JPS61102624A - Adjusting and fixing method of prism component - Google Patents

Abstract

PURPOSE:To easily adjust position relation by adjusting parallelism while a parallel prism interposed between abutting surfaces of facing glass plates are pressed by a leaf spring, and adhering the bottom end surface of the prism components to a substrate. CONSTITUTION:The parallel prism 15 while clamped between abutting surfaces of glass plates 3 of prism components 1 and 2 is inserted into the groove 22 of a jig 20 and pressed with the elastic force of the leaf spring 23. In this state, an adjustment is so made that reflected light 25B when incident light 25 is projected on and reflected by the prism surface 4 of the component 25 and incident on the prism surface 4 of the component 1 is parallel to the light 25. Then an adhesive 11 is applied to the bottom end surface which faces up while the components 1 and 2 are held on the jig 20 and the substrate is placed thereupon and fixed by curing the adhesive 11. Consequently, the position relation between the two prism components is easily adjusted in a short time.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an improvement in a method for adjusting and fixing prism parts of an optical device comprising a pair of prism parts.

Many optical devices use prism parts with an antinodal number, and the relative positional accuracy of these parts and parts greatly influences the degree of optical coupling between the optical fiber and the chair.

FIG. 2 (al is a perspective view of a prism J and parts, and bl is a construction diagram of an optical device using a pair of prisms L and parts).

In FIG. 2 (al), prism parts are inserted and fixed between a first prism PI and a second prism P2, each of which is a right-angled prism, and a first prism Ill and a second prism P2. It is more refined than the rectangular shape 1 and the curved glass plate 3).

The hypotenuse surface of the first prism 111 and the second prism P2
The glass plate 3 is inserted between the opposing surfaces and protrudes long toward one end surface of the prism, and is bonded with an optical adhesive to form the first prism PI. , Glass Hill 3. A second prism P2 is integrated.

This is an example of an optical device in which the prism parts shown in FIG. 2 (bl and la) are combined, and is, for example, an optical switch.

Each of the first prism component l and the second prism component 2 have the same shape, and a polarization separation film is formed on approximately half of the surface of the second prism P2 that is in close contact with the glass plate 3. be.

The first prism part 1 and the second prism part 2 have their respective second prisms P2 on the inside and are made of glass (reverse 3
The prisms P2 and the prisms P2 are arranged in parallel so that the selected prism surfaces 4 are parallel to each other. Note that a Faraday rotator and a half-wave plate (not shown) are installed between the first prism component 1 and the second prism component 2.

The optical device configured in this way has incident light IN+ on the first prism 1% Pl of the first prism component 1, and
By reversing the direction of the magnetic field of the Faraday rotator, the output light OUT from the second prism P2 of the second prism component 2 is
The output light from the first prism P1 can be switched to 0UT2 as desired.

In such an optical device, the glass plate 3 of the first prism part 1 and the second bristle part 1, the glass plate 3 of the part 2
If the comrades and prism surfaces 4 and 4 are not installed parallel to each other, the polarized light segments 31 and 32 of the incident lights IN+ and INz separated by the polarization separation film of the first prism component
However, the lights are no longer combined into one optical path by the second prism l and the polarization separation (synthesis) film of the component.

Therefore, it becomes difficult to determine the mounting position of each optical transmission line (for example, an optical fiber), and the degree of optical coupling decreases.

At this time, there is a need for an adjustment and fixing method that allows easy adjustment of the relative positions of the prism parts.

[Conventional technology]

FIG. 3 is a perspective view showing a conventional method for adjusting and fixing prism parts.
1 is covered with O cloth and fixed at a desired position on the substrate IO.

The second prism component 2 placed on the substrate 10 facing the first prism component I is held by the arm 13 of the turbulent table 12 at the upper part of the protrusion of the glass plate 3 .

This fine movement table 12 has an X axis parallel to the W temporary IO mounting surface,
It is configured to be able to be finely adjusted in the Y axis, the Y axis perpendicular to the substrate 10, and the rotational directions of the horizontal i and vertical axes.

