JPS61144613A - Fixing method of optical parts - Google Patents

Abstract

PURPOSE:To make extremely easy the fixing of an optical part and optical part attaching member and to prevent the generation of a fault in an optical path by providing inflow holes on the positions of the optical part attaching member corresponding to the center of the fixing face to the optical part, injecting solder in the molten state into the inflow holes and soldering the optical part to the optical part attaching member. CONSTITUTION:The inflow holes 10 are preliminarily provided to the plural positions corresponding to the central part of the fixing face 1b which is a cylindrical surface while a cylindrical lens 1 is held inserted to the prescribed position of the insertion hole 3 of a lens holder 2. After the insertion of the lens 1 to the prescribed position of the hole 3, glass solder 11 in the molten state is injected into the respective holes 10 and is cured to fix the lens 1 to the holder 2 by soldering. If such fixing means is used, the solder in the molten state penetrates into the gap between the inside wall of the hole 3 and the fixing face 1b and increases the fixing area and since the holes 10 exist in the central part of the fixing face 1b, the outflow of the solder to an optical path surface 1a is obviated even if the fixing force increases.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to an improvement in a method for fixing an optical component such as an optical glass element on which a lens, prism, optical film, etc. are formed to a mounting member.

In order to combine optical parts such as optical glass elements with lenses, prisms, optical films, etc. formed thereon with optical fibers, light emitting elements, light receiving elements, etc. as desired, these optical parts must be fixed in predetermined positions on the mounting member. It is necessary to.

In this case, there is a need for a fixing method that is easy to fix and does not obstruct the optical path.

[Conventional technology]

FIG. 3 is a side sectional view of an example of a conventional fixing method, and FIG. 4 is a side sectional view of another example.

In FIG. 3, a cylindrical lens 1 is inserted into an insertion hole 3 of a cylindrical lens holder 2 made of metal, for example stainless steel.

The outer diameter of such a cylindrical lens 1 is set to the insertion hole 3.
The method of machining it to be larger than the inner diameter and press-fitting and fixing it is as follows.
If the press-fitting allowance is too large, the cylindrical lens 1 will be damaged. Furthermore, if the press-fitting allowance is too small, there is a risk that the cylindrical lens 1 will fall off.

Therefore, conventionally, the cylindrical lens 1 was inserted into the insertion hole 3.
After loose insertion into the cylindrical surface, the corner of the periphery of the fixed surface 1b (periphery of the optical path surface 1a) and the inner wall of the insertion hole 3 are soldered and fixed with glass solder 4.

Further, a plate-shaped optical component, such as a prism 5, is fixed as shown in FIG.

In FIG. 4, reference numeral 6 denotes a rectangular block made of metal, for example, stainless steel, on which a fixed surface 5b perpendicular to the optical path surface 5a of the prism 5 is brought into close contact with the upper plane of the block.
The entire surface of the block 6 is soldered and fixed to the block 6 with glass solder 7.

[Problem that the invention seeks to solve]

However, the conventional fixing method described above has a problem in that the glass solder adheres to or protrudes from the optical path surface of the optical component, which obstructs the optical path.

[Means for solving problems]

The above conventional problem is that an inflow hole is provided at a position corresponding to the center of the surface of the optical component mounting member that is fixed to the optical component, and molten solder is injected into the inflow hole to attach the optical component to the optical component. This problem is solved by the method of fixing an optical component according to the present invention, which involves soldering to a component mounting member.

[Effect]

According to the means of the present invention, soldering can be performed by simply injecting molten solder into the inflow hole, and it is extremely easy to fix the optical component and the optical component mounting member. Furthermore, since the inflow hole is provided at the center of the fixing surface, there is no leakage to the optical path surface.

〔Example〕

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

FIG. 1 shows one embodiment of the present invention, (al is a side sectional view, (b
) is a front sectional view, FIG. 2 is a side sectional view, and FIG. 2(b) is a plan view of another embodiment.

In FIG. 1, the cylindrical lens 1 is inserted into a predetermined position of the insertion hole 3 of the lens holder 2, and the cylindrical lens 1 is inserted into a plurality of positions corresponding to the center of the fixing surface 1b, which is a cylindrical surface (diameter direction in the figure). Inlet holes 10' are provided in advance at two locations.

After inserting the cylindrical lens 1 into the predetermined position of the insertion hole 3, molten glass solder 11 is inserted into each inflow hole 10.
The cylindrical lens 1 is fixed to the lens holder 2 by injecting and hardening and soldering.

According to such a fixing means, even if molten solder penetrates into the gap between the inner wall of the insertion hole 3 and the fixing surface 1b, increasing the fixing area and increasing the fixing force, the inflow will be prevented. Since the hole 10 is located at the center of the fixed surface 1b, the light does not flow out to the optical path surface 1a.

In FIG. 2, an inflow hole 13 is previously provided in the block 6 at a position corresponding to the center of the fixed surface 5b with the prism 5 fixed in a predetermined position.

With the prism 5 positioned below the block 6 and the fixing surface 5b in close contact with the plane of the block 6, the inflow hole 1 is
A molten glass solder 14 is injected into 3, hardened, and soldered to fix the prism 5 to the block 6.

According to such a fixing means, even if the molten solder penetrates into the gap between the surface of the block 6 and the fixing surface 5b, increasing the fixing area and increasing the fixing force, the inflow hole 13 is located at the center of the fixed surface 5b, so the optical path surface 5a
It will not leak out.

〔Effect of the invention〕

As explained above, the present invention makes it extremely easy to fix the optical component and the optical component mounting member by simply injecting molten solder into the inflow hole, and also prevents the solder from adhering to the optical path surface of the optical component. This has excellent practical effects, such as being able to secure a desirable optical path for optical components.

[Brief explanation of drawings]

Figure 1 shows one embodiment of the present invention, (al is a side sectional view, (b) is a front sectional view, and Figure 2 is another embodiment, (a) is a side sectional view, (b) is a plane view. 3 are side cross-sectional views of one example of the conventional fixing method, and FIG. 4 is a side cross-sectional view of another example. In the figures, 1 is a cylindrical lens, 1a and 5a are optical path surfaces, 1b, 5b is a fixing surface, 2 is a lens holder, 3 is an insertion hole, 4, 7.11.14 is glass solder, 5 is a prism, 6 is a block, and 10 and 13 are inflow holes, respectively.

Claims (1)

[Claims] An inflow hole is provided at a position corresponding to the center of the surface of the optical component mounting member that is fixed to the optical component, and molten solder is injected into the inflow hole to solder the optical component to the optical component mounting member. A method for fixing optical components, characterized by: