JP2002048960A - Mechanism for fixing optical element - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a mechanism for fixing an optical element which can reduce a space necessary for fixing the optical element and can firmly fix the optical element without adding a stress. SOLUTION: The mechanism for fixing the optical element has a prism assembly 5 formed with projecting parts, an intermediate member 9 abutting on the projecting parts to hold the prism assembly 5, a frame 3 which prevents the projecting parts from separating from the intermediate member 9 by abutting on the projecting parts and holding the intermediate member 9, and which are fastened to the intermediate member 9 by screws, light transmitting members 8a, 8b oppositely provided to the side face of the prism assembly 5, a coating member 10 to cover the prism assembly 5, and a finder part 11 to protect a user's eye.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an optical element fixing mechanism.

[0002]

2. Description of the Related Art Conventionally, an optical element is required for an optical device requiring a small volume, such as a portable camera or a head mounted image display device which is mounted on a head and displays a small liquid crystal image. There is known an optical element fixing mechanism for fixing the optical element.

As shown in FIG. 10, the conventional optical element fixing mechanism has a structure in which an optical element is fixed to a frame 20 installed in an optical device using screws. FIG. 10 shows a prism 21 as an optical element, and a flange 22 having a screw hole 22a and a positioning pin 22b is provided on both side surfaces of the prism 21 that do not act optically. The positioning pin 22b is fitted into the corresponding positioning hole 20a provided in the frame 20, and the screw 23 is inserted into the screw hole 22a of the prism 21 and screwed into the tap 20b provided on the frame 20, thereby forming the prism. 21 is fixed to the frame 20.

Another conventional optical element fixing mechanism uses an intermediate member 30 formed by bending a thin plate into an L-shape, as shown in FIG. The configuration is such that projections formed on upper and lower surfaces that do not act are held. The fixing is performed as follows. First, the positioning pin 32a provided on the projection 32 of the prism 31 which is an optical element is inserted into the positioning hole 3 provided on the frame 33.
3a, and one arm 30a of the L-shape of the intermediate member 30 is brought into contact with the surface opposite to the surface on which the projection 32 is fitted.
Next, the other arm 30b of the L-shape is
The intermediate member 30 located on the upper surface of the protrusion 32 and the upper surface of the frame 33 is connected to the frame 33 using screws 34.

[0005]

However, FIG.
In the fixing mechanism shown in (1), stress is applied to the optical element due to the tightening of the screw, and distortion occurs, so that the optical performance is deteriorated. If the stress is large, the optical element will be damaged.

The height y1 (dimension in the direction in which the flange projects from the optical element) of the flange through which the screw is inserted needs to be at least as large as the diameter of the screw head (typically 3 to 4 mm). Since the minimum value of the height y2 of the fixing mechanism is defined, miniaturization of the mechanism is limited.

[0007] The fixing mechanism as shown in FIG.
Since the optical element is held between the intermediate member and the frame, no stress is applied to the optical element. In addition, the height of the projection may be relatively low, and the height y3 of the fixing mechanism can be reduced as compared with the fixing mechanism in FIG. 10, so that the mechanism can be downsized. However, since a part of the holding of the optical element is carried by a thin plate that contributes to miniaturization, when an external force such as vibration or impact is applied to the optical element, the intermediate member is plastically deformed and the optical element is displaced. May occur.

Accordingly, an object of the present invention is to provide an optical element fixing mechanism capable of reducing the space required for fixing the optical element and firmly fixing the optical element without applying stress. It is to be.

[0009]

In order to achieve the above object, an optical element fixing mechanism according to claim 1 of the present invention comprises:
An optical element fixing mechanism for fixing an optical element to a frame, comprising an optical element and a frame, wherein the projection provided on the optical element and the projection of the optical element are supported from one side and coupled to the frame. The intermediate member, a projection support portion provided on the frame and supporting the projection portion from the other side, and the optical member provided on the frame and formed by the intermediate member and the projection support portion of the frame. And an intermediate member holding portion that holds the intermediate member so that the support of the projection of the element is maintained.

With this configuration, a large protrusion having a screw hole is not provided on the optical element as shown in FIG. 10, so that the space required for fixing can be reduced.

Further, since the optical element is fixed to the frame by utilizing the fact that the projection of the optical element is supported by the projection support of the frame and the intermediate member, the optical element is fixed without applying stress. can do.