In this way, the first prism component 1 and the second prism component 2 are mounted on the substrate 10, for example, H, -N.

The incident light 16^ of the laser beam is applied to the glass plate 3 of the first prism component l, and the incident light 17^ parallel to the incident light 16^ is applied to the second prism component l.
is projected onto the glass plate 3 of the prism component 2.

Then, the parallelism of each reflected light 16B and reflected light 17B is measured, and by operating the fine movement table 12, the second prism component 2 is adjusted to the desired parallelism.

Next, hold the parallel plate 5 with the other arm of the iiJ moving table,
The first prism 1 is inserted between the component 1 and the second prism component 2, and the parallel plate 5 and the prism surface 4 of the first prism component 1 are connected to each other during operation 1 of the following table. Make the steps more parallel.

Then, the incident light 16C is projected onto the prism component 4 of the first prism component, and the incident light 17c is projected onto the bristle top surface 4 of the second prism component, and the reflected light 1(
In, the incident light 17c is reflected by the prism surface 4, is reflected by the parallel plate 5, and the reflected light 170 reflected by the parallel plate 5 is adjusted to have the desired parallelism.

When these adjustments are completed, operate the fine movement table 12 to
While holding the second prism part 2 with the arm I3,
Lift vertically upwards, apply adhesive 11 Q to the position of the substrate 10 where the second prism component 2 is placed, lower the second prism component 2, and place the end face of the second prism component 2 on the substrate. Glue to 10.

[Problem that the invention seeks to solve]

However, in the conventional adjustment and fixing method described above, 1q; 6, when the second prism component is first placed on the board, is an eye examination with respect to the first prism component, so the X-axis of the fine movement table,
It is necessary to repeat the adjustment in the rotational direction of the Y-axis, horizontal axis, and vertical axis, and then repeat the adjustment of i=v, 1, and 1, which takes a lot of time. ) The problem is that the second prism component must be held in one place on the sliding table until the adhesive hardens, resulting in poor operating efficiency and high costs for the expensive fine movement table. There is a problem.

[Means for solving problems]

The problem with the above conventional method is that a parallel prism is inserted between the protruding surfaces of opposing glass plates, the parallel prism is held by pressing a pair of temporary springs from the outside of each of the glass plates, and the end surface of the parallel prism is and the opposing faces of the selected prism of the first prismatic part and the corresponding prism of the second prismatic part using parallel beam means. Adjust the parallelism of the surface and...
I! Ii (vertical position 4 kg 1 kg), the bottom end surfaces of each of the first prism part and the second prism part,
This problem is solved by the method of adjusting tit1 of the present invention, which is bonded to the substrate with an adhesive.

[Effect]

1--As the 19-layer structure of the present invention is made of glass, it is easy to manufacture the end surface with high accuracy.

Therefore, by inserting a parallel prism between glass plates and pressing each glass plate from the outside with a pair of leaf springs, the glass plates of the first prism part and the second prism part are automatically held in parallel. Ru. Therefore, in this state, the first prism component and the second prism component are simply rotated manually in the horizontal axis direction using the parallel beam means so that the respective selected prism surfaces become parallel. The relative position of the prism parts can be adjusted.

In addition, while the adjustment position is held by the elasticity of the temporary spring,
The bottom end surfaces of the first prism component and the second prism component can be bonded to the substrate with an adhesive, and there is no need to use an expensive fine movement table or the like.

- [Example] The gist of the present invention will be specifically explained below with reference to illustrated examples. In addition, the same reference numerals throughout the figures indicate the same objects.
゛.

FIG. 1 is a perspective view of one embodiment of the present invention.

In the figure, reference numeral 15 denotes a parallel prism made of a glass material, and the angle of inclination of the end with respect to the longitudinal side surface is such that it is inserted between the glass plates 3 of the first prism part 1 and the second prism part 2. At this time, the opposing surfaces of the second prism P2 sandwiching the right angle are formed at an angle perpendicular to the longitudinal side surface of the parallel prism 15.

