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Recently, researchers from the Institute of Solid State Physics, Hefei Institute of Material Science, Chinese Academy of Sciences, have used the sol-gel method to prepare a variety of high-efficiency infrared anti-reflection films based on infrared substrates
.
The refractive index of the base material of the infrared optical element is relatively high, and there is often serious reflection on its surface, which reduces the transmittance of infrared light
.
In order to maximize the transmission of infrared light, it is necessary to plate an anti-reflection film on its surface
In this study, the infrared material CdSe was used as the substrate, and the two-band double-layer infrared anti-reflection film was successfully prepared by rationally designing the sol composition and adding additives
.
The bottom layer of the membrane layer is a porous TiO 2 membrane, and the top layer is a Si(Ti)O 2 particle membrane.
2 2
In addition, this study used infrared material TeO 2 as the substrate, combined with theoretical calculations, prepared two anti-reflection films with optimized refractive index by adjusting the composition of the sol, and discussed the effect of additives on the film.
The influence of layer structure and thermal stability
.
The results show that both coatings exhibit high transmittance, the best transmittance is close to 100%, and the peak wavelength of antireflection is adjustable between 1550nm-2460nm; the low surface roughness of the film effectively inhibits surface reflection
2 6 2 6 2
Related results were published on Colloids and Surfaces A: Physicochemical and Engineering Aspects and Infrared Physics and Technology
.
The research was supported by the "14th Five-Year Plan" equipment pre-research key laboratory fund project and the National Natural Science Foundation of China fund project
