of the present invention. FIG. 3 is a cross-sectional view illustrating a configuration of the digital still camera (when used) according to the first exemplary embodiment. FIG. 3 is a cross-sectional view illustrating a configuration of a digital still camera (when not used) according to the first exemplary embodiment. Sectional drawing which shows the typical structure of the modification of the Example of this invention.

Explanation of symbols

13 first lens holding cylinder 13a cam follower 13b rectilinear key section 14 cam cylinder 14a cam groove section 14b protrusion 14g cam surface 15 rectilinear cylinder 15b-1, 15b-2 step section 101 camera body 106 lens barrel

Claims (9)

A first member having a cam portion; a second member having a cam follower portion engaged with the cam portion; and a third member disposed adjacent to the first member in a direction orthogonal to the optical axis. And the cam part relatively drives the first and second members in the optical axis direction by the relative rotation of the first and second members around the optical axis,
A protrusion that protrudes toward the second member and protrudes toward the second member is provided on one side of the first member from the cam in the optical axis direction.
A first step portion and a second step projecting toward the first member at positions spaced apart from each other in the optical axis direction in the third member and capable of contacting the first member in the direction orthogonal to the optical axis Is formed,
Optical instruments the collision raised portion, characterized in that is provided at a position between said first stepped portion of the first member and the second step portion. The second member is driven in the optical axis direction on the object side with respect to the first member;
The optical apparatus according to claim 1, wherein the protrusion is provided on the image plane side with respect to the cam portion of the first member.   The optical apparatus according to claim 1, wherein the protrusion has a shape along the cam portion in a circumferential direction of the first member.   The optical apparatus according to claim 1, wherein the protrusion has a shape that is continuous with a cam surface of the cam portion.   The other member driven to the object side with respect to one member of the first and second members holds a lens closest to the object in the optical system of the optical apparatus. The optical apparatus according to any one of 1 to 4.   The optical apparatus according to claim 1, wherein the protrusion is capable of contacting the third member in a direction orthogonal to the optical axis.   The said 1st step part is an object side rather than the said 2nd step part, Comprising: The any one of the Claims 1-6 characterized by the above-mentioned. The optical apparatus as described in any one.   The optical apparatus according to claim 7, wherein the protrusion is formed in a region that does not contact the first step when the first member and the third member are assembled. .   The optical apparatus according to claim 1, further comprising a photoelectric conversion element that photoelectrically converts an object image formed by an optical system including the lens.