Adaptive alignment of fixed mirror by phase detection
YU Li-min, DAI Zuo-xiao, WANG Mo-chang, SHI Zhi-hua(Shanghai Institute of Technical Physics, Chinese Academy of Sciences, Shanghai 200083, China)
In order to keep the dynamic alignment Fourier transform spectrometer (FTS) between the moving mirror and the fixed mirror while the mirrors are moving and the temperature is changing, a phase detecting method is proposed for magnitude and tilt direction. The structure of dynamic alignment system and the basic principle of the phase detection are discussed. Fast steering mirror is adopted in the self-alignment system. The features and structure of the fast steering mirror are detailed. Alignment results show that dynamic alignment has obvious effects on performance.
【CateGory Index】： TH744.1