Further, the optical element fixing mechanism is provided on the frame and has an intermediate member holding portion for holding the intermediate member, so that the intermediate member becomes plastic when an external force is applied to the optical element. Because it can prevent deformation
A strong fixation of the optical element can be achieved.

In the optical element fixing mechanism according to a second aspect of the present invention, the intermediate member is located between the intermediate member holding portion of the frame and the optical element.

[0014] With this configuration, the intermediate member can be easily held by the intermediate member holding portion without providing any special support means, so that the fixing mechanism can be simplified.

In the optical element fixing mechanism according to a third aspect of the present invention, the intermediate member holding portion of the frame is provided with a pressing means for pressing the intermediate member toward the optical element.

According to this structure, since the intermediate member pressed by the screw is pressed against the optical element, a more secure fixing without rattling can be guaranteed. Further, since the screw is not configured to directly push the optical element and stress is not concentrated on the optical element, the optical performance of the optical element is not deteriorated.

In the optical element fixing mechanism according to a fourth aspect of the present invention, the projection of the optical element has an optical element positioning section, and the projection supporting section of the frame has a frame positioning section. The optical element positioning section and the frame positioning section cooperate with each other to determine a relative position therebetween.

With this configuration, the optical element is accurately positioned and fixed on the frame.

The optical element fixing mechanism according to claim 5 of the present invention further includes a light transmitting member facing the optically acting surface of the optical element, and the intermediate member holds the light transmitting member. And a light transmitting member holding means.

With this configuration, the optical element can be protected.

The optical element fixing mechanism according to claim 6 of the present invention further comprises a covering member for covering the intermediate member and the optical element, and the covering member is provided on an optically acting surface of the optical element. And an elastic material provided with a light opening.

With this configuration, the user of the optical apparatus does not directly touch a portion of the optical element that protrudes from the fixing mechanism, such as a protrusion.

In the optical element fixing mechanism according to a seventh aspect of the present invention, the covering member includes a finder portion made of an elastic material that transmits light around a light opening of the covering member. It is characterized by.

When the user of the optical apparatus uses the optical apparatus by positioning the optical element in front of his / her eyes, this configuration prevents the user's eyeball from directly contacting the optical element. Further, since the finder portion is made of a material that transmits light, the field of view blocked by the fixing mechanism can be reduced.

[0025]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An optical element fixing mechanism according to an embodiment of the present invention will be described with reference to FIGS.
First, an optical element fixing mechanism according to a first embodiment of the present invention will be described with reference to FIGS. Here,
FIG. 1 is an exploded perspective view showing the configuration of the optical element fixing mechanism, and FIG.
3 is a longitudinal sectional view of the optical element fixing mechanism.

A prism 1 used as an optical element is fixed to a frame 3 via an intermediate member 2. By attaching the frame 3 to which the prism 1 is fixed to an optical device, the prism 1 is positioned and fixed to the optical device.

The prism 1 has a substantially triangular prism shape and has three side surfaces 1a, 1b and 1c. The light beam using the prism 1 enters from the side surface 1a, is reflected by the side surface 1b, and exits from the side surface 1c. The prism 1 has a first projection 1d for positioning and a second projection 1f for positioning having a projection 1e formed on the upper and lower surfaces thereof, respectively. The height of the first and second protrusions is about 1 mm.

The intermediate member 2 is formed by bending a plate that is thinner than the height of the projection, and is formed in a shape that substantially covers the upper and lower surfaces of the prism 1. There are two upper and lower bent portions 2a and 2b for positioning the projection 1d and the second projection 1f in contact with the frame 3 for positioning.

Further, the intermediate member 2 includes a prism 1
Window 2c for passing the light beam incident on the frame 3, and upper and lower side screw holes 2d, 2e, 2 for fixing to the frame 3.
f are formed.

The frame 3 is a substantially box-shaped member.
Three screw holes 3a, 3b, 3 formed at positions corresponding to the screw holes 2d, 2e, 2f on the upper and lower side surfaces of the intermediate member 2.
c, the upper and lower intermediate member holding portions 3d having a thickness of about 1 mm, which are inserted and positioned between the two bent portions 2a and 2b, and the vertical direction provided on these intermediate member holding portions 3d. , A first end face 3f for positioning by contacting the first projection 1d of the prism 1, and a positioning by contacting the second projection 1f of the prism 1. The second end face 3g to be performed and the second protrusion 1
A concave portion 3h for fitting and positioning with the convex portion 1e formed in f, and a window frame portion 3i for passing the light beam incident on the prism 1 are formed.

