摘要
可靠地测定条纹的复相干度和保持干涉条纹的稳定性是恒星干涉测量中至关重要的一环。介绍几种测定条纹的模和相位的方法以及从条纹信息中提取光程差以实现条纹跟踪的方法。不同的方法适用于不同的观测条件和观测目的。
The two purposes of fringe detecting are to maintain a suitably stable fringe pattern and to estimate the complex degree of coherence |γ| of a source. Because of the atmospheric turbulence with high time frequencies and generally low light levels falling on the detectors, the detectors must operate in a digital photon counting mode with high time sensitivity. This paper describes some of the methods for detecting and tracking the fringe patterns, and explains that different methods are suitable to different observational objects and modes.
出处
《陕西天文台台刊》
CSCD
1991年第1期65-70,共6页
Publications of The Shaanxi Astronomical Observatiory
