JPH0829662A - Mirror fixing device - Google Patents

Abstract

PURPOSE:To provide a mirror fixing device capable of stably and accurately attaching a mirror such as a half mirror in an optical equipment and making mirror size small. CONSTITUTION:In this mirror fixing device, a colliding surface 3 to which the end of the 1st surface of a mirror member 1 is pressed is formed on the mirror attaching surface of a mirror fixing member 2, and a pressing member 4 engaging with the end of the 2nd surface of the mirror member 1 pressed to the colliding surface 3 is provided on the mirror attaching surface, then a mirror fixing tool 5 fixing at least the one part of the end of the mirror member 1 different from the end thereof pressed to the colliding surface 3 is attached to the mirror fixing member 2.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mirror fixing device for identifying optical elements such as mirrors used in cameras, telescopes, microscopes, copying machines and the like.

[0002]

2. Description of the Related Art Various mirrors including, for example, a half mirror and a dichroic mirror are widely used in optical equipment. 5A and 5B are diagrams showing a configuration example of a conventional mirror fixing device.

In the mirror fixing device shown in FIG. 5 (a), the four sides of the mirror 31 are brought into contact with the window frame-shaped abutting surface 33a formed around the window 34 of the mirror fixing member 32, and are bonded or pressed (not shown). It is fixed using a member.

On the other hand, in the mirror fixing device shown in FIG. 5B, two opposite sides of the mirror 31 are brought into contact with a pair of opposing surfaces 33b sandwiching the window 34 of the mirror fixing member 32, It is fixed as in the case of FIG. Since the abutting surface 33b needs to be accurately provided on the same plane, the mirror fixing member 32 is an integral member.

When the mirror is actually used on an optical device, the mirror 31 is further fixed to the mirror fixing member 32.
Must be installed and fixed in place within the optical equipment. A method of fixing the mirror fixing member 32, which fixes the mirror 31 on the optical path in the optical device, is disclosed in, for example, Japanese Patent Laid-Open No. 5-72455. FIG. 6 (a),
(B) is a perspective view and a sectional view showing a method of fixing the mirror disclosed in Japanese Patent Laid-Open No. 5-72455 in an optical device.

[0006]

However, the conventional mirror fixing device described above has the following problems. (1) When the mirror is fixed to the mirror fixing member, two or four surfaces (or window frame shape) are required to form the mirror fixing member. In the case of the mirror to be used, it is necessary to increase the size of the mirror by the area of the opposing surface, which is costly. (2) Since the opposing surfaces that are the surfaces for fixing the mirror to the mirror fixing member are a plurality of surfaces or have a window frame shape, not only the fixing surface is not specified but the fixing accuracy stability is poor, but the fixing accuracy is increased. Have difficulty. (3) When the mirror body is fixed to the mirror fixing substrate in the optical device, a mounting error occurs when the mirror is fixed to the mirror fixing member, and further, when the mirror body is fixed to the mirror fixing substrate, a mounting error occurs. Since it occurs, the accuracy of mounting the mirror cannot be increased, and it becomes difficult to adjust the optical system.
Further, after the mirror 31 is attached to the mirror fixing member 32, the mirror fixing member 32 is further attached to the substrate 3 in the optical device.
Since it is necessary to attach it to No. 3, the work is complicated, the configuration is complicated, and it is difficult to handle, and the cost is high.

The present invention has been made in consideration of such a situation, and a mirror such as a half mirror can be stably and accurately mounted in an optical device, and a light shielding area due to the mirror mounting is small, An object of the present invention is to provide a mirror fixing device that can reduce the mirror size.

[0008]

In order to solve the above-mentioned problems, the invention according to claim 1 provides an opposing surface on which the end of the first surface of the mirror member is pressed against the mirror mounting surface of the mirror fixing member. An end of the mirror member different from the end pressed against the impact surface is provided on the mirror attachment surface with a pressing member that is formed and engages with the end of the second surface of the mirror member pressed against the impact surface. Is a mirror fixing device for attaching a mirror fixing tool for fixing at least one position to the mirror fixing member.

According to a second aspect of the invention, the mirror mounting surface of the mirror fixing member is formed with an abutting surface against which the first surface of the lower end portion of the mirror member is pressed, and the mirror is pressed against the abutting surface. A pressing member that engages with the second surface of the lower end of the member is provided on the mirror mounting surface, and an opening into which the upper end of the mirror member is inserted into a mirror fixing tool having a shape corresponding to the outer shape of the side surface and upper end of the mirror member. A mirror fixing device that forms a portion and fixes the upper end of the mirror member to the opening of the mirror fixing tool with an adhesive.

