Volume 15 Issue 5
Sep.  2022
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FU Qiang, YAN Lei, TAN Shuang-long, LIU Yang, WANG Ling-jie, ZHANG Xin. Light-and-small optical systems by metal-based additive manufacturing[J]. Chinese Optics, 2022, 15(5): 1019-1028. doi: 10.37188/CO.2022-0128
Citation: FU Qiang, YAN Lei, TAN Shuang-long, LIU Yang, WANG Ling-jie, ZHANG Xin. Light-and-small optical systems by metal-based additive manufacturing[J]. Chinese Optics, 2022, 15(5): 1019-1028. doi: 10.37188/CO.2022-0128

Light-and-small optical systems by metal-based additive manufacturing

doi: 10.37188/CO.2022-0128
Funds:  Supported by Youth Innovation Promotion Association,CAS (No. 2021221); Youth Growth Technology Program of Jilin Province Science and Technology Development Plan (No. 20210508054RQ)
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  • Corresponding author: fuqianghit@163.com
  • Received Date: 14 Jun 2022
  • Rev Recd Date: 07 Jul 2022
  • Available Online: 03 Aug 2022
  • In order to realize the target of light and small, low radiation and large field of view of the long-wave infrared catadioptric optical system for deep-space low-temperature target detection, the local cooling optical system, topology optimization, metal-based mirror design, additive manufacturing, Single Point Diamond Turning (SPDT) for metal mirrors and surface modification are studied. First of all, a compact catadioptric optical system with partially cooled is designed, in which the aperture is 55 millimeters, the focal length is 110 millimeters and the field of view is 4 degrees by 4 degrees. Secondly, the primary mirror assembly, the secondary mirror assembly and the connecting baffle are designed using the topology optimization theory, and the third order mode and fourth order mode reach 1213.7 Hz. Then, the front group optical mirrors assembly are developed by means of additive manufacturing, SPDT, surface modification and surface gold plating. We complete the optical mechanical assembly using the centering assembly method. Finally, the performance of the system after optical mechanical centering is tested. The test results show that the Modulation Transfer Function (MTF) curves of the optical system reach the diffraction limit in the whole field of views, and the weight is only 96.04 grams. Additive manufacturing method can be used as an effective means to improve the performance of optical systems.

     

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