Design and development of far infrared (FIR) filters for space applications |
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| Institution: | 1. Shenzhen Key Laboratory of Laser Engineering, Guangdong Provincial Key Laboratory of Micro/Nano Optomechatronics Engineering, Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province, College of Physics and Optoelectronic Engineering, Shenzhen University, Shenzhen 518060, China;2. Key Laboratory of Advanced Optical Precision Manufacturing Technology of Guangdong Higher Education Institutes, Shenzhen Technology University, Shenzhen 518118, China;3. Han’s Laser Technology Industry Group Co., Ltd., Shenzhen 518057, China |
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| Abstract: | Theoretical/experimental studies on design and development of FIR filters have been carried out. A simple design consisting of a staggered edge filter and a four cavity Fabry-Perot filter, has been developed, for the first time, which meets the required pass band characteristics anywhere in 2–20 μm and completely eliminates transmission in the rest of the infrared spectrum. A typical designed filter useful in 14–16 μm band has been realised experimentally. The resulting filters satisfy the stringent spectral and durability requirements laid down as per MIL-F-48616. |
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