[0010]

Therefore, first, in the mirror fixing device according to the first aspect of the present invention, the end portion of the first surface of the mirror member is pressed against the abutting surface of the mirror fixing member to bring it into contact with the mirror fixing member for alignment. The mirror position is fixed at the first position, and the position can be adjusted with high accuracy and stability as compared with the case where the mirror surface is aligned with the two surfaces or the window frame-shaped opposing surface.

Next, the highly accurately aligned mirror member is pressed by the pressing member from the end of the second surface, and the pressing member is fixed to the mirror fixing member to fix the mirror member.

Further, a mirror fixing member is attached to the mirror fixing member, and the mirror member is fixed to at least one end portion of the mirror member different from the end portion pressed against the facing surface by the mirror fixing member.

Next, in the mirror fixing device of the present invention according to claim 2, in addition to the same operation as in the invention corresponding to claim 1, the mirror fixing device is adapted to the outer shape of the side surface and the upper end portion of the mirror member. The upper end of the mirror member is inserted into the opening, and the upper end of the mirror member is fixed to the opening of the mirror fixture with an adhesive. Therefore, the mirror member is sufficiently fixed, and the mirror member does not move even if an impact force due to vibration or drop is applied, and the optical performance can be maintained.

[0014]

DESCRIPTION OF THE PREFERRED EMBODIMENTS A mirror fixing device for fixing a partially transmissive mirror such as a half mirror on an optical path in an optical device will be described below as an embodiment of the present invention. FIG. 1 is a perspective view of a mirror fixing device according to an embodiment of the present invention. A front view of the mirror fixing device is shown in FIG. 2 (a), and a top view thereof is shown in FIG. 2 (b). A side view of the mirror fixing device is shown in FIG.

A half mirror 1 is attached to a mirror fixing substrate 2 which is fixed at a position facing an optical path in an optical device. The half mirror 1 has a constant thickness and has a rectangular shape.

The mirror fixing substrate 2 is a mount 12 having a convex cross section.
Is formed, and the width of the mounting base 12 is the same as the mounting side of the half mirror 1. This mount 12
A step portion is formed on the upper flat surface in a direction parallel to the width direction of the mounting base 12, and is divided into an upper step surface 12a and a lower step surface 12b. Then, at the boundary between the upper surface and the lower surface, the vertical cross section (1
2a, 12b), and a vertical surface 3 is formed. Since this mirror surface 3 is pressed against the mirror surface of the half mirror 1, it is finished to have a very high flatness.
Further, the height of the contact surface 3 is set to a minimum height at which the half mirror 1 does not fluctuate when the contact surface of the half mirror 1 and the contact surface 3 are brought into contact with each other when the mirror is fixed, which will be described later. .

A pair of screw holes 9 are provided on both side surfaces of the mount 12 formed on the mirror fixing substrate 2 at a position from the lower surface 12b to a distance corresponding to the thickness of the half mirror 1 from the abutting surface 3. ing.

On the lower surface 12b of the mounting base 12, there are two mirror holders 4 for fixing the lower end of the half mirror 1 in which the lower end of one mirror surface is pressed against the impact surface 3 so as to sandwich it from the opposite side. It is provided in place. The mirror presser 4 is made of a material thinner than the height of the abutting surface 3 and has a square or rectangular planar shape. The screw 8 is screwed into the screw hole provided in the mounting base 12 through the through hole formed in the mirror retainer 4 with respect to the lower step surface, and the mirror retainer 4 is pressed from above by the head of the screw 8 to obtain the mirror retainer 4 Are fixed to the mirror fixing substrate 2. The through hole of the mirror presser 4 has an oval shape, and the position of the mirror presser 4 can be adjusted by orienting the major axis direction of the through hole toward the impact surface 3.

The half mirror 1 whose lower end is fixed to the mirror presser 4 has a side surface and an upper end which are fixed to the mirror fixture 5.
Has been fixed by. The mirror fixture 5 is formed by bending a rectangular plate material having a predetermined thickness and width into a “U” shape, and includes a pair of parallel side plate portions 13.
It is composed of a top plate portion 14 which is perpendicular to the side plate portion 13. This mirror fixture 5 is used with its open side facing downward, and the inner surface spacing of the open parallel side plate portions 13 is approximately the same width as the length of the mounting side of the half mirror 1. . The top plate portion 14 of the mirror fixture 5 has a width slightly longer than the thickness of the half mirror 1 and is formed to a predetermined depth with a cut parallel to the longitudinal direction of the top plate portion 14 toward the open side.

