JPH0643559U - Infrared analyzer light source - Google Patents

Abstract

(57) [Summary] [Object] To provide an infrared analyzer light source capable of increasing the light amount of the light source, improving the sealing property inside the light source block, saving the labor of assembling the light source, and shortening the working time. [Structure] Recessed portion 3 formed in metal light source block 2
The filament 4 is provided in the surface 3a of the
In the infrared analyzer light source 1 in which a is sealed with the window material 5, the concave surface 3a and the window material bonding portion 3b are coated with the metal film 8, and the window material 5 is soldered to the bonding portion 3b. Joined.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a light source for an infrared analyzer.

[0002]

[Prior art]

 Conventionally, the light source of an infrared analyzer has been as shown in FIG. In the figure, 31 is a light source of an infrared analyzer, and 32 is a light source block generally made of metal such as aluminum. The light source block 32 is formed with a recess 33 whose one end is open, and a window material adhering portion 33b for mounting a window material 35 described later is provided on the inlet side of the recess 33. The surface 33a of the recess 33 is mirror-finished by buffing to improve its performance as a reflecting surface. A filament 34 is provided substantially in the center of the concave portion 33, and infrared rays diverging from the filament 34 are reflected directly and on the surface 33a and are irradiated onto a cell (not shown). There is.

Further, a disk-shaped infrared transparent window material 35 is adhered to the window material adhesion portion 33b by an epoxy resin adhesive 36. The filament 34 is held at the bottom of the recess 33 by a hermetic seal 37, and an inert gas such as nitrogen gas is sealed in the recess 33 to prevent the filament 34 from deteriorating.

[0004]

[Problems to be solved by the device]

 However, in the above-mentioned conventional structure, the light quantity of the light source block 32 is largely influenced by the polishing finish of the surface 33a of the recess 33. However, this buff polishing requires a great deal of time and labor, and the manufacturing cost of the light source block 32 is low. It has the drawback of being expensive. In addition, it takes time to measure and mix the epoxy resin adhesive 36 for adhering to the window material 35, and it takes time for curing, and further, the adhesive 36 adheres to the light source block 32. Although the internal sealing property is maintained, the adhesive 36 deteriorates with use time and heat and loses its airtightness, and there is a problem that the life of the filament 34 is shortened due to leakage of nitrogen gas inside. there were.

The present invention has been made in view of the above situation, and the amount of light from the light source can be increased, the sealing property inside the light source block is improved, and the labor of assembling the light source can be saved and the working time can be shortened. It is intended to provide a light source for an analyzer.

[0006]

[Means for Solving the Problems]

 In order to solve the above problems, the present invention provides a light source of an infrared analyzer in which a filament is provided in a recess formed in a metal light source block, and the recess is sealed with a window material. Further, the window material adhering portion is coated with a metal film, and the window material is soldered to the adhering portion.

[0007]

[Action]

 In the light source of the infrared analyzer of the present invention described above, since the recess formed in the light source block is coated with a metal film, it is not necessary to perform mirror finishing by buff polishing which is troublesome and time-consuming, and the recess is polished as it is. It is possible to further improve the light reflectance than the above-mentioned surface. Further, by coating with a metal film, the window material can be soldered to a light source block formed of a metal to which solder does not easily adhere, such as aluminum. Since the window materials are joined by soldering, the time and labor for measuring and mixing the chemicals can be saved, and the resin can be cured immediately so that it can be formed in a short time. Furthermore, by soldering, the sealing property inside the light source block is maintained even after long-term use, and the life of the filament can be extended.

[0008]

【Example】

 Embodiments of the present invention will be described below in detail with reference to the drawings. 1 and 2 are views showing an embodiment of the present invention. FIG. 1 shows a state after a window member 5 is joined to a light source block 2 and FIG. 2 shows a state before joining.

In these figures, 1 is a light source of the infrared analyzer of the present invention (hereinafter referred to as a light source). 2 is a light source block, and this light source block 2 is made of a material having a good heat dissipation property such as aluminum. A recess 3 is formed in the light source block 2, and a window material adhering portion 3b for mounting a window material 5 described later is provided on the entrance side of the recess 3.

