星敏感器光学系统参数的确定

光学系统是星敏感器的重要组成部分。选择合理的参数不但能确保星敏感器达到预期的性能，而且有助于降低产品的研制成本。本文介绍一种确定光学系统参数的新方法，包括通过参考比较已有星敏感器及其光学系统特性来选取新光学系统焦距、相对孔径和视场；根据所选取的参数预计星敏感器的捕获概率；采用综合恒星光谱方法确定光学系统中心波长和光谱范围。

Determination for Optic System Parameters of Star Sensor

he optical system is an important part of star sensors. Proper parameters of the optical system will not only insure the star seusor to achieve the expected performance,but also be helpful to reduce the cost of R&D. This paper describes a new method to select these parameters , including to determine the focus length,relative aperture and Field of View of new optical system in design by means of making reference to previous star sensors and their optical systems; to forecast the acquiring probobility of star sensor in accordance with selected param eters ; to determine the principal design wavelength and spectral coverage by means of integrat ing the spectrum of stars.