大口径望远系统中主次镜系统的装调方法  

An Alignment of Primary and Secondary Mirrors for Optical System in Large Telescopic

作　　者：韩娟[1] 段嘉友[1] 陈建军[1] 张钧[2] 康健[1] 

机构地区：[1]中国科学院西安光学精密机械研究所系统工程部,陕西西安710115 [2]=p国航空工业集团公司西安飞行自动控制研究所导航部,陕西西安710065

出　　处：《中国激光》2012年第7期231-236,共6页Chinese Journal of Lasers

基　　金：国家973计划(2009CB724006)资助课题

摘　　要：为了实现大口径望远系统中主次镜系统的装调,并提高光学成像质量,采用了一种调整主次镜相对位置的新方法高精度光学定心法。该方法不同于传统的修切垫圈调整法,可同时消除主次镜系统中因次镜相对主镜的倾斜引起的像散及因次镜偏心引起的彗差,不仅大大降低了装调难度,而且消除了系统的不稳定性。另外,通过干涉自准检验和十字丝代替光轴相结合的办法,建立了一套新的主次镜系统的检验方案。通过对主镜口径为Φ520mm的R-C系统的实际装调和检验表明,组合前后主、次镜两组件的面形波像差均方根值(RMS)均小于等于0.03λ(λ=632.8nm),主次镜光轴角晃动量分别为0.72″、2″,两个镜子的光轴与其各自镜框端面的垂直度均小于等于0.005mm,主次镜系统同心度小于等于0.01mm,满足系统面形波像差均方根值小于等于0.07λ的设计要求。In order to realize the alignment of primary and secondary mirrors in large aperture telescopic system and improve optical imaging quality, a new method for adjusting comparative position and pose between primary and secondary mirrors is introduced named high-precision alignment machining. Other than ＇a traditional method of adjusting washer, the method can eliminate astigmatism aroused from inclination between primary and secondary mirrors, and coma aberration aroused from secondary mirrorrs eccentricity at the same time. The method reduces the alignment difficulty markedly and avoids systemic instability. In addition, a new method for primary and secondary mirrors test is established by combination of interference auto-collimating tests and cross wire application which replaces optical axis. The alignment and test＇s result from the qb520 mm primary and secondary mirrors shows that root-mean-square （RMS） value of wave aberration hardly changes before and after assembling, and is entirely less than 0.03λ（λ= 632.8 nm）, axial angles swaying in primary and secondary mirrors are 0.72＂ and 2＂, respectively, the verticalities of two mirrors optical axis and respective frames are less than 0. 005 mm, primary and secondary mirrors＇s concentricity is less than 0.01 mm, and the RMS value of the system is less than 0.7λ after interation, which achieves design requirements.

关 键 词：成像系统 主次镜 定心加工 装调过程 干涉自准检验 

分 类 号：TH743[机械工程—光学工程]