1 September 2004 Design of a novel star tracker optical system
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Abstract
We present a novel method of increasing the focal depth of an optical system that can be used in a star tracker. The method is based on a special phase plate that is placed in the vicinity of the aperture stop of an optical system to produce the required spot size over a large focal depth. Phase retardation was applied to a lens system having a focal length of 30 mm, an F-number of 2, a working wavelength range of 0.5~0.75 μm and a view angle of 20 degrees. The performance of a lens having a suitable quartic phase was analyzed, and it was shown that the focal depth of such a lens system can be extended more than threefold as compared to a system having no phase plate.
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Xinping Liu, Xinping Liu, Xianyang Cai, Xianyang Cai, Costel Flueraru, Costel Flueraru, Shoude Chang, Shoude Chang, Chander P. Grover, Chander P. Grover, } "Design of a novel star tracker optical system", Proc. SPIE 5418, Spaceborne Sensors, (1 September 2004); doi: 10.1117/12.541609; https://doi.org/10.1117/12.541609
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