Middle and far infrared and laser compatible stealth film and design scheme thereof

Abstract

The invention provides a middle and far infrared and laser compatible stealth film and a design scheme thereof. TFCalc software inputs an initial five-layer one-dimensional photonic crystal structure with a doped layer, a continuous target of the initial five-layer one-dimensional photonic crystal structure is firstly set, high reflection is set at 3-5 micron and 8-14 micron, and high transmission is set at 5-8 micron and 10.6 micron; secondly, a ''Needle'' layer is added by adopting two materials of germanium and zinc sulfide on an optimization parameter setting interface, film layers are continuously added to an optimal design film system, a plurality of layers are added at the same time, and local optimization is adopted before adding the Needle; and finally, a growing film is selected from Tunnelling parameters for structural optimization, the film is a 13-layer film structure formed by taking glass as a substrate and alternately forming germanium and zinc sulfide with different thicknesses, the two layers close to the air and the glass are germanium, and the film can achieve compatible stealth of the middle and far infrared wave band and the 10.6-micron laser wave band.

Description

technical field [0001] The invention relates to a design scheme of a stealth film, in particular to a design scheme of a middle-far infrared and laser-compatible stealth film, belonging to the technical field of stealth materials. Background technique [0002] In the infrared detection technology, the 3-5 μm band is the radiation range of the aero-engine tail flame and the engine exhaust pipe, and is the main working band of the infrared guidance and detection system of air equipment; the 8-14 μm band is the working band of the thermal imaging system, any Objects with a temperature above thermodynamic zero will radiate in the 8-14 μm band; CO with a working wavelength of 10.6 μm 2 As the main laser detection weapon, laser can be used for ranging, guidance, target indication and jamming, etc. [0003] The existing 3-5μm and 8-14μm infrared band selective high-reflection films are actually the superposition of two photonic crystals with forbidden bands in different wavelength...

AI Technical Summary

Problems solved by technology

[0003] The existing 3-5μm and 8-14μm infrared band selective high-reflection films are actually the superposition of two photonic crystals with forbidden bands in different wavelength ranges, and the one-dimensional photonic crystal structure is used to realize the high-reflection areas of the two infrared window bands in the middle and far range Usually there are problems such as long production cycle and high production cost

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