A catadioptric infrared dual band optically passive athermal optical system |
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Authors: | Yu Bai Tingwen Xing Yadong Jiang |
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Affiliation: | 1.Institute of Optics and Electronics,Chinese Academy of Sciences,Chengdu,China;2.University of Electronic Science and Technology of China,Chengdu,China;3.University of Chinese Academy of Sciences,Beijing,China |
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Abstract: | The paper proposes a catadioptric infrared dual band optical system based on catadioptric configuration and optically passive athermal design method. The system shares primary mirror, secondary mirror and collimating lens group, and achieves abruption in longwave infrared and midwave infrared using a dichroic beam splitter. The influence of temperature on optical parameters, the design theory and design method are analyzed. A design example is presented. The detailed optimization design method and some considering factors in engineering design moment are discussed. The design results illustrate that the system can obtain good image quality in environment temperature of 10–40?°C, which could satisfy the design requirement. The actual test result not only satisfies the design requirement, but also validates the availability of the method in the paper. |
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