Novel Optical Multilayered Coatings with Characteristic Reflectivity of Visible,Near Infrared and Thermal Infrared Bands Surround by Green Vegetation

We addressed the subject of stealth technology in the daytime of large target surrounded by green vegetation under wide spectral irradiations:including that in the visible, near-and thermal infrared bands by analyzing the target's radiation behavior.The reflectivity of the newly-developed multi-layered coatings, mainly comprising 29 layers of Te, ZnSe and MgF₂ thin films, was mathematically modeled, theoretically analyzed and numerically simulated.The simulated results show that the reflective spectrum of the novel multi-layered coatings in visible-near infrared bands is similar to that of green vegetation, and that their optical brightness characteristics are almost identical.When it comes to multi-band compatible stealth, the novel multi-layered coating outperforms the conventional coatings and photonic crystal structures.Moreover, the average emissivity in the mid-far infrared atmospheric window (estimated to be 0.232 and 0.195, respectively) is capable of partly suppressing the thermal radiation of the target.