Further, in the vicinity of both lower ends of the pair of side plate portions 13,
A circular or oval through hole 10 is formed. The through hole 10 corresponds to the screw hole 9. Due to the above-mentioned cut, a rectangular opening 11 that is larger than the thickness of the half mirror 1 and slightly longer than the mounting side of the half mirror 1 is formed in the top plate portion 14 of the mirror fixture 5. Also,
In the fixed state, the length of the side plate portion 13 and the position of the through hole 10 are designed so that the upper end of the opening 11 and the upper end of the half mirror 1 are almost at the same position. Then, in the mirror fixture 5, the upper end of the half mirror 1 which is adjusted in position and attached to the opening 11 is inserted, and the mirror surface opposite to the mirror surface in contact with the inner surface of the opening 11 is in contact with the mirror surface. The screws 6 are screwed into the corresponding screw holes 9 from the through holes 10 of the side plate portion 13 that are in contact with each other, and the positions of the screws 6 are adjusted with a margin between the through holes 10 and the screws 6, and the mirror fixing substrate 2 is fixed.

Further, the mirror fixture 5 has an adhesive 7 inserted into the opening 11 as shown in the figure, and the upper end of the half mirror 1 is fixed to the mirror fixture 5. The mirror fixing substrate 2 may be originally installed at a fixed position in the optical device for installing the half mirror 1 on the optical path, or the half mirror 1 may be fixed to the mirror fixing substrate 2. After that, it may be installed at a specific place in the optical device.

Next, the work for fixing the half mirror in the present embodiment having the above-mentioned structure will be described. First, the operator presses the lower part of one mirror surface of the half mirror 1 against the abutting surface 3 of the mirror fixing substrate 2 to align the surfaces and position them.

Next, while maintaining this state, the half mirror 1 is clamped by the mirror retainer 4 from the mirror surface opposite to the mirror surface applied to the abutting surface 3 so that the half mirror 1 does not move, and the screw 8 is directly attached to the mounting base 12. The mirror retainer 4 is fixed to the mirror fixing substrate 2 by screwing into the screw hole. As a result, the lower end of the half mirror 1 is fixed.

Next, the mirror fixture 5 is attached to the half mirror 1.
Then, the upper end portion of the half mirror 1 is inserted into the opening 11 of the mirror fixing tool 5 by covering it from above (in the direction of the arrow).
Then, as shown in FIGS. 2 and 3, one side surface 15 of the opening 11 formed in the mirror fixture 5 is pressed against the half mirror 1 from the mirror surface opposite to the mirror surface contacted with the facing surface 3. In this state, the mirror fixing tool 5 is fixed to the mirror fixing substrate 2 with the bolt 6. At this time, be careful not to move the half mirror 1.

Finally, the adhesive 7 is filled in the opening 11 of the top plate portion 14 of the mirror fixture 5, particularly the gap between the half mirror 1 and the opening 11, and the entire opening 11 is coated with the adhesive. , Fully fix the upper end of the half mirror 1 so that it does not move.

As described above, in the mirror fixing device according to the present embodiment, the abutting surface 3 is formed on the mounting base 12 of the mirror fixing substrate 2, and the half mirror 1 is positioned by only one abutting surface 3. Half mirror 1 with surface 3 and mirror holder 4
Since the lower end portion of the mirror is fixed, the number of the impact surface 3 that determines the mirror installation accuracy can be limited to one, and since the area is small, it is easy to process with high accuracy. Since the rattling does not occur when the surface is brought into contact with the surface, the half mirror 1 can be fixed with high accuracy. In addition, it is possible to suppress variations in quality between devices.

Further, since the upper end portion of the half mirror 1 is fixed by the mirror fixing tool 5 and the adhesive 7, the half mirror 1 is sufficiently fixed at the lower end portion and the upper end portion. The half mirror 1 does not move even if an impact force due to a drop or the like is applied, and optical performance can be maintained.

Further, since the half mirror 1 is fixed at two upper and lower ends and the left and right side ends are open, the mirrors should be effectively used especially when a light beam is obliquely incident. Therefore, the optical performance can be ensured with the minimum mirror size for the required luminous flux size.
This not only reduces the cost of the mirror, but also contributes to downsizing of the optical device.

If the member fixed to the mirror fixing substrate 2 is originally installed at a fixed position in the optical device,
After attaching the mirror to the mirror fixing member as before,
Further, it is not necessary to attach the mirror fixing member to the fixed position corresponding to the optical path in the optical device. That is, since the half mirror 1 can be attached to a required position on the optical path only by attaching the half mirror 1 directly to the mirror fixing substrate 2, the structure is simple and the attachment can be performed with high accuracy. Needless to say, for convenience of maintenance, the half mirror 1 may be fixed to the mirror fixing substrate 2 and then the half mirror 1 may be further installed at a specific place in the optical device.

