Laser infrared multiband compatible stealth film made of non-metallic material and preparation method thereof

Abstract

The invention relates to a laser infrared multiband compatible stealth film made of a non-metallic material and a preparation method of the laser infrared multiband compatible stealth film; the laserinfrared multiband compatible stealth film is of a multilayer film structure, and the multilayer film structure comprises a substrate, and calcium fluoride layers and tellurium layers which are sequentially and alternately stacked on the substrate from inside to outside; the refractive index of the calcium fluoride layer is 1.06-1.46, and the refractive index of the tellurium layer is 2.3-6.2; thefilm adopts a non-metal material to realize compatible stealth of middle and far infrared bands (3-5microns and 8-14microns) and laser wavelengths (1.064microns and 10.6microns), has relatively strong heat dissipation capability in a non-detection band (5-8microns), and does not contain a metal material, so that radar wave attenuation is very weak, and compatible stealth with a radar wave-absorbing material is easy to realize; if applied to military equipment, the film has important significance in protecting important military targets of our army and improving the survival probability of weaponry.

Description

technical field [0001] The invention relates to the technical field of military stealth, in particular to a non-metallic laser infrared multi-band compatible stealth film and a preparation method thereof. Background technique [0002] In modern warfare, the wide application of multi-band photoelectric reconnaissance and precision-guided weapons poses a huge threat to the survival of military targets; stealth, as an important countermeasure, aims to reduce the radiation contrast between the target and the background or weaken the echo Signal; resulting in infrared stealth, laser stealth, radar stealth and other military requirements. [0003] In order to achieve a good multi-band stealth effect, stealth materials are required to have low emissivity (high reflectivity) in the mid-to-far infrared detection band (3-5μm and 8-14μm), and at the working wavelength of laser ranging or laser target designator (1.064μm and 10.6μm) have low reflectivity. For opaque materials, low emis...

AI Technical Summary

Problems solved by technology

However, low emissivity means that the radiation emitted is weak, which will affect the heat dissipation of the target itself, and may seriously affect the normal operation of the target. Therefore, to achieve good stealth, the problems of stealth and heat dissipation must be solved.

[0005] Infrared stealth can also be achieved by using metal-containing materials to make coatings or films, but such coatings or films have strong reflections on radar waves because they contain metal materials, which contradicts the low reflection expected by radar stealth

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