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A color separation element and design method for visible light, laser and mid-infrared bands

A technology of infrared band and design method, applied in optical components, optics, instruments, etc., can solve the problems of slow spectral transition, insufficient use of spectral resources in the transition region, and difficulty in preparation.

Active Publication Date: 2019-08-16
TIANJIN JINHANG INST OF TECH PHYSICS
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Problems solved by technology

This kind of spectroscopic method is mainly suitable for splitting the spectral band, but its disadvantage is that the spectral transition is relatively slow, the spectral resources in the transition area cannot be fully utilized, and when the spectrum in the transmission area is wide, the metal film layer is thin, which is not easy to prepare

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  • A color separation element and design method for visible light, laser and mid-infrared bands
  • A color separation element and design method for visible light, laser and mid-infrared bands
  • A color separation element and design method for visible light, laser and mid-infrared bands

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Embodiment Construction

[0060] In order to make the purpose, content and advantages of the present invention clearer, the specific implementation manners of the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.

[0061] This embodiment proposes a visible light, laser and mid-infrared band color separation element, its structure is as follows figure 1 shown. The color separation element includes two parallel flat optical elements with a working angle of 45°, wherein the first surface of the first flat optical element is opposite to the first surface of the second flat optical element. The mid-infrared band is separated by transmission, the visible light band is separated by secondary reflection, and the laser band is separated by reflection and transmission.

[0062] The structure of the first flat optical element is as figure 2 shown. As the first flat optical element of the dichroic optical element, a silicon substrate is u...

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Abstract

The invention belongs to the technical field of optical thin films and particularly relates to a color separation component through transmission of a visible light band (0.6-0.9 [mu]m), a laser band (1.06 [mu]m) and a middle infrared band (3.0-5.0 [mu]m) and a design method. In the color separation component, two parallel plate optical components with the working angle of 45 degrees are adopted, and colors are separated according to an infrared band transmission method, a visible light band reflection method and a laser transmission method sequentially through reasonable selection of optical thin films on the two sides of each of the plate optical components; the average light splitting coefficient of the middle infrared band is 96% or higher, the average light splitting coefficient of the visible light band is 98% or higher, and the average light splitting coefficient of the laser band (1.06 [mu]m) is 98% or higher.

Description

technical field [0001] The invention belongs to the technical field of optical thin films, in particular to the three-band spectroscopic thin-film technology, in particular to a reflection in the visible light band (0.6-0.9 μm) and a laser band (1.06 μm), and a transmission in the mid-infrared band (3.0-5.0 μm). Color separation components and design methods. Background technique [0002] The modern photoelectric tracking and aiming pod has the functions of capturing, tracking and aiming. system components. The photoelectric pod integrates infrared imaging, TV tracking and laser ranging functions, and its optical system basically adopts a common-aperture light combination and light splitting system. At present, foreign advanced pods all adopt the scheme of "three lights" such as TV, laser and infrared sharing the front-end optical system, and then carry out information processing on each optical path separately. Therefore, the spectroscopic element is one of the core comp...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02B27/10G02B1/115G02B27/00
CPCG02B1/115G02B27/0012G02B27/1006
Inventor 刘华松姜玉刚李士达杨霄冷健孙鹏季一勤
Owner TIANJIN JINHANG INST OF TECH PHYSICS