In such a configuration, when assembling and fixing the prism 1, the intermediate member 2 is attached to the prism 1, and the first and second projections 1 d and 1 f of the prism 1 are connected to the intermediate member 2. And the frame 3 is assembled from the outside of the intermediate member 2 so that the intermediate member holding portion 3d is located on the intermediate member and between the bent portions 2a and 2b. Insertion,
The second protrusion 1f of the prism 1 is provided in the recess 3h of the frame 3.
Of the first and second projections 1d and 1f.
Between the bent portions 2a and 2b of the intermediate member 2 and the first end surfaces 3f and 3g of the frame 3.

Thus, the prism 1 is vertically positioned with the upper and lower surfaces sandwiched by the intermediate member 2, and within this surface, the bent portions 2 a and 2 b of the intermediate member 2 and the first end surface 3 f of the frame 3 are located. , 11g, and is positioned in one direction. In the direction intersecting with this, the protrusion 1e of the second protrusion 1f and the recess 3h formed on the second end face 3g of the frame 3 are fitted. , The spatial arrangement is completely determined.

Thereafter, the screw holes 3a, 3b,
By screwing screws 3j, 3k, and 3l in common with 3c and screw holes 2d, 2e, and 2f of intermediate member 2, they are integrally fixed. Further, the intermediate member 2 is turned into the prism 1 by screwing the potato screw 3n into the tap hole 3e.
Has been pressed against.

In the optical element fixing mechanism according to the first embodiment of the present invention configured as described above, the protrusion having a screw hole requiring a height of 3 mm to 4 mm is a prism. Instead of about 1
2 mm, the height of the fixing mechanism is substantially the same as the height of the prism including the protrusion, and the height of the fixing mechanism and the height of the prism, as shown in FIG. Since the difference from the height is only about 2 mm, the space required for fixing can be reduced.

Next, an optical element fixing mechanism according to a second embodiment of the present invention will be described with reference to FIG. put it here,
FIG. 3 is an exploded perspective view showing the configuration of the optical element fixing mechanism according to the present embodiment.

Most of the configuration of the present embodiment is basically the same as most of the configuration of the first embodiment. In the following embodiments, components that are substantially the same as the components described in the first embodiment with reference to FIGS. 1 and 2 correspond to the corresponding components in the first embodiment. Are given the same reference numerals as those used to designate, and detailed description is omitted.

The configuration of the present embodiment differs from the configuration of the first embodiment in the configuration of the optical element. A prism assembly 5 used as an optical element includes a first prism 1 which is the same as in the first embodiment, and a second prism 4 adhered to a side surface 1d of the prism 1. The same intermediate member and frame as those in the first embodiment are used. The intermediate member 2 and the frame 3 hold and fix only the first prism 1.
Is held by bonding to the prism 1. The first light beam incident from 1a is reflected by 1d and is reflected by 1c
Emitted from The second light beam incident from 4a passes through 1d and exits from 1c.

In the optical element fixing mechanism according to the second embodiment of the present invention configured as described above, the optical element is fixed if a projection slightly protruding from the optical element is formed. Therefore, a combination of a plurality of optical elements and other more complicated optical elements can be fixed.

Next, an optical element fixing mechanism according to a third embodiment of the present invention will be described with reference to FIG. put it here,
FIG. 4 is an exploded perspective view showing the configuration of the optical element fixing mechanism according to the present embodiment.

Most of the configuration of the present embodiment is basically the same as most of the configuration of the second embodiment. Note that, in the following embodiment, components that are substantially the same as the components described with reference to FIG.
The same reference numerals as those in the second embodiment denote corresponding components, and a detailed description thereof will be omitted.

The configuration of the present embodiment is different from the configuration of the second embodiment in that in the second embodiment, the second protrusion 1f is provided with a projection 1e, and the second Although the recess 3h is provided on the end face 3g, in the present embodiment, the recess 1e 'is provided on the second protrusion 1f', and the protrusion 3h 'is provided on the second end face 3g'. It is that you are.

Even if the optical element fixing mechanism according to the third embodiment of the present invention configured as described above is used, the optical elements can be accurately positioned and fixed.

Next, an optical element fixing mechanism according to a fourth embodiment of the present invention will be described with reference to FIG. put it here,
FIG. 5 is an exploded perspective view showing the configuration of the optical element fixing mechanism of the present embodiment.

