Design and fabrication of short-wave/long-wave infrared dichroic beam splitter

被引：0
|
作者：
Zhang Y. [1 ]
Wang Y. [1 ]
Sun X. [1 ]
Shen W. [1 ]
Liu X. [1 ]
Gu P. [1 ]
机构：
[1] State Key Laboratory of Modern Optical Instrumentation, Zhejiang University, Hangzhou
来源：
Guangxue Xuebao/Acta Optica Sinica | 2010年 / 30卷 / 02期
关键词：
Dichroic beam splitter; Optical thin film; Two-band infrared imaging system; ZnSe substrate;
D O I：
10.3788/AOS20103002.0597
中图分类号：
学科分类号：
摘要：
Short-wave /long-wave infrared dichroic beam splitters take an important role in two-band infrared imaging optical systems. The choice of substrate and coating materials are discussed. Ge, ZnSe and YbF3 were chosen as film materials and ZnSe as substrate; The coating reflecting the shortwave infrared light while transmiting the longwave infrared (8~12 μm) light is analyzed, and the beam splitter is manufactured by electronic-beam evaporation. The measured reflectivity and transmittance of corresponding band are all above 93%. Such dichroic beam splitters have been successfully applied to the actual optical system.
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页码：597 / 601
页数：4
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