JP2010044203A - Mount structure of optical equipment and optical equipment - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a mount structure of optical equipment that can protect an electric contact, and to provide optical equipment. <P>SOLUTION: The mount structure (20) of the optical equipment includes: an aperture regulation member (21) formed to project to an inside diameter side of a mount aperture (11) formed in a housing (10), having an aperture part (21a) through which the subject light is made to pass, and having a surface part turning to a subject side which is provided nearly orthogonal to an advancing direction of the subject light; the electric contact (27) provided projectingly to the subject side from the surface part of the aperture regulation member; and a projection part (28) provided projectingly to the subject side from an area between the electric contact and the aperture part on the surface part of the aperture regulation member. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a mount structure for an optical device and an optical device.

A mount mechanism for connecting a camera and a lens barrel is known in which an electrical contact is provided for enabling electrical communication between them (see, for example, Patent Document 1).
JP 2004-361898 A

In the conventional mounting mechanism, the electrical contact is provided so as to protrude from the support member that supports the contact, and there is a possibility of contact with other members and damage.
An object of the present invention is to provide an optical device mounting structure and an optical device that can protect electrical contacts.

The present invention solves the above problems by the following means. In addition, in order to make an understanding easy, although the code | symbol corresponding to embodiment of this invention is attached | subjected and demonstrated, it is not limited to this.
According to the first aspect of the present invention, there is provided an opening portion (21a) that protrudes toward the inner diameter side of the mount opening (11) formed in the housing (10), and has an opening portion (21a) that allows subject light to pass therethrough, and a surface portion facing the subject side. Is provided with an opening defining member (21) provided substantially orthogonal to the traveling direction of the subject light, a communication unit provided protruding from the surface portion of the opening defining member toward the subject, and the opening defining member It is a mount structure (20) of an optical device comprising a protrusion (28) provided so as to protrude from the region between the communication part and the opening in the surface part to the subject side.

According to a second aspect of the present invention, in the optical instrument mounting structure according to the first aspect, the communication unit includes an electrical contact, and the electrical contact (27) is substantially parallel to an edge of the opening (21a). A mounting structure for an optical apparatus, wherein a plurality of the protrusions (28) are provided adjacent to each other, and the protrusion (28) is one protrusion formed so as to extend substantially parallel to the plurality of electrical contacts. (20).
According to a third aspect of the present invention, there is provided the optical device mounting structure according to the first or second aspect, wherein the mounting structure is formed in an annular shape along the peripheral edge of the mounting opening (11) formed in the housing (10). An annular member (22) disposed closer to the subject side than the surface portion of the opening defining member (21), and provided at an inner peripheral edge portion of the annular member and a distal end portion of the protruding portion (28). The projecting height of the projection and the electrical contact (27) is set so that the tip of the electrical contact does not contact the substantial rigid body when the substantial rigid body is passed. It is the mounting structure (20) of an apparatus.
According to a fourth aspect of the present invention, in the mount structure for an optical device according to the third aspect, among the fastening objects (2) to be fastened to the optical device (1), the inner side of the annular member (22) is fastened. When the portion (52) having the largest radial dimension in the portion to be inserted is passed to the inner peripheral edge of the annular member and the tip of the protrusion (28), the tip of the electrical contact (27) Is a mount structure (20) for an optical device, wherein the projecting height of the projecting portion and the electrical contact is set so as not to contact the fastening object.
According to a fifth aspect of the present invention, in the optical device mount structure according to any one of the first to fourth aspects, the opening (21a) formed in the opening defining member (21) is circular. There is a mount structure (20) for an optical instrument.
According to a sixth aspect of the present invention, in the mount structure for an optical device according to any one of the first to fifth aspects, light is applied to the surface portion (28a) of the protruding portion (28) facing the communication portion. It is the mount structure (20) of the optical equipment characterized by the reflection suppression process which suppresses reflection.
According to the seventh aspect of the present invention, there is provided an opening portion (21a) that protrudes toward the inner diameter side of the mount opening (11) formed in the housing (10), and has an opening portion (21a) that allows subject light to pass therethrough, and is a surface portion facing the subject side. Is provided with an opening defining member (21) provided substantially orthogonal to the traveling direction of the subject light, a communication unit provided protruding from the surface portion of the opening defining member toward the subject, and the opening defining member A mounting structure that can be attached to and detached from the mounting structure (20) of the optical device, and a protruding portion that protrudes toward the subject from a region between the communication unit and the opening in the surface portion. An optical device, a communication-receiving part (55) capable of communicating by being arranged opposite to the communication part, and a housing for storing the protruding part when the mounted structure is mounted on the mount structure Department ( 6) is an optical device characterized by having a.
Note that the configuration described with reference numerals may be improved as appropriate, or at least a part thereof may be replaced with another component.

