自重作用下中心支撑主反射镜面形变化研究  

Study on the Surface Figure Changes or primary Mirror Centerally Supported Under Gravity Load

作　　者：吴清文[1] 卢锷[1] 王家骐[1] 张学军[1] 牛晓明[1] 

机构地区：[1]中国科学院长春光学精密机械研究所

出　　处：《光学精密工程》1996年第4期23-28,共6页Optics and Precision Engineering

摘　　要：利用ＦＥＭ研究了弯月形主反射镜中心支撑条件下自重所引起的面形变化，通过计算所得镜面变形的ＰＶ值和ＲＭＳ值来评价是否超差，利用Ｚｅｒｎｉｋｅ多项式进行数据处理，分解出中心支撑方式下自重引起的像差成份，并相应地提出了提高成像质量的改进措施。最后进行了主反射镜背部形状优化。The surface figure changes of menisctls primary mirror, centrally supported and loadedby the gravity (1g), are studied. The PV and RMS values are used to determine whether thedeformation is reasonable or not. Data processing is done with the help of zernikepolynomials, the aberration composition of the mirror Supported in this way is found', andsome approaches to improve image quality are carried out. At last the rear profile of themirror is optimized.

关 键 词：主反射镜 天文望远镜 自重 面形 有限元 

分 类 号：TH751[机械工程—仪器科学与技术]