中国科学院南京天文光学技术研究所机构知识库

The edge sensor constitutes a critical component in the co-phase system of the large-aperture optical astronomical segmented mirror telescopes.Presently,electric edge sensors are commonly employed across various segmented telescopes,offering high precision.However,phenomena such as temperature and temporal drifts pose challenges,restricting their deployment in demanding environments.Our team developed a unique optical edge sensor based on fringes of equal thickness to circumvent these restrictions.This edge sensor can overcome these difficulties and provide high precision in the co-phase detection of segmented mirrors.The study presents both simulation and experimental findings about the performance of this edge sensor in co-phase detection.Results demonstrate that,in laboratory experiments,the maximum absolute error for this edge sensor prototype is 5 nm, satisfying the stringent requirements for the large-aperture segmented mirror telescopes.