  According to the present invention, it is possible to provide an optical device mounting structure and an optical device that can protect electrical contacts.

Hereinafter, a camera including an embodiment of a mount structure of an optical apparatus to which the present invention is applied will be described with reference to the drawings.
FIG. 1 is a perspective view showing a system including the camera of the embodiment.
FIG. 2 is a perspective view showing a lens barrel included in the camera system shown in FIG.
FIG. 3 is a diagram showing an operation when the camera body and the lens barrel included in the camera system shown in FIG. 1 are mounted.

The camera body 1 forms a camera system together with a lens barrel 2 that is detachably attached to the camera body 1.
The camera body 1 includes a housing 10, a mount unit 20, and the like.
The housing 10 is a portion that forms the external appearance surface of the camera body 1, and is formed in a substantially rectangular parallelepiped box shape by a metal material or a synthetic resin material, for example.

  A circular opening (hereinafter referred to as a housing opening 11) is formed in the front surface of the housing 10 in a front view (see FIG. 3). Subject light traveling from the lens barrel 2 toward the camera body 1 passes through the housing opening 11 and is guided to an image sensor (not shown). In addition, the front part of the camera body 1 means a surface part that faces the subject at the time of photographing among the surface parts of the camera body 1.

The mount portion 20 forms one of the mount mechanisms that connect the camera body 1 and the lens barrel 2.
The mount portion 20 is a bayonet mount having a mount base portion 21, a front decoration ring 22, a claw portion 23, a reference surface defining portion 24, an engagement groove 25, a latch pin 26, an electrical contact 27, a protruding portion 28, and the like.
The mount base 21 is a plate-like member formed of, for example, a black-colored synthetic resin material, and is fixed to the inner surface of the housing 10. The mount base 21 is provided so as to protrude from the peripheral edge of the housing opening 11 formed in the front portion of the housing 10 to the inner diameter side thereof, and is mounted at the center of the mount opening through which subject light passes. A portion 21a is formed. The mount opening 21a is formed in a circular shape, and can function as a fixed diaphragm.

  The front decoration ring 22 is an annular member that extends along the peripheral edge of the housing opening 11 and is formed of, for example, a metal material. The front decoration ring 22 is fixed to the mount base 21 with screws V1. The front decoration ring 22 has a function of improving the appearance quality of the camera body 1 by making the peripheral edge of the housing opening 11 invisible from the outside.

When the lens barrel 2 is mounted on the camera body 1, the claw portion 23 is mechanically engaged with a claw portion 52 provided on the mount portion 50 of the lens barrel 2 described later, whereby the camera body 1. And the relative movement of the lens barrel 2 in the optical axis direction are limited.
The claw portions 23 are formed so as to protrude from the inner peripheral surface of the front decoration ring 22 toward the inner diameter side of the front decoration ring 22, and for example, three are provided at substantially equal intervals around the optical axis.

The reference surface defining portion 24 is, for example, a plate-like member formed in an annular shape with a metal material, and is fixed to the mount base 21 with screws V2. The reference surface defining portion 24 is disposed on the inner diameter side of the front decoration ring 22 in a front view. The surface portion facing the subject side in the optical axis direction in the reference surface defining portion 24 functions as a reference surface portion that defines the flange back length.
The engagement groove 25 is a groove formed in the mount base 21, extends along the inner peripheral edge of the reference surface defining portion 24, and its center substantially coincides with the optical axis A.

The latch pin 26 is formed so as to protrude from the reference plane defining portion 24 toward the subject side in the optical axis direction. The latch pin 26 is fitted into a latch hole 54 (see FIG. 2) provided in the mount portion 50 of the lens barrel 2 in a state where the lens barrel 2 is mounted on the camera body 1, so that the lens barrel 2 and the camera body 1 are limited in relative rotation around the optical axis.
The latch pin 26 is movable between a projecting position (see FIG. 1) projecting from the mount base 21 and an accommodation position accommodated in the mount base 21 and is biased to the projecting position by a spring (not shown). Yes. A latch pin operation button 26a is provided on the front surface of the housing 10, and the latch pin 26 can be moved to the accommodation position by pushing the latch pin operation button 26a.

  The electrical contact 27 electrically connects the camera body 1 and the lens barrel 2 and is provided in the mount portion 50 of the lens barrel 2 in a state where the lens barrel 2 is attached to the camera body 1. It contacts the electrical contact 55 (see FIG. 2). A plurality (for example, nine in this embodiment) of the electrical contacts 27 are arranged adjacent to each other in parallel to the peripheral edge of the mount opening 21a. The camera body 1 supplies power to the lens barrel 2 using a part of these contacts, and performs electrical communication with the lens barrel 2 using the other part of the contacts.

  The electrical contact 27 is formed in a pin shape, and is provided so as to protrude from the region on the inner diameter side of the engagement groove 25 in the surface portion of the mount base 21 facing the subject in the optical axis direction toward the subject in the optical axis direction. The electrical contact 27 is a movable contact that can move between a protruding position that protrudes from the mount base 21 and an accommodation position that is accommodated in the mount base 21, and is biased to the protruding position by a spring (not shown).

  The projecting portion 28 protects the electrical contact 27, and is provided between the plurality of electrical contacts 27 and the mount opening 21 a on the surface of the mount base 21 facing the subject in the optical axis direction (the lens barrel 2 side). It is provided so as to protrude from the region to the subject side in the optical axis direction. The protrusion 28 is formed integrally with the mount base 21 and the color thereof is black.

  Here, the plurality of (9) electrical contacts 27 are arranged in parallel to the opening edge of the mount opening 21 a of the mount base 21, and a gap is formed between the individual electrical contacts. On the other hand, the protruding portion 28 is one protrusion extending in parallel with the opening edge of the electrical contact 27 and the mount opening 21a, and the surface portion facing the plurality of electrical contacts 27 is a continuous surface. It has become. Moreover, the surface part 28a (refer FIG. 3A) which opposes the electrical contact 27 of the protrusion part 28 is an uneven surface in which fine unevenness | corrugation was formed, and it can suppress reflection of light. ing.

Next, the configuration of the lens barrel 2 will be described.
The lens barrel 2 is an example of a camera accessory that is detachably attached to the camera body 1, and includes a barrel main body 30, a photographing lens 40, a mount 50, and the like.
The lens barrel main body 30 is, for example, a housing of the lens barrel 2 formed in a cylindrical shape from a synthetic resin material.
The taking lens 40 is an optical system that guides subject light to an image sensor provided in the camera body 1, and is housed inside the barrel main body 30. The photographing lens 40 is formed by a plurality of lens groups and includes a zoom lens and a focus lens.

  The mount 50 forms the other of the mount mechanisms that fasten the camera body 1 and the lens barrel 2, and is provided at the end of the lens barrel main body 30 on the camera body side in the optical axis direction. A lens barrel 2 shown in each drawing including FIG. 1 is an example of a lens barrel that can be attached to the camera body 1, and the camera body 1 has a mount portion having substantially the same configuration as the lens barrel 2. A plurality of types of lens barrels equipped with can be selectively mounted.

The mount 50 of the lens barrel 2 has a shape corresponding to the mount 20 of the camera body 1, and includes a mount base 51, a claw 52, an engagement protrusion 53, a latch hole 54, an electrical contact 55, and a recess 56. Etc. (see FIG. 2 for the engagement protrusion 53, the latch hole 54, the electrical contact 55, and the recess 56).
The mount base 51 is a disc-shaped portion that closes the opening on the optical axis direction camera body side of the barrel main body 30, and an opening for allowing subject light to pass through is formed in the center. Yes.

  The claw portion 52 is formed so as to protrude from the outer peripheral surface of the mount base portion 51 to the radially outer side of the lens barrel 2. For example, three claw portions 52 are provided at substantially equal intervals around the optical axis. The claw portion 52 is provided so as to extend in the circumferential direction with the optical axis A as the center, and the tip surface thereof forms a part of the cylindrical surface (arc surface). The mount base 51 and the claw 52 described above are substantially rigid bodies that are integrally formed of, for example, a synthetic resin material.

