JPH03215333A - Glass rod-fixed optical part - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an optical component in which a glass rod of an optical component and a metal are bonded and fixed.

[Conventional technology]

There is a metal flow method as a method of combining two metals into 10. This method, as disclosed in Japanese Patent Publication No. 55-48895, involves inserting another metal between two opposing metals and deforming the metals under pressure to join them. This method is shown in Figure 5. The inner circumferential surface of the first member to be bonded 81 and the outer circumferential surface of the second member to be bonded 80 opposing the first member with a gap therebetween are used as a bonding portion, and the bonding material 2 is inserted into this gap. In this state, the bonding material 2 is deformed under pressure using the mold 6. The plastically deformed bonding material 2 flows into the concave and convex portions 10 provided on the bonding surfaces of both members to be bonded. As a result, the bonding material 2 is filled between the two members to be bonded, and the two members are bonded. [Problems to be Solved by the Invention] In the conventional structure described above, the members to be joined are metal, and in order to be suitable for a device that transmits a large rotational torque, the joining material is fixed by plastically deforming with a large pressing force. but,
When fixing the parts to be joined with glass, which is a fragile material,
If the bonding material is plastically deformed with a large pressure, the glass may break. Furthermore, if the pressing force is too small, the amount of plastic deformation of the joining material will be small, and the space between the parts to be joined will not be filled, so the glass will not be fixed and will come off. Furthermore, the bonding surfaces of the members to be bonded are provided with unevenness to allow the bonding material to flow in and strengthen the bonding force by shearing force.However, providing unevenness or grooves on the glass surface is difficult to process, and is costly and reduces productivity. The problem was that it was bad. An object of the present invention is to provide a glass iron fixing optical component that can easily and reliably fix glass and a holder stably over a long period of time. [Means for solving the problem] The above purpose is to insert a glass rod whose outer peripheral surface is coated with a surface-treated member and a ring-shaped bonding material into predetermined positions of a holder, and process the bonding material from above with a mold. This is achieved by pressure deforming, followed by heat treatment to cause mutual diffusion between the surface treated member and the bonding material, thereby bonding and fixing the surface treated member and the bonding material.

[Effect]

Insert the glass rod whose outer circumferential surface has been surface-treated and the ring-shaped joining member into the specified position of the holder. Next, after deforming the bonding material under pressure from above, heat treatment is performed to cause mutual diffusion between the surface-treated member and the bonding material. As a result, the plastically deformed bonding material adheres to the outer peripheral surface of the glass rond,
It is also in close contact with the inner peripheral surface of the holder. Furthermore, since mutual diffusion is performed by applying heat, the glass rod and holder are integrated with each other via the bonding material. Therefore, the glass iron and metal can be fixed reliably and stably.

〔Example〕

An embodiment of the present invention will be explained below with reference to FIG. FIG. 1 shows a case where a glass rod having an outer diameter of 2.0 mm and a length of 2.11 mm is fixed to a holder. In the figure, the holder 3 has an outer diameter of 5.0 mm and a height of 5.8 mm, and is made of Kovar or Fe-42Ni alloy, which has a coefficient of thermal expansion close to that of glass. 8m through hole and 2.0
5+a+e, 2.6st holes each have a depth of 2. 6
wa, 2. It is provided with a dimension of 0 m.

The bonding material 2 is held at the step 11 between 2.05 m and 2.61 m, and the glass rod 1 is held at the step 12 between 1.8 m and 2.05 cm. The outer peripheral surface of the glass rod 1 is coated with a surface treatment member 4 with a thickness of 10 μm, and the types of surface treatment member 4 include gold plating, copper plating,
Solder plating is used. The bonding material 2 has an inner diameter of 2.05 m, an outer diameter of 2.5 m, and a height of 1.2 m, and is easily plastically deformed, and is also made of a material that easily interdiffuses with the surface treatment member 4, such as Au-Sn, Sn, etc. -Pb. Brass, copper, etc. are suitable.