Most of the configuration of the present embodiment is basically the same as most of the configuration of the second embodiment. Note that, in the following embodiment, components that are substantially the same as the components described with reference to FIG.
The same reference numerals as those in the second embodiment denote corresponding components, and a detailed description thereof will be omitted.

The configuration of the present embodiment differs from the configuration of the second embodiment in the configuration of the intermediate member. The intermediate member 6 of the present embodiment has the same window 6c as the window 2c of the intermediate member 2 of the second embodiment. From upper and lower end surfaces of the window portion 6c, light-shielding plates 6d and 6e for vertically blocking light and extending along the upper and lower surfaces of the prism assembly 5 extend therefrom. Is folded and stacked. The two bent portions 2 of the intermediate member 2 according to the second embodiment are provided on the side of the light shielding plate 6d near the window 6c.
Two bent portions 6a and 6b are formed, which are the same as the bent portions 6a and 6b. The same screw holes as those of the second embodiment are formed.

When attaching the prism assembly 5 to the intermediate member 6, the upper and lower light shielding plates 6a and 6b are elastically deformed to push the bent portion up and down, so that the upper and lower surfaces of the prism assembly 5 and the frame 3 The prism assembly 5 is inserted into the intermediate member 6 such that the opposite side surface is covered. Thereafter, the fixing mechanism is assembled as in the first embodiment.

In the optical element fixing mechanism according to the fourth embodiment of the present invention configured as described above, unnecessary light incident on the optical element can be prevented by providing the light shielding plate. Can be shut off.

Next, an optical element fixing mechanism according to a fifth embodiment of the present invention will be described with reference to FIG. put it here,
FIG. 6 is an exploded perspective view showing the configuration of the optical element fixing mechanism according to the present embodiment.

Most of the configuration of the present embodiment is basically the same as most of the configuration of the fourth embodiment. In the following embodiment, components that are substantially the same as the components described in the fourth embodiment with reference to FIG.
The same reference numerals as those in the fourth embodiment denote the corresponding components, and a detailed description thereof will be omitted.

The structure of this embodiment differs from the structure of the fourth embodiment in the structure of the intermediate member. The intermediate member 7 of the present embodiment has a covering side surface 7f that faces the frame 3 and covers the side surface of the prism assembly 5 opposite to the frame 3. A light-shielding plate 7 is disposed to face up and down from the upper and lower end surfaces of the covering side surface 7f to block light.
d and 7 e extend toward the frame 3. Light shield 7
The same portions as the bent portions and the screw holes of the fourth embodiment are formed on the sides of d and 7e close to the frame 3. From the side end surface of the covering side surface 7f, a frame portion 7h provided with a window portion 7g through which the side surface 1c of the prism 1 of the prism assembly 5 can be viewed from outside extends toward the frame 3. The same thing as the screw hole of the fourth embodiment is formed in the frame portion 7h.

When the prism assembly 5 is attached to the intermediate member 7, the upper and lower light shielding plates 7a and 7b are elastically deformed so that the bent portions are pushed up and down, and the upper and lower surfaces of the prism assembly 5 and the frame 3 are connected to each other. The prism assembly 5 is inserted so that the opposite side surface is covered. Thereafter, the fixing mechanism is assembled as in the first embodiment.

In the optical element fixing mechanism according to the fifth embodiment of the present invention, which is configured as described above, since the light shielding plate is provided, unnecessary light incident on the optical element is prevented. Can be shut off.

Further, the distance between the bent portion of the intermediate member 7 in the present embodiment and the covering side surface to which the light shielding plate is joined is equal to the distance between the bent portion of the intermediate member 6 and the light shielding plate in the fourth embodiment. Since the fixing mechanism of the present embodiment is larger than the fixing mechanism of the fourth embodiment when the optical element is attached to the intermediate member by expanding the bent portion up and down as compared with the fixing mechanism of the fourth embodiment. No large force is required to spread the douser.

Next, an optical element fixing mechanism according to a sixth embodiment of the present invention will be described with reference to FIG. put it here,
FIG. 7 is an exploded perspective view showing the configuration of the optical element fixing mechanism according to the present embodiment.

Most of the structure of the present embodiment is basically the same as most of the structure of the fifth embodiment. In the following embodiments, components substantially the same as the components described in the fifth embodiment with reference to FIG.
The same reference numerals as those in the fifth embodiment denote the corresponding components, and a detailed description thereof will be omitted.