If the surface of the mirror retainer 4 in contact with the half mirror 1 is parallel to the abutting surface 3 and is processed with high precision, the half mirror can be fixed more reliably.

Further, in the present invention, the highly accurate mounting of the half mirror 1 is performed by the contact surface between the abutting surface 3 and the mirror surface, while the purpose of the mirror fixing tool 5 is to reinforce the fixing of the half mirror 1. It is in. Therefore, in this embodiment, the mirror fixture 5 formed in a U shape is used,
Although the upper and lower ends of the mirror are fixed, the reinforcing method for fixing the mirror is not limited to this. For example, the mirror fixture 5
Instead of the above, a columnar fixture having a width that is equal to or less than the thickness of the half mirror 1 or is not much larger than the thickness above the lower surface 12b is attached to the mounting base 12, for example, by the method of the present embodiment. It is conceivable that the half mirror 1 is attached to one side or both sides of the thickness portion thereof, and the columnar fixture and the half mirror 1 are fixed with, for example, an adhesive to reinforce the fixing of the half mirror 1. At this time, not only the side surface of the half mirror 1 but also the upper end portion is opened, so that the half mirror 1 can be used more effectively.

FIG. 2 is a perspective view of a modified example of the above embodiment. The same parts as those in FIG. 1 are designated by the same reference numerals and the description thereof will be omitted. Only different parts will be described here. In FIG. 2, a part of the side plate portion 13 of the mirror fixture 5 corresponding to the position where the half mirror 1 is installed has a notch 13 such that the width of the side plate portion 13 is equal to or less than the thickness of the half mirror 1.
b is provided.

As described above, in the mirror fixing device according to the present embodiment, in addition to the structure of the previous embodiment, the mirror fixing tool 5 has the notch 13b in the side plate portion 13 of the half mirror 1, so that, for example, When the light flux enters from the side, the side plate portion 13 does not block the incident light at all, so that the mirror can be used more effectively, and further, the mirror can be made smaller.

Further, the same effects as those of the previous embodiment can be obtained such that the half mirror 1 can be fixed with high precision. Although the half mirror 1 is used as the mirror in the embodiments, the mirror used in the present invention may be any mirror having a property of transmitting a part of light, such as a dichroic mirror.

[0035]

As described above in detail, according to the present invention, a mirror such as a half mirror can be stably and accurately mounted in an optical device, a light shielding area due to the mirror mounting is small, and a mirror size can be reduced. It is possible to provide a mirror fixing device that can be made smaller.

[Brief description of drawings]

FIG. 1 is a perspective view of a mirror fixing device according to an embodiment of the present invention.

FIG. 2 is a front view and a top view of the mirror fixing device.

FIG. 3 is a side view of the mirror fixing device.

FIG. 4 is a perspective view of a mirror fixing device of a modified example of the embodiment according to the present invention.

FIG. 5 is a diagram showing a configuration example of a conventional mirror fixing device.

FIG. 6 is a configuration diagram showing a method of fixing a mirror disclosed in Japanese Patent Laid-Open No. 5-72455 in an optical device.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Mirror, 2 ... Mirror fixing board, 3 ... Impact surface, 4 ... Mirror presser, 5 ... Mirror fixing tool, 11 ... Opening part, 12 ... Mounting base, 12a ... Upper step surface, 12b ... Lower step surface, 13 ... Side plate part ,
13b ... Notch of mirror fixing tool.

Claims (2)

[Claims] 1. A mirror mounting surface of a mirror fixing member is formed with an impact surface against which an end portion of a first surface of the mirror member is pressed, and an end portion of a second surface of the mirror member pressed against the collision surface is formed. A pressing member to be engaged is provided on the mirror mounting surface, and a mirror fixing tool for fixing at least one end of the mirror member different from the end pressed against the impact surface is attached to the mirror fixing member. A mirror fixing device characterized in that. 2. The mirror mounting surface of the mirror fixing member is formed with an impact surface against which the first surface of the lower end of the mirror member is pressed.
A pressing member that engages with the second surface of the lower end of the mirror member pressed against the abutting surface is provided on the mirror mounting surface, and a mirror fixing tool having a shape corresponding to the outer shapes of the side surface and the upper end of the mirror member. An opening for inserting the upper end of the mirror member is formed in, and the upper end of the mirror member is fixed to the opening of the mirror fixture with an adhesive.