Three-mirror telescopes design and optimization 三反镜的设计及优化.pdfVIP

Three-mirror telescopes: design and optimization Paul N. Robb A set of equations is developed which yields the constructional parameters of three-mirror all-reflecting op- tical systems. An equation whose factors allow the shape of the image surface to be controlled is also de- rived. A method of optimizing the performance of three-mirror systems by varyingthe inputs to the design equations is described, and the results are compared with those obtained through a conventional numerical design optimization. The technique described is shown to be markedly superior to the usual optimization method of varying the constructional parameters of the system. Introduction many of the optical design computer programs in use Optical systems employing three reflecting surfaces today. An equation is developed whose factors allow have been proposed by a number of designers, dating a system to be designed having a specified Petzval as far back as 1935with Pauls three-mirror camera. curvature through modification of one of the funda- 2 proposed a rather similar system in 1942,and mental input parameters. A procedure is described Lagrula which may be used to optimize the performance ofthe 3 has indicated that varients of the Paul-Lagrula Baker configurations were developed in the U.S. during 1942. design by varying only the fundamental input param- 4 introduced eters. More recently, in 1966Meinel and Shack a special form of the three-mirror