JPS61102616A - Jig and method for fixing optical device - Google Patents

Abstract

PURPOSE:To eliminate the inflection of lines of magnetic force, to eliminate damage to respective optical components, and to facilitate attachment and detachment by using a fixing jig made of nonmagnetic metal and fixing the optical components with the elastic force of the elastic body of the fixing jig. CONSTITUTION:Incidence and projection surfaces of a magneto-optic crystal body 1 and optical components 2 and 3 are pressed into contact with the elastic forces of elastic bodies stuck on both surfaces of a vertical member 22 and fixed. Further, there is none of the vertical member 22, elastic member 22, and elastic bodies 25 and 26 at the part of an optical path 4 where light is projected. Thus, a pressure plate 20 is mounted on the fixing jig body 16, which is inserted into the rectangular hole of a magnet 5 while the magneto-optic crystal body 1 and optical components 2 and 3 are fixed. Namely, the reverse surface of a bottom plate 17 is placed on the bottom surface of the rectangular hole and inserted into the rectangular hole as shown by an arrow P. Consequently, the elastic bodies 23 and 24 stuck on a horizontal member 21 deform elastically and are compressed to fix the fixing jig at a specific position in the rectangular hole. Consequently, none of optical components damages, so the attachment and detachment are facilitated.

Description

Detailed Description of the Invention [Field of Industrial Application] The present invention relates to an optical device, particularly a fixture for an optical device comprising a magneto-optic crystal and a plate-shaped or prism-shaped optical component, and a fixture for an optical device. Regarding the fixing method.

Optical devices that are constructed by combining multiple optical components made of optical crystals or optical glass must be removably assembled and fixed using a fixing jig before being fixed as an optical device with an adhesive or the like. It is common to conduct characteristic tests using

When fixing this optical device, not only is it easy to attach and detach each optical component, but also a fixing means that does not damage the optical components is required.

FIG. 3 is a perspective view of an optical device in which one of the constituent elements is a magneto-optic crystal.

The optical device shown in FIG. 3 is an optical isolator, and is composed of a magneto-optic crystal 1, an optical component 2.3, and a magnet 5 that forms a magnetic field.

A magneto-optic crystal body formed in a parallelepiped shape (for example, YIG
)1 is a Faraday rotator. The exit surface of the optical component 2, which is a polarizing prism, is in close contact with the entrance surface on one side of the magneto-optic crystal 1, and the entrance surface of the optical component 3, which is a polarizing prism, is in close contact with the exit surface on the other side. Magneto-optic crystal 1. The upper surfaces of each of the optical components 2.3 are fixed with adhesive T and are integrated into a rectangular hexahedron shape.

The magnet 5 is a permanent magnet, and its axial center is aligned in the direction of the magnetic field (arrow H
1. A square hole is provided into which the optical component 2.3 is inserted and fixed with adhesive or the like.

This optical isolator is an optical component 2 that allows light to enter the optical component 2 in the forward direction. The magneto-optic crystal 1° is refracted by the optical component 3, and exits from the output surface of the optical component 3 as an output light parallel to the incident light of the optical component 2, as shown in the optical path 4. Since the polarization plane of the light in the opposite direction is rotated by 90 degrees from the light in the forward direction by the magneto-optic crystal body 1, it is refracted by the optical component 2 at an angle different from that of the light incident in the forward direction, and is reflected by the optical component 2. The light is emitted from the incident surface. Therefore, it has the function of an optical isolator.

Optical devices constructed by combining multiple optical components made of optical crystals or optical glasses must be removably assembled and tested for characteristics before being fixed together as an optical device with an adhesive or the like. This is common.

When performing a characteristic test of such an optical device, the magneto-optic crystal 1. If the optical components 2 and 3 are integrated, it goes without saying that each optical component cannot be adjusted, and the adhesive T must be peeled off when replacing the optical components. adhesive T
When peeled off, the magneto-optic crystal 1. Both optical components are brittle crystals and are susceptible to damage.

In order to avoid these problems, when testing the characteristics of optical devices, magneto-optic crystals 1. A fixing jig is used to removably fix the entrance and exit surfaces of the optical components 2 and 3 in close contact with each other.

