变倍Maksutov-Cassegrain望远系统设计

Zoom Maksutov-Cassegrain Telescope System Design

基于系统要求以及Maksutov-Cassegrain望远物镜和变倍目镜的设计原理,设计了一种小型连续变倍Ma-ksutov-Cassegrain望远系统。为降低成本,系统中所有光学表面均采用球面。物镜部分采用弯月型厚透镜和一组双胶合透镜来更好地校正像差;目镜部分采用了无后固定组、像面在内的结构来缩短系统长度,并利用相关程序对变焦曲线进行了拟合。本系统通过目镜的连续变焦配合固定焦距的物镜实现了25～75倍的视觉放大倍率,各种像差都得到了很好的校正,满足指标要求。

Based on the requirements of system and designing principles of Maksutov-Cassegrain telescope objective and zoom eyepiece,a zoom Maksutov-Cassegrain telescope system with small size is designed.In order to reduce the cost,all optical surfaces of this system are spherical.A meniscus lens and a cemented lens are used in objective to correct the aberrations.A structure with no rear fixed group and inside-image is adopted into the eyepiece to shorten the length of system.The zoom curve is fitted by using the relative program.A 25-75 times visual magnification is obtained through the zoom eyepiece and objective.Each aberration is corrected well,and the designing results meet the requirements.