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Laser, infrared and microwave compatible stealth material as well as manufacturing method and application thereof

A stealth material, laser technology, applied in metal material coating process, optics, optical components, etc., can solve the problems of short wavelength, short microwave, less laser wavelength, etc., to achieve film thickness, uniformity control, process optimization Effect

Active Publication Date: 2020-12-22
NANJING UNIV OF INFORMATION SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0012] However, the existing technology is mostly researched on a single-function camouflage material, such as CN201910952096.4 Chinese patent (only has a reflectivity of 9% when the laser wavelength is 10.6 μm, and involves few laser bands; poor infrared stealth effect; no microwave stealth effect ); CN201210459422.6 Chinese patent (infrared stealth effect is poor, involving few bands; no laser, microwave stealth effect); CN201110052236.6 Chinese patent (no laser stealth effect, infrared difference, microwave short)
The above Chinese patent documents disclose several stealth materials respectively, which have both infrared / radar or infrared / laser compatible stealth properties, but none of the three compatible stealth properties of laser / infrared / radar, and laser, infrared, and radar are involved. short band

Method used

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  • Laser, infrared and microwave compatible stealth material as well as manufacturing method and application thereof
  • Laser, infrared and microwave compatible stealth material as well as manufacturing method and application thereof
  • Laser, infrared and microwave compatible stealth material as well as manufacturing method and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0043] Optimizing the One-Dimensional Photonic Crystal Structure of Multilayer Film System

[0044] 1. Determine the material of the multilayer film system

[0045] According to the working wavelength of laser, infrared and radar detection in the existing detection technology, determine the fundamental frequency of multi-layer film system photonic crystal: laser band: 1.06, 1.54, 10.6 μm; infrared band 3-5 μm and 8-14 μm; radar band 2- 18GHz, such as figure 2 shown.

[0046] Using the characteristic matrix method to calculate the refractive index and thickness constraint formula of the multilayer film system material:

[0047] Such as image 3 As shown, the present invention mainly considers two kinds of different relative permittivity ε a =n a 2 , ε b =n b 2 , a one-dimensional periodic structure composed of alternately arranged thin film dielectric layers of thickness a and b. The spatial period is d=a+b. The TE mode polarized light with Bloch vector k enters the m...

Embodiment 2

[0126] Optimization of the preparation process of multilayer film system one-dimensional photonic crystal

[0127] 1. Target selection and coating basic process parameters

[0128] The selected targets and specifications are as follows: the target ZnS has a purity of 99.99%, and the specification is Φ60×3mm+Cu (Φ60×2mm); the target Ge has a purity of 99.99%, and the specification is Φ60×5mm; ZnSe, whose purity is 99.99%, has a specification of Φ60×3mm+Cu (Φ60×2mm).

[0129] During the coating process, the distance between the target and the substrate is 50mm, the background vacuum value is 6.0×10-4Pa, the reaction gas is a high-purity Ar gas atmosphere, and the flow rate is 15mL / min.

[0130] 2. Method for calculating film thickness by ellipsometry

[0131] Due to the thin thickness and strong absorption of Ge film and ZnS film, the spectral curve method is not suitable for measuring thickness. This project uses ellipsometry to determine the thickness and deposition rate of ...

Embodiment 3

[0165] Stealth material product and preparation example of the present invention

[0166] A kind of laser, infrared, microwave compatible stealth multi-layer film system material of the present invention, its structural schematic diagram is as follows figure 1 As shown, it is a layered structure. The multilayer film structure of the present invention is prepared by sputtering on PET as a substrate, and the multilayer film structure includes from bottom to top:

[0167] ZnSe(1850nm), Ge(450nm), ZnSe(1850nm), Ge(450nm), ZnSe(1850nm), Ge(450nm), ZnSe(1850nm), ZnS(125nm), ZnSe(1850nm), Ge(450nm), ZnSe (1850nm), Ge (450nm).

[0168] In this embodiment, a research and preparation method of a laser, infrared, and microwave compatible stealth multilayer film structure includes the following steps:

[0169] The first step: according to figure 2 The shown is compatible with the stealth overall target, and the laser wavelength, infrared band, microwave band and their reflection coef...

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Abstract

The invention discloses a laser, infrared and microwave compatible stealth material. The laser, infrared and microwave compatible stealth material adopts a multi-layer film system structure and comprises multiple layers of periodic layered structures; and each periodic layered structure comprises a ZnSe film and a Ge film. According to the laser, infrared and microwave compatible stealth material,a multilayer film system one-dimensional photonic crystal structure design with the periodic structures is carried out on the stealth material, so that the stealth material has laser, radar and infrared stealth properties.

Description

technical field [0001] The invention belongs to the technical field of functional materials, and relates to laser, radar and infrared camouflage materials, in particular to a design and preparation method of a laser radar infrared compatible one-dimensional photonic crystal. Background technique [0002] Laser has the characteristics of high brightness, good directionality, good monochromaticity, and good coherence, and has been widely used in the military field. Since the 1960s, various laser equipment (laser range finders, laser guidance devices, laser radars, etc.) that use laser beams as information carriers have been equipped with troops. [0003] Taking lidar detection as an example, it uses laser light to transmit detection signals to the target, and then compares the transmitted signal with the received signal reflected from the target to obtain information such as the target position and motion state, so as to detect aircraft, missiles, etc. Target detection, track...

Claims

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Application Information

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IPC IPC(8): C23C14/35C23C14/06C23C14/14G02B1/00G02B5/00G02B5/08
CPCC23C14/35C23C14/0629C23C14/14G02B1/005G02B5/003G02B5/0816
Inventor 黄啸谷张云柯马亚斌张兰
Owner NANJING UNIV OF INFORMATION SCI & TECH