A narrow-slit splicing assembly of multi-band optical filters applied at low temperature

Abstract

The invention discloses a narrow-slit spliced assembly of multi-waveband filters applied at a low temperature. The narrow-slit spliced assembly comprises a support plate, an installation limiting plate, the multi-waveband filters and an upper cover plate, wherein a plurality of light through holes are formed on the support plate and the upper cover plate; a plurality of optical filter installation grooves are formed on the installation limiting plate. During installation, a plurality of filters at different wavebands can be put in the installation grooves of the installation limiting plate in one time, thereby realizing precise assembly of the filters by using limiting barrier strips. In such a structure, the support plate, the installation limiting plate and the upper cover plate are all made from low-expansion alloy materials, and need surface blackening treatment before assembly, and a glue used for assembly is a low temperature resistant glue. The assembly has a low requirement on preparation of the multi-waveband filters, is simple in structure, low in optical crosstalk among channels and high in structural reliability, and can realize one-time cementing assembly of the optical filter at each waveband with a small splicing slit of the filters and high assembly precision.

Description

technical field [0001] The present invention relates to a structure of an optical filter assembly, in particular to a narrow slit splicing assembly of a multi-band optical filter applied at low temperature, which is applied to a multi-band optical filter with many channels and difficult monolithic integrated preparation, It is suitable for occasions with high splicing density, low light string rate and high structural reliability. Background technique [0002] The miniaturization and integration of multi-spectral detectors has become one of the development directions of infrared detectors. The direct coupling of multi-channel filters and corresponding band detectors has been adopted due to the advantages of simple optical system design, reliable structure and high detection efficiency. widely used. At present, the multi-channel filter integration methods mainly include the splicing and gluing method and the monolithic integration method. The splicing and gluing method is s...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a structure or method for narrow-slit splicing of multi-band optical filters that can be applied at low temperatures, and solve the problems of traditional splicing and gluing methods that are prone to size interference, large optical strings, complex preparation of monolithic integration, and low yield.

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