The engagement protrusion 53 is an annular portion formed to protrude from the surface portion of the mount base 51 facing the camera body side to the camera body 1 side, and its center substantially coincides with the optical axis A. Yes. The engagement protrusion 53 fits into the engagement groove 25 provided in the mount portion 20 of the camera body 1 in a state where the lens barrel 2 is mounted on the camera body 1.
Only a minute gap is formed between the engagement protrusion 53 and the engagement groove 25 so as to allow such sliding in the above-mentioned fitted state, and around the optical axis between the lens barrel 2 and the camera body 1. The relative rotation in the radial direction between the lens barrel 2 and the camera body 1 is limited. Thus, the engagement protrusion 53 and the engagement groove 25 function as a positioning mechanism that cooperates to define the mounting position of the lens barrel 2 in the radial direction with respect to the camera body 1.

  Here, of the surface portion of the mount base 51 facing the camera body 1 side, the region on the outer diameter side of the engagement protrusion 53 is the mount of the camera body 1 with the lens barrel 2 mounted on the camera body 1. The reference surface defining portion 24 provided in the portion 20 is in contact with the reference surface defining portion 24 and functions as a reference surface portion in the lens barrel 2.

The latch hole 54 is a portion into which the latch pin 26 provided in the mount portion 20 of the camera body 1 is inserted, and is formed in a surface portion of the mount base portion 51 facing the camera body side in the optical axis direction.
The electrical contact 55 is a fixed contact that is fixed to the mount base 51, and a position that contacts the electrical contact 27 provided in the mount portion 20 of the camera body 1 in a state where the lens barrel 2 is mounted on the camera body 1. Is provided. The electrical contacts 55 are arranged on the inner diameter side of the engagement protrusion 53, and a plurality (for example, nine in this embodiment) are arranged in the circumferential direction around the optical axis A.

The concave portion (groove) 56 is a portion that accommodates the protruding portion 28 provided on the mount portion 20 of the camera body 1 described above in a state where the camera body 1 and the lens barrel 2 are connected. The recess 56 is formed on the surface of the mount base 51 facing the camera body, and extends in the circumferential direction with the optical axis A as the center.
When the lens barrel 2 is attached to the camera body 1, the camera system of the present embodiment relatively rotates the camera body 1 and the lens barrel 2 around the optical axis in a state where the reference surface portions are in contact with each other. Accordingly, the circumferential length of the recess 56 is set to be longer than the circumferential length of the projection 28, and the inside of the recess 56 moves while the projection 28 is housed in the recess 56 during the relative rotation described above. It is supposed to be.

Next, a procedure for attaching the lens barrel 2 to the camera body 1 will be described.
The user of the camera system first moves the camera body 1 and the lens barrel 2 closer to each other in the optical axis direction. Then, the mount base 51 of the lens barrel 2 is inserted into the inner diameter side of the front decoration ring 22 of the camera body 1 so that the reference surfaces of each other come into contact with each other. At this time, each claw portion 52 of the lens barrel 2 passes between each claw portion 23 of the camera body 1. Further, the latch pin 26 and the electrical contact 27 of the camera body 1 are pressed by the mount base 51 of the lens barrel 2 and moved to the accommodation positions.
Next, the lens barrel 2 and the camera body 1 are relatively rotated around the optical axis so that the positions of the claws 23 and 52 around the optical axis overlap. As a result, the latch pin 26 is fitted into the latch hole 54 and the fastening of the camera body 1 and the lens barrel 2 is completed. Further, due to this relative rotation, the electrical contacts 27 and 55 are brought into contact with each other while sliding.
When the lens barrel is completely attached to the camera body, the electrical contacts 27 and 55 are arranged to face each other, and energization and signal communication between them are possible.

Next, the protruding heights of the electrical contacts 27 and the protruding portions 28 provided on the camera body 1 will be described with reference to FIGS.
FIGS. 3A, 3B, and 3C show operations when the lens barrel 2 is moved in parallel with the optical axis A when the lens barrel 2 is attached to the camera body 1. FIG. 3A shows a state immediately before the lens barrel 2 is attached to the camera body, FIG. 3B shows a state where the lens barrel 2 is attached, and FIG. 3C shows FIG. The enlarged view of the part P in is shown. In the mounted state of FIG. 3B, the body-side claw 23 and the lens-side claw 52 are engaged with each other so that the lens cannot be removed from the body. 4A shows the operation when the lens barrel 2 is moved obliquely with respect to the camera body 1 of the embodiment, and FIG. 4B shows the operation of the camera body 101 of the comparative example. The operation when the lens barrel 2 is moved obliquely is shown.
The camera body 101 of the comparative form shown in FIG. 4B is substantially the same as the camera body 1 of the embodiment except that the mount base 121 is not equivalent to the protruding part 28. Therefore, the description is omitted.

