Study on a new type of green infrared stealth film material

Ruihuang Liu; Haitao Hu; Jiaming Shi

doi:10.1117/12.2505540

12 December 2018 Study on a new type of green infrared stealth film material

Ruihuang Liu, Haitao Hu, Jiaming Shi

Proceedings Volume 10846, Optical Sensing and Imaging Technologies and Applications; 108462L (2018) https://doi.org/10.1117/12.2505540
Event: International Symposium on Optoelectronic Technology and Application 2018, 2018, Beijing, China

Abstract

With the rapid development of optoelectronic technology, multi-band reconnaissance equipments have been widely used in the military field, which puts forward the requirement of multi-band compatible stealth for the targets. Actually, most of military targets, with strong heat sources, are hidden in the background of green plants. Therefore, to realize muiti-band compatible stealth means that the target surface should not only simulate the spectral characteristics of green vegetation in visible light and near infrared wavebands, but also have low emissivity in far infrared waveband to suppress the thermal radiation. However, it is difficult to obtain such special spectral characteristics for traditional coatings. A a new kind of man-made structure function material, photonic crystals (PC) could realize thermal infrared compatible because of its high-reflection photonic band gap. Firstly, taking ZnSe and Te as dielectric materials, a periodic PC film system is designed by using the characteristic matrix method. Then, using needle method, a method to design optical film system, ZnSe and the MgF₂ films with different thicknesses are respectively inserted to the PC structure, and the ideal film structure is eventually obtained. This film material has a reflectance spectrum curve similar to that of green plants in 0.4-1.2 μm waveband. Simultaneously, the reflectivity in 8-12 μm band is 0.95, which can effectively reduce the thermal radiation intensity of the target surface. The above results show that this new type of film material can achieve multi-band compatible stealth for visible light, near infrared and far infrared bands under the greenwood background.

Citation Download Citation

Ruihuang Liu, Haitao Hu, and Jiaming Shi "Study on a new type of green infrared stealth film material", Proc. SPIE 10846, Optical Sensing and Imaging Technologies and Applications, 108462L (12 December 2018); https://doi.org/10.1117/12.2505540

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KEYWORDS

Infrared radiation

Reflectivity

Thin films

Vegetation

Photonic crystals

Far infrared

Refractive index

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