Further, a pair of leaf springs 23 that press each glass plate 3 from the outside in a state where the parallel prism 15 is inserted between the glass plates 3 are attached to opposing end surfaces of the jig 20.

The jig 20 has a length of parallel bridge l, 15 and glass Fi3.
IP#22, which has a width slightly wider than the width of the glass plate 3, is provided at the center of a descending hexahedral plate-shaped base 2I, whose length is slightly smaller than twice the sum of .

A plate spring 23 is attached to each opposing end 1u1 of the w stand 21 so as to close the end of the groove 22.

Parallel prism part 15 is a first prism part l and a first prism part l.
The prism part 2 is inserted into the groove 22 of the jig 20 while being sandwiched between the protruding surfaces of the glass plate 3 of the prism part 2 '2.

As a result, the respective glass walls 3v5i (sides) are pressed by the elasticity of the respective leaf springs 23, and the inner surfaces come into elastic contact with both end surfaces of the parallel prism I5.

Therefore, the first prism part I and the second prism part 2
The respective glass plates 3 are parallel to each other.

In this state, for example, the incident light 25 of the l1e-Ne laser beam is projected onto the prism surface 4 of the second prism component 2, and the second
The reflected light 251S is reflected by the prism surface 4 of the prism component 2, and is incident on the prism surface 4 of the first prism component, and the reflected light 251S and the extension light 25^ of the incident light 25 when the second prism component 2 is not present. , manually move one of the prism parts, for example, the second bristle J, so that they are parallel to each other.
, the part 2 is slightly rotated in the horizontal axis force direction.

At this time, the glass plate 3 and the parallel prism 15 are connected to the temporary spring 2.
3, the adjusted state is maintained even if the IM is slightly rotated and the hand is moved. Therefore, it is easy to make the emitted light 7 and the emitted light 8 parallel.

After adjustment, attach the first Briz J to the fixture 20, and the parts 1. While holding the second prism component 2, apply the adhesive 11 to the upwardly facing bottom end surface, and apply the base #I on the bottom end surface.
i and io are placed on the substrate 10, and the adhesive 11 is cured to fix the first prism component l and the second prism component 2 to the substrate 10, respectively.

Note that the jig 20 has an MHL structure and is inexpensive, and by providing several parallel grooves in the jig 20, a plurality of optical devices can be adjusted and fixed in a short time.

(Effects of the Invention) As explained above, the present invention has excellent practical effects, such as easy and quick adjustment of the relative positions of two prism parts, low equipment cost, and low cost. There is.

[Brief explanation of the drawing]

Figure 1 shows the present invention 0) New Year's Eve example i3J 171. . Figure 2 (al is a perspective view of the prism parts, (bl is the configuration diagram of a 1° optical dehazer using a pair of prism parts, Figure 3 is a diagram of the conventional Zorisno and component adjustment methods. In the figure, 1 is a first prism component, 2 is a second prism component, 3 is a glass plate, 11 is an adhesive, 15 is a parallel prism l1, 20 is a jig, and 21 is a base. ,
22 is the spring j, %, 23 is the temporary spring, Pl
1 and 2 indicate a first prism 1 and 2 a second prism l, respectively. Potato 1 Figure 2 @ (dL) (b) 3rd prisoner

Claims (1)

[Claims] A first prism component 1 in which one surface of a first prism and one surface of a second prism are bonded together via a rectangular plate-shaped glass plate that protrudes longer than the contact surface, and the first prism component and a second prism component having the same shape as the glass plate, the parallel prism is inserted between the protruding surfaces of the opposing glass plates, and The parallel prism is held by pressing from the outside of each plate with a pair of leaf springs, and by sliding between the end face of the parallel prism and the contact surface of the glass plate, the first Adjust the parallelism between the selected surface of the selected prism of the prism component and the opposing surface of the prism corresponding to the second prism component, and hold the adjusted position by the elasticity of the leaf spring. The bottom end surfaces of each of the first prism component and the second prism component are
A method for adjusting and fixing prism parts, characterized by adhering them to a substrate with an adhesive.