星敏感器是一种高精度用于航天姿态测量的仪器，它主要由光学系统、图像传感器电路和控制与数据处理电路三部分构成，其中光学系统是用于成像的核心部分。设计了一个大相对孔径、大视场、宽光谱星敏感器光学系统，采用双高斯对称基本结构改进而成，并借助Zemax 软件实现了系统成像质量的优化过程。该系统焦距为60 mm，F数为1.5，视场角2ω = 20° ，光谱范围0.48~0.68μm，筒长比焦距为1.81，结构较紧凑，此系统设计结果可为星敏感器光学系统设计提供参考依据。

Star sensor is a kind of instruments which is used in measuring the spacecraft attitude with its highprecision. It mainly consists of three parts: an optical system, an image sensor circuit and the control of data processing circuit, of which the optical system is the core part of in imaging forming system. In this paper, the optical star sensor system of large relative aperture, lager view, broad spectrum is designed. Through the improvements of the basic structure symmetric double Gauss, a kind of optical structures of optimization process with perfect imaging quality is realized on the stage of Zemax software. The system has a compact structure with its properties: 60 mm in focal length, F number of 1.5, field of view of 20°, and the range of working wavelength is 0.48~0.68 μm, and the ratio of length and focal length is 1.81. The structure is compact and it achieves some special requirements aberration. The end result of this system is to provide reference data for star tracker optical system design.