Here, as described above, in the camera system of the present embodiment, it is necessary to insert the mount base 51 of the lens barrel 2 on the inner diameter side of the front ornament ring 22 of the camera body 1, but the user makes an error in operation. Therefore, there is a possibility that the lens barrel 2 is inclined as shown in FIG.
In such a case, assuming that no protrusion is formed on the mount base 121 as in the camera body 101 of the comparative embodiment, for example, the mount 50 of the lens barrel 2 has the largest radial dimension. The tip of the claw portion 52 contacts the electrical contact 27 (see FIG. 4B / FIG. 4B shows the state where the electrical contact 27 is pushed in from the claw portion 52), and the surface of the electrical contact 27 May damage it. Further, the claw portion 52 is inserted between the adjacent electrical contacts 27, and there is a possibility that the electrical contact 27 is damaged by applying a load in a direction (lateral direction) intersecting the protruding direction with respect to the electrical contact 27.

In contrast, the mount portion 20 of the camera body 1 of the present embodiment is provided with a protruding portion 28 adjacent to the electrical contact 27. And the protrusion height of the electrical contact 27 and the protrusion part 28 is the case where the nail | claw part 52 of the lens-barrel 2 is passed between the inner peripheral part of the front ornament ring 22, and the front-end | tip part of the protrusion part 28 (FIG. 4 ( In (a), the electrical contact 27 and the claw portion 52 are set so as not to contact each other.
Therefore, even if the lens barrel 2 is inserted obliquely with respect to the optical axis A and inserted into the inner diameter side of the front ornament ring 22 as shown in FIG. Since it contacts at least one of the portions 28 and does not contact the electrical contact 27, the electrical contact 27 can be protected.
As shown in FIG. 3C, the projecting portion 28 is provided with surfaces 28a, 28b, and 28c in a cross-sectional shape, while the concave portion 56 on the lens side is provided when the lens is mounted on the camera body. Surfaces 56a, 56b, and 56c are provided to face the surfaces 28a, 28b, and 28c, respectively.
Note that the protruding portion 28 of the present embodiment shown in FIG. 3 has a higher protruding height from the mount base 21 than the electrical contact 27, but the inner peripheral edge of the front decoration ring 22 and the tip of the protruding portion 28. If the electric contact 27 does not come into contact with the claw 52 when the claw 52 of the lens barrel 2 is passed to the lens barrel 2, the protruding height is not limited to this. For example, the electric contact 27 protrudes. The protruding height may be higher than that of the portion 28, and these protruding heights may be the same.

The camera body 1 of the present embodiment can obtain the following effects in addition to the effects described above.
(1) Since the surface of the electrical contact 27 formed of a metal material is a glossy surface, incident light is irregularly reflected, and this irregularly reflected light may travel into the optical path of subject light. In the camera body 1 of the embodiment, the protrusion 28 is provided between the electrical contact 27 and the mount opening 21a (the optical path of the subject light). Since the lens-side concave portion 56 and the body-side protruding portion 28 are inserted when the lens is mounted, it is possible to prevent the irregularly reflected light from the electrical contact 27 from traveling into the optical path.
(2) Since the protruding portion 28 is a single protrusion and the surface portion facing the plurality of electrical contacts 27 is a continuous surface, irregularly reflected light from the electrical contacts 27 can be reliably shielded.
(3) Since the protrusion 28 is made of a black material, it can absorb light and can reliably block irregularly reflected light from the electrical contact 27.
(4) Since fine irregularities are provided on the surface portion of the protruding portion 28 that faces the electric contact 27, it is possible to suppress irregular reflection light from the electric contact 27 from being further diffusely reflected by the protruding portion 28.