Then, the surface 3 a of the recess 3 and the window material bonding portion 3 b are coated with the metal film 8. The metal film 8 can be formed by sputtering (evaporating) a metal having a high light reflectance such as gold. Therefore, the concave surface 3a does not need to be mirror-finished by buffing, which is cumbersome and time-consuming. Further, in the present embodiment, gold was vapor-deposited in consideration of light reflectance, but a metal such as nickel may be used instead of gold. Further, various methods such as plating other than the above-mentioned vapor deposition can be used for coating the metal film 8 on the recess surface 3a.

A filament 4 is provided substantially in the center of the recess 3, and infrared rays emitted from the filament 4 are reflected directly and by the metal film 8 on the surface 3 a of the recess, which will be described later with a window member 5. It is designed to pass through and irradiate the cell outside the figure. The filament 4 is held by the hermetic seal 7 at the bottom of the recess 3.

A window material 5 is attached to the window material bonding portion 3b. The window member 5 is made of, for example, glass having excellent infrared ray transparency, and its shape is, for example, a disk shape so as to fit the window member adhesive portion 3b. The window material 5 and the window material adhesive portion 3b are joined by soldering as will be described later. For example, at the joint portion with the window material adhesive portion 3b, that is, on the outer peripheral side of the lower surface of the window material 5, The adhesive portion 5a, which is vapor-deposited with gold, is provided to facilitate the adhesion by soldering.

On the other hand, since the metal film 8 is vapor-deposited also on the window material bonding portion 3b, the light source block 2 formed of a metal such as aluminum can be easily soldered. Therefore, the disk-shaped infrared-transparent window material 5 can be joined to the window material adhesive portion 3b by sandwiching. Then, an inert gas such as nitrogen gas is filled in the concave portion 3 so as to prevent the deterioration of the filament 4.

More detailed description will be given to the attachment of the window member 5. For example, in FIG. 2, for example, solder is applied between the window member adhering portion 3b and the adhering portion 5a in a state where the surrounding area is filled with nitrogen gas. By placing the cream and heating the whole to melt the solder cream, as shown in FIG. 1, the solder 6 melts in a space between the adhesive portion 5a and the window material adhesive portion 3b, and the concave portion 3 and the outside are hermetically sealed. To be shut off. When the heating of the entire light source is stopped and cooled in this state, since the light source block 2 is made of a material having excellent heat dissipation, the solder 6 is immediately cooled and solidified to cause the window material 5 and the light source block 2 to be solidified. It is possible to reliably and promptly bond with.

Further, it goes without saying that the soldering method in this embodiment is only one example, and any method such as using a thread solder instead of the solder cream can be adopted. Furthermore, the enclosed gas is not limited to nitrogen gas, and various inert gases can be used.

[0016]

[Effect of device]

 As explained above, the light source of the infrared analyzer of the present invention has the concave portion formed in the light source block coated with a metal film, so that it is not necessary to perform mirror finishing by buff polishing which is troublesome and time-consuming. The productivity can be improved, and the reflectance of light can be further improved as compared with the surface in which the concave portion of the light source block is ground as it is. Also, by coating with a metal film, the window material can be soldered to the light source block made of a metal to which solder is hard to adhere. Since the window material is soldered to the light source block with high heat dissipation, the solder hardens immediately and the window material installation time can be shortened. Furthermore, by sealing the internal gas with solder, it is possible to eliminate the aging of the gas sealing member, maintain the hermeticity inside the light source block even after long-term use, and extend the life of the filament. It becomes possible.

[Brief description of drawings]

FIG. 1 is a vertical sectional view showing a light source of an infrared analyzer according to an embodiment of the present invention.

FIG. 2 is a vertical cross-sectional view showing a state before the window material of the light source is joined.

FIG. 3 is a vertical sectional view showing a light source of a conventional infrared analyzer.

[Explanation of symbols]

1 ... Light source of infrared analyzer, 2 ... Light source block, 3 ... Recessed portion, 3a ... Recessed surface, 3b ... Window material bonded portion, 4 ... Filament, 5 ... Window material, 6 ... Solder, 8 ... Metal film.

Claims (1)

[Scope of utility model registration request] 1. In a light source of an infrared analyzer in which a filament is provided in a recess formed in a light source block made of metal, and the recess is sealed with a window material, the surface of the recess and the bonding portion of the window material are made of metal. While coating with a film,
A light source for an infrared analyzer, wherein a window material is soldered to the adhesive portion.