Next, in the assembly process, the glass rod 1 is first inserted into the hole 2.05 in the holder, and the bonding material 2 is inserted into the gap between the glass rod 1 and the inner surface 13 of the holder hole. In this state, the entire glass rod is restrained from moving from side to side, with the lower part of the glass rod supported by the 2.05 inch hole and the upper part supported by the bonding material 2. In this state,
As shown in FIG. 3, the bonding material 2 is deformed by pressure in the pressurizing part of the mold 6, which has a tip end surface that is approximately the same thickness as the bonding material 2, or less than that. The plastically deformed bonding material 2 adheres to the inner circumferential surface 13 of the hole and the outer circumferential surface of the glass rod to the extent that it does not damage the glass rod 1, and presses the glass rod 1 uniformly from the surrounding area. The pressing force at that time is 10 to 12 kg/m
"The amount of deformation and sinking of the bonding material 2 is 100 μm to 200 μm.Next, heat treatment is performed to form an interdiffusion layer in the adhesive layer between the surface-treated member 4 on the outer peripheral surface of the glass rod and the plastically deformed bonding material 2." 5. As a result, the glass rod 1 and the holder 3 are integrated via the bonding material 2, and the two are bonded and fixed.The temperature of the heat treatment at this time varies depending on the type of the surface-treated member 4 and the bonding material 2, but the gold plating On the other hand, when the coupling member is Au-Sn, 15
0°C to 180°C, 130°C to 150°C for Sn-Pb
℃、300℃～50℃ for copper ring for copper plating
It is suitable to treat at a temperature of 0° C. for 2 to 3 hours.

In the present invention, the glass rod 1 inserted into the holder 3 is temporarily fixed by pressurizing and deforming the bonding material 2 with an appropriate force, and the surface-treated member 4 and the bonding material 2 on the outside of the glass rod are bonded at an appropriate temperature and time. This ensures reliable bonding and fixing strength by interdiffusion between the two. Therefore, the glass rod 1 fixed to the holder 3 can be fixed without destroying the glass. Further, the upper and lower parts of the glass rod 1 are supported from the periphery by the stepped portion 11 and the bonding material 2, and are pressed down with uniform force, so that the glass rod 1 does not tilt. Also, step part 1
1, the plastically deformed coupling member 2 does not wrap around the bottom of the glass rod 1, which has the effect of preventing the glass rod 1 from floating up.

As another embodiment, a glass rod 1 fixed with a low melting point glass 7 is shown in FIG. In FIG. 4, the glass rod 1 and the low melting point glass 7 are inserted into a predetermined position in the holder 3, and the low melting point glass 7 is pressurized by a mold 6 with a force of 5 to 8 kg/cd. While applying pressure, heat is applied to melt and fix the low melting point glass 7. According to this method, the low melting point glass 7 is compatible with the glass rod 1, so there is no need for surface treatment.Also, although the low melting point glass 7 releases gas when reacting, it melts under pressure. No gas remains inside, creating a tight bond.

According to this embodiment, the glass rod has the effect of being able to obtain a tight bonding state with relatively small pressure and heating. Furthermore, the present invention can be effectively utilized when a cylindrical cap lens used for optical coupling is fixed. If the cylindrical rod lens is not fixed horizontally or vertically and stably for a long period of time, the optical axis will shift and the light will not be able to be focused on the target position, resulting in a decrease in coupling efficiency. All of these problems can be solved using the same construction as the above method. [Effects of the Invention] According to the present invention, the glass rod is inserted into the holder and deformed with a small force that does not damage the bonding material glass rod, and then heat is applied to cause mutual diffusion.

For this reason, the glass rod is held down with a uniform force due to the period, and since they are mutually diffused, the glass rod can be securely and stably fixed to the holder without breaking or coming off. Furthermore, the glass rod is supported from its periphery by the stepped portion of the guide and the bonding material, thereby preventing it from tilting or lifting. When a rod lens is fixed, this structure allows the lens to be fixed horizontally and vertically, and is effective in preventing the lens from shifting and keeping the optical axis constant at all times.

Therefore, the glass rod fixing optical component of the present invention can easily and reliably fix a glass rod, and has the effect of being stable over a long period of time.

[Brief explanation of drawings]

Fig. 1 is a sectional view of a glass rod fixed optical component showing an embodiment of the present invention, Fig. 2 is a perspective view of a glass rod and a bonding material bonded together, and Fig. 3 is a pressurized deformation of the bonding material. FIG. 4 is a sectional view showing another embodiment of the present invention, and FIG. 5 is a perspective view of a conventional structure. DESCRIPTION OF SYMBOLS 1...Glass rod, 2...Joining material, 3...Holder, 4...Surface treatment member, 5...Interdiffusion part, 6
...Mold, 7...Low melting point glass, 9...Pedestal, 1
0... Uneven part, 11.12... Step, 13... Hole inner peripheral surface, 8o... Second! l Country 12 Figure 2 Figure 3 (L) Figure Q Figure 4

Claims (1)

[Claims] 1. In an optical component including a glass rod and a holder,
After applying a surface treatment to the outer peripheral surface of the glass rod and storing the glass rod in a predetermined position in the holder, a ring-shaped bonding material is inserted between the glass rod and the holder, and the bonding material is deformed by pressure. A glass rod fixing optical component, characterized in that the glass rod and the holder are bonded and fixed by heat treatment after the glass rod is heated.