The configuration of the present embodiment differs from the configuration of the fifth embodiment in that it further has light transmitting members 8a and 8b that have been subjected to a hard coating process, and that the configuration of the present embodiment is different. The intermediate member 9 further has guide portions 9i and 9j for holding these light transmitting members 8a and 8b. The light transmitting members 8a and 8b are arranged to face the side surface 1c of the first prism 1 and the side surface 4a of the second prism 4 constituting the prism assembly 5, respectively. Most of the configuration of the intermediate member 9 of the present embodiment is basically the same as most of the configuration of the intermediate member 7 of the fifth embodiment. The configuration of the intermediate member 9 is different from the configuration of the intermediate member 7 in that the guide portion 9i is formed on the frame portion 9h corresponding to the frame portion 7h of the intermediate member 7 and the covering side surface 7f of the intermediate member 7 corresponds. And a frame portion 9k extending from the covering side surface 9f to face the frame portion 7h.
Is formed with a guide portion 9j. The guide portions 9i and 9j are formed by bending upper and lower end surfaces of the frame portions 9h and 9k. The frame 9k is formed with a window 91 that allows the side surface 4a of the prism 4 of the prism assembly 5 to be viewed from the outside.

The optical element fixing mechanism according to the sixth embodiment of the present invention configured as described above has a light transmitting member which has been subjected to a hard coating process. Since the portion that can be seen from the outside of the element is covered and not exposed, the optical element can be protected from scratches and dirt. Further, even if stains such as fingerprints adhere to the light transmitting member, it can be easily removed.

In this embodiment, the light transmitting member is made of a material which has been subjected to a hard coating process.
The present invention is not limited to this, and may be made of, for example, a material that has been subjected to an AR coating treatment.
Further, both the hard coat and the AR coat may be applied. When the optical element is made of a resin, the light transmitting member may be made of a UV cut filter. In this case, it is possible to prevent the ultraviolet light from being incident on the resin optical element from the outside and deteriorating the material. Further, it may be constituted by a color filter or an ND filter.

Next, an optical element fixing mechanism according to a seventh embodiment of the present invention will be described with reference to FIG. put it here,
FIG. 8 is an exploded perspective view showing the configuration of the optical element fixing mechanism according to the present embodiment.

Most of the configuration of the present embodiment is basically the same as most of the configuration of the sixth embodiment. Note that, in the following embodiment, components that are substantially the same as the components described with reference to FIG.
The same reference numerals as those in the sixth embodiment denote corresponding components, and the detailed description thereof will be omitted.

The configuration of the present embodiment is different from the configuration of the sixth embodiment in that a coating member 10 for covering the outer periphery of the intermediate member 9 and the prism assembly 5 is further provided. The covering member 10 is made of an elastic material, and has openings 10a and 10b formed in portions facing the side surface 1c of the prism 1 and the side surface 4a of the prism 4, respectively.

In the optical element fixing mechanism according to the seventh embodiment of the present invention configured as described above, the protrusions such as the protrusions of the prism 1 and the bent parts of the intermediate member 9 are elastic. Because it is covered, the user of the optical device does not touch these protrusions, and when the user touches the corners of the covered protrusion, the sharp feeling of the corners is reduced.
Further, the impact applied to the optical element is reduced, and the optical element is protected from dirt.

Since the surface of the optical element from which light does not enter or exit is covered, unnecessary light from entering the optical element can be blocked.

Next, an optical element fixing mechanism according to an eighth embodiment of the present invention will be described with reference to FIG. put it here,
FIG. 9 is an exploded perspective view showing the configuration of the optical element fixing mechanism according to the present embodiment.

Most of the structure of the present embodiment is basically the same as most of the structure of the seventh embodiment. In the following embodiment, components that are substantially the same as those described with reference to FIG.
The same reference numerals as those in the seventh embodiment denote corresponding components, and a detailed description thereof will be omitted.

The configuration of the present embodiment is different from the configuration of the seventh embodiment in that the covering member 10 further includes a finder portion 11 made of an elastic material that transmits light around the optical opening 10a. Is to have. The finder section 11 has a ring shape. The inner periphery of the finder section 11 is attached so as to surround the periphery of the optical aperture 10a.
The outer periphery of the finder portion 11 projects outward from the surface of the covering member 10 to which the inner periphery is attached. The user makes his or her eyes face the side surface 1c of the prism 1 with the finder section 11 interposed therebetween, and observes an image carried by the light beam emitted from the side surface 1c.

In the optical element fixing mechanism according to the eighth embodiment of the present invention configured as described above, a flexible finder section made of an elastic material is provided between the eye and the fixing mechanism. With this configuration, even when the fixing mechanism approaches the eye, the finder portion flexibly contacts the bone around the eye, so that the eye can be prevented from directly contacting the fixing mechanism.

When the fixing mechanism is positioned near the eye and another object is observed, if the finder overlaps the object and is included in the field of view, the finder is made of a material that transmits light. Thus, even in such a case, the field of view blocked by the fixing mechanism can be reduced, and a relatively wide field of view can be secured.

It should be noted that the present invention is not limited to the above-described embodiment, and it is needless to say that various modifications and applications are possible without departing from the spirit of the invention.

[0070]

As is clear from the above description,
In the optical element fixing mechanism according to the present invention, the space required for fixing the optical element can be reduced, and the optical element can be firmly fixed without applying stress.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view showing a configuration of an optical element fixing mechanism according to a first embodiment of the present invention.

FIG. 2 is a longitudinal sectional view of the optical element fixing mechanism according to the first embodiment of the present invention.

FIG. 3 is an exploded perspective view illustrating a configuration of an optical element fixing mechanism according to a second embodiment of the present invention.

FIG. 4 is an exploded perspective view illustrating a configuration of an optical element fixing mechanism according to a third embodiment of the present invention.

FIG. 5 is an exploded perspective view illustrating a configuration of an optical element fixing mechanism according to a fourth embodiment of the present invention.

FIG. 6 is an exploded perspective view showing a configuration of an optical element fixing mechanism according to a fifth embodiment of the present invention.

FIG. 7 is an exploded perspective view showing a configuration of an optical element fixing mechanism according to a sixth embodiment of the present invention.

FIG. 8 is an exploded perspective view showing a configuration of an optical element fixing mechanism according to a seventh embodiment of the present invention.

FIG. 9 is an exploded perspective view showing a configuration of an optical element fixing mechanism according to an eighth embodiment of the present invention.

FIG. 10 is an exploded perspective view showing a configuration of a conventional optical element fixing mechanism.

FIG. 11 is an exploded perspective view showing a configuration of another conventional optical element fixing mechanism.

[Description of Signs] 1 First prism 1d First protrusion 1e Projection 1f Second protrusion 3 Frame 3d Intermediate member holding portion 3e Tap hole 3f First end face 3g Second end face 3h Concave part 4 Second 5 prism assembly 8a light transmitting member 8b light transmitting member 9 intermediate member 10 covering member 10a light opening 11 finder section

Claims (7)

[Claims] 1. An optical device comprising an optical element and a frame,
An optical element fixing mechanism for fixing an optical element to a frame, comprising: a projection provided on the optical element; an intermediate member supporting the projection of the optical element from one side and coupled to the frame; And a projection supporting portion supporting the projection from the other side, and a projection supporting portion provided on the frame, so that the intermediate member and the projection supporting portion of the frame support the projection of the optical element. And an intermediate member holding portion for holding the intermediate member. 2. The optical element fixing mechanism according to claim 1, wherein the intermediate member is located between an intermediate member holding portion of the frame and an optical element. 3. The optical element fixing mechanism according to claim 2, wherein the intermediate member holding portion of the frame is provided with pressing means for pressing the intermediate member toward the optical element. 4. The projection of the optical element has an optical element positioning section, and the projection supporting section of the frame has a frame positioning section, and the optical element positioning section and the frame positioning section are 4. The method according to claim 1, wherein the relative positions are determined in cooperation with each other.
The optical element fixing mechanism according to claim 1. 5. An optical element further comprising a light transmitting member facing an optically active surface of the optical element, wherein the intermediate member comprises:
The optical element fixing mechanism according to any one of claims 1 to 4, further comprising a light transmitting member holding unit that holds the light transmitting member. 6. An optical element further comprising a covering member for covering the intermediate member and the optical element, wherein the covering member is made of an elastic material having an optical opening on an optically active surface of the optical element. The optical element fixing mechanism according to any one of claims 1 to 5, wherein: 7. The optical element according to claim 6, wherein the covering member includes a finder portion made of an elastic material that transmits light, around a light opening of the covering member. Fixing mechanism.