[Deformation]
The present invention is not limited to the embodiment described above, and various modifications and changes as shown below are possible, and these are also included in the technical scope of the present invention.
(1) In the embodiment, the height of the electrical contact and the protruding portion is such that the tip of the claw portion (cylindrical surface) provided on the mount portion of the lens barrel comes into contact with the front ring and the protruding portion. However, the present invention is not limited to this, and it is also possible to prevent the electrical contact from contacting the member when a flat member is passed over the front decoration ring and the protruding portion.
(2) In the embodiment, the protrusion for protecting the electrical contact is provided on the camera side mount, but not limited to this, provided on the camera accessory side that can be attached to the camera body such as an interchangeable lens barrel. Also good.
(3) In the embodiment, the protruding portion is a resin molded product provided integrally with the opening defining portion, but is not limited thereto, and may be a separate member from the opening defining portion. Moreover, the material which forms a protrusion part is not restricted to a synthetic resin material, For example, other materials, such as a metal, may be sufficient.
(4) In the embodiment, the opening formed in the opening defining portion is circular. However, the shape is not limited to this, and may be other shapes such as a rectangular shape.
(5) The structure of the contacts 27 and 55 as the signal communication unit is not limited to electrical contacts, and an optical communication type communication structure (for example, an infrared type communication structure) may be adopted. In this case, instead of the contacts 27 and 55, a transmission unit and a reception unit are provided. In this case, the projecting portion 28 not only serves as a protective member for the transmitting unit or the receiving unit, but also serves to prevent a part of subject light from becoming stray light and adversely affecting optical communication. Can also fulfill.

It is a perspective view which shows the camera system of embodiment. FIG. 2 is a perspective view of a lens barrel included in the camera system shown in FIG. 1. It is a figure which shows the operation | movement at the time of mounting | wearing with the camera body and lens barrel contained in the camera system shown in FIG. It is a figure which shows the operation | movement at the time of mounting | wearing with a camera body and a lens-barrel.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 Camera body: 2 Lens barrel: 20 Mount part: 21 Mount base part: 21a Mount opening: 22 Front decoration ring: 27 Electrical contact: 28 Projection part

Claims (7)

An opening formed on the inner diameter side of a mount opening formed in the housing, having an opening for allowing subject light to pass therethrough, and having a surface portion facing the subject side substantially orthogonal to the traveling direction of the subject light A regulating member;
A communication unit provided to project from the surface portion of the aperture defining member toward the subject;
A mounting structure for an optical apparatus, comprising: a protruding portion provided to protrude toward the subject side from a region between the communication portion and the opening portion in the surface portion of the opening defining member. In the mount structure of the optical apparatus according to claim 1,
The communication unit includes an electrical contact;
A plurality of the electrical contacts are provided adjacent to and substantially parallel to the edge of the opening,
The mounting structure for an optical device, wherein the protrusion is a single protrusion formed so as to extend substantially parallel to the plurality of electrical contacts. In the mount structure of the optical device according to claim 1 or 2,
An annular member formed in an annular shape, provided along a peripheral edge portion of a mount opening formed in the housing, and disposed on the subject side with respect to the surface portion of the opening defining member;
When the substantial rigid body is passed between the inner peripheral edge of the annular member and the tip of the protrusion, the protrusion and the electric contact are arranged so that the tip of the electric contact does not contact the substantial rigid body. Mounting structure for optical equipment, characterized by setting the protruding height of. In the mount structure of the optical apparatus according to claim 3,
Of the fastening object to be fastened to the optical device, a portion having the largest radial dimension in a portion to be inserted on the inner diameter side of the annular member at the time of fastening includes an inner peripheral edge portion of the annular member and a tip portion of the protruding portion. The mounting structure of the optical device is characterized in that the protruding portion and the protruding height of the electric contact are set so that the tip of the electric contact does not come into contact with the object to be fastened. In the mount structure of the optical instrument according to any one of claims 1 to 4,
The mounting structure for an optical device, wherein the opening formed in the opening defining member is circular. In the mount structure of the optical instrument according to any one of claims 1 to 5,
A mount structure for an optical device, wherein a reflection suppressing process for suppressing reflection of light is applied to a surface portion of the protruding portion facing the communication portion. An opening formed on the inner diameter side of a mount opening formed in the housing, having an opening for allowing subject light to pass therethrough, and having a surface portion facing the subject side substantially orthogonal to the traveling direction of the subject light A regulating member;
A communication unit provided to project from the surface portion of the aperture defining member toward the subject;
A mountable structure that can be attached to and detached from a mount structure of an optical device, and a protrusion that protrudes toward the subject side from a region between the communication portion and the opening in the surface portion of the opening defining member. An optical instrument comprising:
A communicated unit capable of communicating by being disposed opposite to the communication unit;
When the mounted structure is mounted on the mount structure, a storage portion that stores the protruding portion;
An optical apparatus comprising:

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