[Conventional technology]

FIG. 4 is a perspective view showing a conventional fixing jig in separated form.

In FIG. 4, the fixing jig main body 6 is made of non-magnetic metal (for example, brass), and a pair of side plates 8 and 9 are provided perpendicularly to the side edges on both sides of the bottom @ 7, forming a groove shape. has been done.

One side of the side plate 8 is provided with a notch 8A so as not to block the incident light on the optical path 4. Furthermore, a notch 9A is provided on the side portion of the side plate 9 in a diagonal direction from the notch 8A so as not to block the emitted light.

Furthermore, the upper portions of the side plates 8 and 9 are each bent outward, and a screw hole 10 is provided vertically in the bent plate portion.

The exit surface of the optical component 2 is in close contact with the entrance surface on one side of the magneto-optic crystal 1, and the entrance surface of the optical component 3 is in close contact with the exit surface on the other side of the magneto-optic crystal l. They are assembled and inserted into the fixing jig main body 6 so that their bottom surfaces are placed on the top surface of the bottom plate 7.

A magneto-optic crystal body 1 is attached to the fixing jig main body 6. Optical parts 2.3
When the fixing jig main body 6 is inserted into the square hole of the magnet 5 with the combination of the ) to,
Only the magneto-optic crystal 1 is attracted, causing a positional shift.

In order to prevent this, after the magneto-optic crystal 1.degree. optical components 2.3 are combined and inserted into the fixing jig main body 6, the upper surfaces of these optical components are pressed with the presser plate 11.

The holding plate 11 is a rectangular plate made of non-magnetic metal (for example, brass), and is provided with holes 12 for inserting machine screws (not shown) at positions corresponding to the respective screw holes 10. By inserting a small screw into this hole 12 and screwing it into the screw hole 10, the magneto-optic crystal 1. It is configured to press against the upper surface of the optical component 2.3.

In addition, the fixing jig main body 6. Holding plate 11. Since it is made of non-magnetic metal, the lines of magnetic force will not bend even if it is inserted into the square hole of the magnet 5. Therefore, the magneto-optic crystal body 1 is not adversely affected.

[Problem that the invention seeks to solve]

However, in the above conventional fixing method, the holding plate made of a hard metal plate directly attaches to the fragile magneto-optic crystal.

(A fixing jig with a structure that presses the top surface of the optical component is used.On the other hand, if the small screw is excessively tightened, there is a problem that the expensive magneto-optic crystal and the optical component will be damaged.

Also, if you tighten the machine screws with weak force to avoid damage,
There is a problem that the magneto-optic crystal may be misaligned due to insufficient fixation.

[Means for solving problems]

The above-mentioned conventional problem lies in the fact that the entrance and exit surfaces of an optical device, which is composed of a rectangular parallelepiped or parallelepiped magneto-optic crystal and one or more plate-shaped or prism-shaped optical components, are brought into close contact with each other. In fixing the cough light device, a bottom plate made of non-magnetic metal and in close contact with a surface parallel to the optical path of the cough light device, and a base plate provided on both sides of the bottom plate perpendicular to the bottom plate and so as not to obstruct the optical path. The groove-shaped fixing jig body consisting of a pair of side plates and the holding plate body are angle-shaped and made of non-magnetic metal, and plate-shaped elastic bodies are fixed to the upper and lower surfaces of the horizontal member and the side surfaces of the vertical member, respectively. Using a fixing jig consisting of a presser plate made of This problem is solved by the means of the present invention, in which the magneto-optic crystal body and the entrance/exit surface of the optical component are closely fixed by the elasticity of the respective elastic bodies.

[Effect]

According to the above means of the present invention, one entrance/exit surface of the magneto-optic crystal or one entrance/exit surface of the optical component is attached to the inner surface of one side plate of the fixing jig body. With the bottom surface of the component in close contact with the top surface of the bottom plate of the fixing jig main body, the other entrance/exit surface of the magneto-optic crystal or the other entrance/exit surface of the optical component is connected to the elastic body fixed to the vertical member. Pressed by elasticity. Therefore, the corresponding entrance/exit surfaces of the magneto-optic crystal and the optical component can be closely combined and fixed as desired without fear of damage to the magneto-optic crystal and the optical component.

