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Photonic crystal composite film with both infrared protection and anti-laser-detection functions

A technology of photonic crystals and composite films, applied in optics, optical components, instruments, etc., can solve the problems of single infrared protective coating and inability to realize functional compatibility, and achieve improved battlefield survivability, long service life, and wide adaptability Effect

Active Publication Date: 2018-07-17
LANZHOU INST OF PHYSICS CHINESE ACADEMY OF SPACE TECH
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Problems solved by technology

Since infrared protection requires high reflection to electromagnetic waves (mainly 3 μm to 5 μm and 8 μm to 14 μm), anti-laser detection requires low reflection to electromagnetic waves (mainly 10.6 μm), that is, the mechanism of action of infrared protection and anti-laser detection is mutual Contradictory, so traditional infrared protective coatings or anti-laser detection coatings can only achieve a single function, and cannot achieve compatibility between the two functions

Method used

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  • Photonic crystal composite film with both infrared protection and anti-laser-detection functions
  • Photonic crystal composite film with both infrared protection and anti-laser-detection functions
  • Photonic crystal composite film with both infrared protection and anti-laser-detection functions

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Embodiment Construction

[0015] The present invention will be further elaborated below in conjunction with the accompanying drawings and specific embodiments, wherein the methods are conventional methods unless otherwise specified, and the raw materials can be obtained from open commercial channels unless otherwise specified.

[0016] A photonic crystal composite film compatible with infrared protection and anti-laser detection, the photonic crystal composite film is composed of photonic crystal film stack I and photonic crystal film stack II;

[0017] The central wavelength of the photonic crystal film stack I is 3800nm, which is formed by alternating arrangement of Ge layers with high refractive index and ZnS layers with low refractive index, and the total number of layers is 8 layers; wherein, the thickness of the 4 Ge layers is equal, The thicknesses of the four ZnX layers are equal; the specific thicknesses of the Ge layer and the ZnS layer are determined according to the refractive index of the s...

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Abstract

The invention relates to a photonic crystal composite film with both infrared protection and anti-laser-detection functions, which belongs to the technical field of surface engineering. The photonic crystal film is designed by connecting two photonic crystal film stacks with different central wavelengths in series. For the same composite film structure, the reflectivity to an infrared heat sourceis greater than 95%, and the reflectivity to a laser detection beam is less than 5%. Thus, the requirements of weaponry for both infrared protection and anti-laser-detection functions are satisfied. Moreover, the photonic crystal composite film has a long service life, high reliability and a wide range of application, and greatly improves the survivability of weaponry on the battlefield.

Description

technical field [0001] The invention relates to a photonic crystal composite thin film capable of realizing mutual compatibility of infrared protection and anti-laser detection, and belongs to the technical field of surface engineering. Background technique [0002] Weapons and equipment will inevitably produce infrared radiation during use. Once the infrared radiation signal generated is captured by the enemy's infrared-guided weapons, it will pose a fatal threat to our equipment. In addition, the enemy can detect our equipment through laser detectors. Once recognized by the enemy's laser-guided weapons, it will also have an adverse effect on our weapons and equipment. Therefore, infrared protection and anti-laser detection protection must be carried out for weapons and equipment. Since infrared protection requires high reflection to electromagnetic waves (mainly 3 μm to 5 μm and 8 μm to 14 μm), anti-laser detection requires low reflection to electromagnetic waves (mainly ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B1/00
CPCG02B1/005
Inventor 李坤熊玉卿徐嶺茂王虎李学磊
Owner LANZHOU INST OF PHYSICS CHINESE ACADEMY OF SPACE TECH
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