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Visible near-infrared spectrum band reflection and infrared multispectral band transmission color separation filter and preparation method

A color separation film and multi-spectral technology, applied in the 1.75 field, can solve the problem of color separation film improvement

Inactive Publication Date: 2013-08-14
LANZHOU INST OF PHYSICS CHINESE ACADEMY OF SPACE TECH
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Problems solved by technology

[0003] Since it is more difficult to prepare a color separation film that meets the focal plane technology than the traditional color separation film, higher requirements are placed on the material and film system of the light separation film, which has not yet been found in the 0.43-0.90 μm spectral band It is a color separation film with high reflectivity and high transmittance in the spectral bands of 1.55~1.75μm, 2.08~2.35μm, 3.50~5.50μm, 7.80~10.00μm and 11.08~12.55μm

Method used

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  • Visible near-infrared spectrum band reflection and infrared multispectral band transmission color separation filter and preparation method

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Embodiment 1

[0027] A visible near-infrared band reflection and infrared multi-spectrum transmission color separation film, the color separation film includes a zinc selenide substrate and a film system on one side of the substrate;

[0028] The film system includes alternately stacked zinc sulfide film layers and yttrium fluoride film layers. The wavelength is 890nm; among them, h is the zinc sulfide film, 0.3, 0.38 and 0.5 are the coefficients of the thickness of the zinc sulfide film corresponding to the basic thickness, 0.3h represents the thickness of the zinc sulfide film is 0.3 basic thickness, and 0.38h represents the zinc sulfide film The layer thickness is 0.38 basic thickness, 0.5h represents the thickness of the zinc sulfide film layer is 0.5 basic thickness, l is the yttrium fluoride film layer, 0.6, 0.76 and 1 represent the coefficient of the yttrium fluoride film layer thickness corresponding to the basic thickness, 0.6l The thickness of the yttrium fluoride film layer is 0....

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Abstract

The invention relates to a visible near-infrared spectrum band reflection and infrared multispectral band transmission color separation filter and a preparation method, and belongs to the field of surface technology. The color separation filter comprises a zinc selenide base and a film system on one side of the base; the structure of the film system is (0.3h 0.6l0.3 h) ^ 10 (0.38h 0.76 l0.38 h) ^ 10 (0.5 h l0.5 h) ^ 12, and the central wavelength is 890 nm, wherein h and l refer to zinc sulfide and yttrium fluoride film respectively; and the color separation filter is prepared through the following steps: heating the base in vacuum, using ion beam to bombard the base, using ion beam to assist electronic gun evaporation to deposit the film system on two sides of the base, and cooling. The reflectivity of the color separation filter is high at 0.43-0.90 micron; the transmittance of the color separation filter is high at 1.55-1.75 microns, 2.08-2.35 microns, 3.5-5.5 microns, 7.8-10 microns, and 11.08-12.55 microns; and the color separation filter meets beam split operating requirement of a remote sensing detection system.

Description

technical field [0001] The invention relates to a visible near-infrared spectrum reflection and infrared multi-spectrum transmission color separation sheet and a preparation method thereof. Specifically, the color separation sheet has a high reflectivity in the 0.43-0.90 μm spectrum section, and a high reflectivity in the 1.55-1.75 μm spectrum section. , 2.08-2.35 μm, 3.50-5.50 μm, 7.80-10.00 μm and 11.08-12.55 μm spectral bands all have high transmittance; it belongs to the field of surface technology. Background technique [0002] The color separation film is a key component in the detection system of space cameras and other imaging instruments at present, and it performs spectroscopic effect on the light entering the detection system of space cameras and other imaging instruments. Focal plane technology represents the development direction of the current imaging system. It mainly uses integrated detector array technology to concentrate multiple spectral band filters on on...

Claims

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Application Information

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IPC IPC(8): G02B1/10G02B5/20
Inventor 王多书王济洲熊玉卿董茂进王超张玲李晨
Owner LANZHOU INST OF PHYSICS CHINESE ACADEMY OF SPACE TECH
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