Research on Compatible Green Stealth Photonic Thin Film against Near Infrared and 1. 54μm Laser

摘要

A compatible green stealth photonic thin films against near infrared and 1. 54μm laser, based on the structure of photonicthin films are designed to achieve compatible stealth of targets in background of green plants. Optical thin films have theadvantage of regulating characteristics of the beam transmission. In this paper, the thin films are designed to simulateNIR Plateau of the spectral characteristics of green plants in the range of 0.78μm to 1.3μm and form a reflection Valleyat 1.54μm. Based on the transfer matrix method (TMM) of thin-films optical theory , the Needle Algorithm andTunneling Algorithm of thin-film automatic design methods are combined to optimize and design the green thin films.Finally, the near infrared green optical thin films with NIR spectral characteristics similar to the green plants aredesigned. And the spectral curve has a reflection valley near the center wavelength of 1.54μm ,and the reflectivity of thewavelength of 1.54μm is as low as 5%,achieving the stealth of the laser detector with the wavelength of 1.54 μm. On thisbasis, the influence of four incident angle of 0°,10°,20°and 30° on the spectral curve is analyzed. The results show thatthe spectral curves still meet the design requirements.