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Far infrared wave band optical film optical filter with CVD diamond being a substrate

An optical film and filter technology, applied in the direction of filters, optics, optical components, etc., can solve the problems of inability to spectral response, difficulty in research and analysis of long-wave channels, and achieve the effect of stable performance

Active Publication Date: 2017-06-13
SHANGHAI INST OF TECHNICAL PHYSICS - CHINESE ACAD OF SCI
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Problems solved by technology

However, there is no special research on the detection of the 25-45μm band interval, and it is only involved in the detection of the whole band.
This brings great difficulties to the study and analysis of long-wave channels.
[0005] In the research direction of the far-infrared window direction, some domestic organic substances such as polyethylene and plastics are used as window materials for infrared detectors in the 15-45μm band. These materials have the ability to withstand mechanical shocks, but they cannot respond to the spectrum before 15μm. And the application of plastic polymer components in aerospace also has its shortcomings

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  • Far infrared wave band optical film optical filter with CVD diamond being a substrate
  • Far infrared wave band optical film optical filter with CVD diamond being a substrate

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Embodiment Construction

[0018] The specific embodiment of the present invention will be described in further detail below in conjunction with the accompanying drawings.

[0019] The invention is a far-infrared band optical thin film filter based on CVD diamond, the band pass range is 5-45 μm, the cut-off zone is 0-5 μm, and PbTe and ZnSe are selected as high and low refractive index materials.

[0020] The band-pass film system on the front side and the cut-off film system on the back side of the far-infrared band optical thin film filter based on CVD diamond in the present invention adopt a multi-layer irregular film system structure. The deposition of the film system adopts the complementary monitoring method of quartz crystal monitoring and direct optical monitoring to control the deposition error of the film thickness and obtain a result close to the design.

[0021] The front bandpass film system 1 selects the central wavelength λ 0 5μm, optimized by film design software, the film structure is:...

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Abstract

The invention discloses a far infrared wave band optical film optical filter with CVD diamond being a substrate. With lead telluride (PbTe) and zinc selenide (ZnSe) being a high-low refraction index film material, multiple layers of membranes are deposited on the two sides of the CVD diamond substrate by the adoption of a thermal evaporation deposition method in the vacuum environment of 1-2*103Pa and at the deposition temperature of 200+ / -2 DEG C; with the far infrared optical filter, wave bands with wave length smaller than 5 micrometers can be intercepted, the average transmittance is lower than 1%, and the average transmittance of wave bands of 5-45 micrometers is larger than 71%. The far infrared wave band optical film optical filter can be applied to the fields of far infrared target recognition in earth radiation detection and deep space detection and other fields.

Description

technical field [0001] The present invention relates to far-infrared band optical thin film technology, and specifically refers to a far-infrared band optical thin film filter based on CVD diamond. By coating multi-layer films on CVD diamond, the transmission of far-infrared band and wavelength less than 5 Cutoff for the micron band. [0002] technical background [0003] The Earth's radiation budget refers to the radiation exchange process in which the Earth's atmospheric system receives ultraviolet, visible, and near-infrared electromagnetic radiation from the sun and the Earth's atmospheric system emits infrared radiation to outer space. The detection of the Earth's radiation budget (ERB) is based on space remote sensing An organic component, as an important climate variable in the global climate observing system, the Earth's radiation budget measurements can be used to validate climate model outputs, determine cloud parameterization schemes in numerical prediction models,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B5/20
CPCG02B5/208
Inventor 罗海瀚刘定权孔园园蔡清元
Owner SHANGHAI INST OF TECHNICAL PHYSICS - CHINESE ACAD OF SCI
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