Volume 5 Issue 6
Dec.  2012
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DONG Ke-yan, WANG Jian, SUN Qiang, WANG Hong-liang, LI Quan-xi, JIANG Hui-lin. Design of an airborne dual field-of-view middle wave infrared optical system[J]. Chinese Optics, 2012, 5(6): 596-601. doi: 10.3788/CO.20120506.0596
Citation: DONG Ke-yan, WANG Jian, SUN Qiang, WANG Hong-liang, LI Quan-xi, JIANG Hui-lin. Design of an airborne dual field-of-view middle wave infrared optical system[J]. Chinese Optics, 2012, 5(6): 596-601. doi: 10.3788/CO.20120506.0596

Design of an airborne dual field-of-view middle wave infrared optical system

doi: 10.3788/CO.20120506.0596
  • Received Date: 19 Sep 2012
  • Rev Recd Date: 16 Nov 2012
  • Publish Date: 10 Dec 2012
  • In order to meet the practical requirement of airborne infrared searching and tracking systems, a dual Field-of-View(FOV) middle wave(MW) infrared optical system is designed based on the MW cooled detector with 320 pixel?250 pixel and a staring focal plane array. The system adopts the secondary imaging structure and a shield is installed in the first image surface station to reduce the stray light effect. The design results show that the system has a 100% cold shield efficiency; F number of the system keeps a constant as 4 and the image surface remains stable when only one piece of the optical lens is moved to switch the focus length between 800 mm and 400 mm; the field curvature and the distortion are less than 0.04 mm and 2.5%, respectively, and the MTF is more than 0.5 at 16 lp/mm. Obtained results demonstrate that the image quality meets the operational requirement.

     

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