In addition, with the fixing jig inserted into the square hole of the magnet, the upper surfaces of the magneto-optic crystal and the optical component are pressed by the elasticity of the elastic body fixed to the horizontal member. Therefore, the magneto-optic crystal is prevented from floating upward due to the magnetic force of the magnet, and the axis of the magneto-optic crystal does not shift.

In addition, when inserting the holding plate into the fixing jig body and when inserting the fixing jig into the magnet, an elastic body intervenes and presses the magneto-optic crystal and optical components. , No special precautions are required and attachment/detachment work is easy.

〔Example〕

The gist of the present invention will be specifically explained below with reference to illustrated examples. Note that the same reference numerals refer to the same objects throughout the plan.

FIG. 1 is a perspective view showing an embodiment of the present invention, in which the fixing jig is shown separated, and FIG. 2 is a side sectional view of the fixing jig in a state where it is inserted into a magnet.

In FIG. 1, the fixing jig main body 16, which is open at the top, is made of non-magnetic metal (for example, yellow tR), and a pair of side plates 18 and 19 are provided perpendicularly to the side edges on both sides of the bottom plate 17.
is provided and is configured in a groove shape.

Note that the distance between the side plate 18 and the side Vi19 is as follows: optical component 2° magneto-optic crystal body 1. It is desirably larger than the length of a rectangular hexahedron in which the respective entrance and exit surfaces of the optical component 3 are brought into close contact.

One side of the side plate 18 is provided with a notch 18A so as not to block the incident light on the optical path 4. Also, side plate 1
A notch 19A is provided on the side diagonally from the notch 18^ of 9 so as not to block the emitted light.

The presser plate 20 has a horizontal member 21 of an angle-shaped presser plate body made of non-magnetic metal (e.g. brass), and a plate-shaped elastic body (e.g. rubber, sponge, etc.) 23 is adhered to the lower surface of the horizontal member 21. A plate-shaped elastic body 24 is attached. Further, an elastic body 25 is attached to the inside of the vertical member 22, and an elastic body 26 is attached to the outside.

Note that the length of the horizontal member 21 is the same as that of the optical component 2. Magneto-optic crystal 1. The entrance and exit surfaces of each optical component 3 are placed in close contact with each other.
The height of the vertical member 22 is approximately equal to the length of the rectangular solid.
The height of the magneto-optic crystal body 1 is approximately equal to that of the magneto-optic crystal body 1.

Since the fixing jig of the present invention is configured as described above,
The exit surface of the optical component 2 is combined with the entrance surface of the magneto-optic crystal 1, and the exit surface of the optical component 3 is combined with the exit surface of the magneto-optic crystal 1, and the entrance surface of the optical component 2 is applied to the inner surface of the side plate 18. Then, the magneto-optic crystal 1 and the optical components 2 and 3 are inserted into the fixture main body 16 so that the bottom surfaces of the magneto-optic crystal 1 and the optical components 2 and 3 come into close contact with the top surface of the bottom plate 17 of the fixture main body 16.

Thereafter, the elastic body 23 attached to the horizontal member 21 is attached to the magneto-optic crystal body 1. Push the presser plate 20 toward the fixing jig main body 16 so that it comes into contact with the upper surface of the optical component 2.3 and the vertical member 22 is between the optical component 3 and the side plate 19.

As a result, the magneto-optic crystal 1. The corresponding entrance and exit surfaces of the optical component 2.3 are pressed by the elasticity of the elastic bodies 25, 26 attached to both sides of the vertical member 22 and are tightly fixed. At this time, the output surface of the optical component 3 directly contacts and slides on the elastic body 25, but since the elastic body 25 is soft and elastic, the optical component 3 is not damaged. In addition, a vertical member 22 and an elastic body 25 are provided at the exit portion of the optical path 4.
．． Of course, since there is no 26, there will be no scratches.

In this way, the holding plate 20 is attached to the fixing jig main body 16,
Magneto-optic crystal 1. With optical component 2.3 fixed,
When the fixing jig is inserted into the square hole of the magnet 5, the fixing jig can be fixed in the square hole of the magnet 5, as shown in FIG.

