摘要
本文论述了偏置导星原理和偏置星跟踪器的机械,光学设计,重点突出了检测系统的电路设计。强调前置放大器在整个信号检测系统中的重要性,详细分析了相关器的原理和性能,成功地运用于信号检测系统中。整个系统对标定光源测试结果表明,该仪器完全能够跟踪4等星,同时运用等效噪声模型计算了输入端的等效输入噪声,并讨论屏蔽和干扰方面的问题,对它和球载其它系统的联合使用作了简单的叙述。
The paper describes the offset guiding principle and outlines the mech-anical and optical design of OST. The circuit design of the signal-detection system is pressented, particularly of the preamplifier. The principle and characteristics of the correlator are analysed. The measurement with the calibration light source shows the system can track a star of the fourth magnitude easily. At the same time the equivalent input noise is computed with equivalent input noise model. Electromagnetic shielding and disturbance are discussed, and also a description about the operation of the system is given.
