17 May 2016 HfO2/SiO2 multilayer based reflective and transmissive optics from the IR to the UV
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Abstract
HfO2/SiO2 multilayer based reflective optics enable threat detection in the short-wave/middle-wave infrared and high power laser targeting capability in the near infrared. On the other hand, HfO2/SiO2 multilayer based transmissive optics empower early missile warning by taking advantage of the extremely low noise light detection in the deep-ultraviolet region where solar irradiation is strongly absorbed by the ozone layer of the earth’s atmosphere. The former requires high laser damage resistance, whereas the latter needs a solar-blind property, i.e., high transmission of the radiation below 290 nm and strong suppression of the solar background from 300 nm above. The technical challenges in both cases are revealed. The spectral limits associated with the HfO2 and SiO2 films are discussed and design concepts are schematically illustrated. Spectral performances are realized for potential A and D and commercial applications.
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Jue Wang, Jue Wang, Gary A. Hart, Gary A. Hart, Jean Francois Oudard, Jean Francois Oudard, Leonard Wamboldt, Leonard Wamboldt, Brian P. Roy, Brian P. Roy, "HfO2/SiO2 multilayer based reflective and transmissive optics from the IR to the UV", Proc. SPIE 9822, Advanced Optics for Defense Applications: UV through LWIR, 98220Z (17 May 2016); doi: 10.1117/12.2219752; https://doi.org/10.1117/12.2219752
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