SHI Jian-tao, ZHAO Xing-mei, GUO Hong-xiang. Fabrication of anti-reflection film on zinc selenide substrate[J]. Journal of Applied Optics, 2008, 29(supp): 15-17.
Citation: SHI Jian-tao, ZHAO Xing-mei, GUO Hong-xiang. Fabrication of anti-reflection film on zinc selenide substrate[J]. Journal of Applied Optics, 2008, 29(supp): 15-17.

Fabrication of anti-reflection film on zinc selenide substrate

  • Since the crystal ZnSe is soft and low transparent, a thin-film coating must be deposited on its surface to increase its transparence and machine strength. A method of depositing anti-reflection film on the surface of ZnSe substrate is introduced, which adopts ion source to deposit zinc sulfide (ZnS) as a combinative layer of crystal zinc selenide (ZnSe). The two kinds of different fluoride material were evaporated as a low refractive index and protective layer by using the total evaporation technology. A film system which meets the standard of environment and rigidity was prepared. Besides, its average transmissivity attains to 98% at the range of 3μm~5μm.
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