That is, the lower surface of the bottom plate 17 is placed on the bottom surface of the square hole, and the bottom plate 17 is inserted into the square hole from the direction of arrow P. This allows the horizontal member 2
1 is elastically deformed and compressed, and the fixing jig can be inserted into a desired position within the square hole. The fixing jig is fixed by the elasticity of the elastic bodies 23 and 24.

In this state, the upper surfaces of the magneto-optic crystal 1 and the optical component 2.3 are pressed by the elasticity of the elastic bodies 23 and 24. Therefore, the magneto-optic crystal 1 is prevented from floating due to the magnetic force of the magnet.

In addition, in both cases of attaching the holding plate 20 and attaching the magnet 5 of the fixing jig, an elastic body is interposed and the magneto-optic crystal body 1 is
．． Since the optical components 2 and 3 are pressed, there is no need to take special precautions against damage. Further, since the presser foot 20 and the like can be attached and detached using a force that resists the elasticity of the elastic body, attachment and detachment work is easy.

Note that the magneto-optic crystal 1 may be a rectangular hexahedron, and the optical components 2 and 3 may be other rectangular plate-shaped optical components, such as polarizers, instead of a polarizing prism.

Furthermore, the present invention can be applied not only to optical isolators but also to other optical devices with similar effects.

〔Effect of the invention〕

As explained above, the present invention uses a fixing jig made of non-magnetic metal and fixes the optical component by the elasticity of the elastic body of the fixing jig, thereby preventing bending of the magnetic lines of force and fixing the optical component to the magneto-optic crystal. It has excellent practical effects, such as no adverse effects, no damage to each optical component, and easy attachment and detachment.

[Brief explanation of the drawing]

Fig. 1 is a perspective view showing an embodiment of the present invention, in which the fixing jig is shown in separated form, Fig. 2 is a side cross-sectional view of the fixture inserted into a magnet, and Fig. 3 is a component consisting of a magneto-optic crystal. FIG. 4 is a perspective view showing a conventional fixing jig in separated form. In the figure, 1 is a magneto-optic crystal, 2.3 is an optical component, 5 is a magnet, and 6.16 is a fixing jig body 16. 17 is the bottom plate, 18.19 is the side plate, 18A
, 19A is a notch, 20 is a presser plate, 21 is a horizontal member, 22 is a vertical member, 23.24.25.2
6 indicates an elastic body. Grass/IH Bukkake 2 causes

Claims (2)

[Claims] (1) A rectangular parallelepiped or parallelepiped magneto-optic crystal,
An optical device fixing jig for closely fixing the entrance and exit surfaces of an optical device consisting of one or more plate-shaped or prism-shaped optical components, the optical device being made of non-magnetic metal. a groove-shaped fixing jig body comprising a bottom plate whose surfaces parallel to the optical path are in close contact with each other, and a pair of side plates perpendicular to the bottom plate and provided on both sides of the bottom plate so as not to obstruct the optical path; The holding plate main body is an angle-shaped holding plate made of non-magnetic metal, and is composed of a holding plate in which plate-shaped elastic bodies are fixed to the upper and lower surfaces of a horizontal member and the side surfaces of a vertical member. Device fixing jig. (2) When closely fixing the input and output surfaces of an optical device consisting of a rectangular parallelepiped or parallelepiped magneto-optic crystal and one or more plate-shaped or prism-shaped optical components, A groove consisting of a bottom plate made of magnetic metal whose surfaces parallel to the optical path of the optical device are in close contact with each other, and a pair of side plates perpendicular to the bottom plate and provided on both side edges of the bottom plate so as not to obstruct the optical path. The fixed jig main body and the holding plate body are angle-shaped and made of non-magnetic metal, and are fixed by a holding plate made of plate-shaped elastic bodies fixed to the upper and lower surfaces of the horizontal member and the side surfaces of the vertical member. A jig is configured, the horizontal member is applied to the upper surface of the optical device, the vertical member is pushed between one side of the optical device and one side edge of the optical device, and the respective elastic A method for fixing an optical device, characterized in that the magneto-optic crystal body and the entrance/exit surface of the optical component are fixed in close contact with each other by the elasticity of the body.