In this paper, the prism's static imaging relationship and dynamic imaging theory are used to express the influence of the prism on the optical path in an ideal state. At the same time, the influence of manufacturing error and position error of the prism on the optical path is also analyzed and the corresponding action matrix is deduced. The feasibility of using prism deflection to compensate for prism manufacturing error is discussed, which provides a feasible solution to the general problem, and the corresponding theories are illustrated using the right angle prism as an example.
Star sensor is a high accuracy sensitive instrument for attitude determination, and the optical system is an essential part of the star sensor. According to the user requirements and CODE V patent library, the optical lens of a star sensor with large relative aperture and wide-spectrum range is optimized. The final design consists of 8 spherical lenses. The focal length is 50mm, the relative aperture is 1/1.35, the field of view is 7° × 7° (the diagonal field is 9.9°), and the spectral range is 500nm to 800nm. The design results show the optical lens has good performance. The distortion is less than 1%, the energy concentration is more than 80%, and the MTF of all fields of view is close to each other. The energy concentration of the spot diagram on the off-axis field of view and the on-axis field of view remains basically the same. The optical system meets modern design requirements for the star sensors.
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