CN2054539U

CN2054539U - Light absorber

Info

Publication number: CN2054539U
Application number: CN 89201365
Authority: CN
Inventors: 李纯仁; 陶守墨; 江荣熙; 魏庆农; 王亚萍
Original assignee: Anhui Institute of Optics and Fine Mechanics of CAS
Current assignee: Anhui Institute of Optics and Fine Mechanics of CAS
Priority date: 1989-01-31
Filing date: 1989-01-31
Publication date: 1990-03-14

Abstract

The utility model relates to a light absorber which belongs to the field of optical elements. The present light absorber has the disadvantages of difficult processing, low light absorbing efficiency and short service life. The utility model is characterized in that a curved trumpet-shaped inner cavity wall is coated with black paint. The utility model can be widely used for absorbing parasitic light in an optical system.

Description

Light absorber

The utility model is a kind of light absorber, and it belongs to the optical element field, and it is to be covered with light absorbent on the horn-like internal chamber wall of bending.

Existing light absorber mainly applies cigarette ash by the method with sootiness on the internal chamber wall that is made into ox horn or snail shape, or the upward black Velveting that sticks with glue reaches the purpose of eliminating veiling glare in the optical system.As what use in the laboratory is exactly this form.But the complex process of sootiness inner chamber, the adhesion of cigarette ash is little, moisture-sensitive, is shaken and comes off, and black Velveting subjects to damage by worms, go mouldy, and causes the absorption efficiency of light absorber to reduce greatly; And these light absorbers are only limited to visible light to the absorption bands of light, and can not be used for infrared band.

The purpose of this utility model is to avoid above-mentioned weak point of the prior art and provides a kind of sturdy and durable, to the absorption efficiency height of light, is applicable to the light absorber of spectral range at 0.4 to 8 micron waveband.

The purpose of this utility model can reach by following measure: the coating blackwash sponges the optical radiation that enters horn-like inner chamber on the horn-like internal chamber wall of bending.

The purpose of this utility model can also reach by following measure: blackwash can adopt BMD pitch-dark (Chinese Academy of Sciences's Shanghai organic chemistry is produced) or MSR6 pitch-dark (Chinese Academy of Sciences's Shanghai organic chemistry is produced) or K-027 pitch-dark (HeFei University of Technology's production) or 3M pitch-dark (by Britain's import) or the unglazed blackboard paint of nitro.Also can the first sandblast (80 to 120 purpose sand) of the horn-like internal chamber wall of bending be carried out black oxidation then and handle, then apply blackwash again.In blackwash, also can add silicon nitride, or with silicon nitride as substrate, apply blackwash thereon again and make the absorption region of light absorber further be widened to 14 microns.The applied thickness of blackwash only needs to get final product more than or equal to 60 microns.

The utility model has following advantage compared to existing technology:

1, the strong adhesion of blackwash is not afraid of humidity, vibration, to the environment for use no requirement (NR);

2, using wavelength band wide, is that 0.4 to 8 micron optical radiation all can absorb effectively to wavelength, and absorptivity is up to more than 99%;

3, be easy to the suitability for industrialized production of product.

Describe concrete structure of the present utility model and working condition in detail below in conjunction with accompanying drawing.

Fig. 1 is the internal chamber wall and the pitch-dark a kind of basic structure synoptic diagram as blackwash of use BMD that the utility model uses cattle horn shape.

Fig. 2 is the internal chamber wall and the pitch-dark a kind of basic structure synoptic diagram as blackwash of use MSR6 that the utility model uses snail shape.

Fig. 3 is that the utility model uses interplanar in twos angle the plane reflection type internal chamber wall and the pitch-dark a kind of basic structure synoptic diagram as blackwash of use K-027 of 135 degree each other.

With reference to Fig. 1, the internal chamber wall of light absorber is cattle horn shape, has applied the pitch-dark 12(of BMD or the 3M pitch-dark 42 of 80 micron thickness on internal chamber wall).

With reference to Fig. 2, the internal chamber wall of light absorber is snail shape, is coated with the pitch-dark 22(of MSR6 or the unglazed blackboard paint 52 of nitro of 60 micron thickness on internal chamber wall).

With reference to Fig. 3, the internal chamber wall of light absorber is made of on the inclined-plane of 135 degree each other the interplanar in twos angle of polylith, and the K-027 that has applied 90 micron thickness on internal chamber wall is pitch-dark.

Enter the inner chamber body of light absorber when light 1 after, because the geometric configuration of inner chamber body makes light 1 to reflect to the depths of inner chamber body, and the blackwash (12,22,32,42,52) that is applied on the internal chamber wall in repeatedly reflecting sponges fully.

Claims

1, a kind of light absorber is covered with light absorbent on the horn-like internal chamber wall of bending, feature of the present utility model is that light absorbent is blackwash (12,22,32,42,52).

2, absorber according to claim 1 is characterized in that blackwash is BMD pitch-dark 12 or MSR6 pitch-dark 22 or K-027 pitch-dark 32 or 3M pitch-dark 42 or the unglazed blackboard paint 52 of nitro.

3, absorber according to claim 1 and 2, the thickness that it is characterized in that blackwash (12,22,32,42,52) is more than or equal to 60 microns.