全球面镜卡塞格林式望远系统的设计  

Design of all-spherical mirror based Cassegrain telescopic system

作　　者：王子淳 郑联慧 余家富 肖荣辉[1] 许晓赋[1] WANG Zichun;ZHENG Lianhui;YU Jiafu;XIAO Ronghui;XU Xiaofu(School of Mechanical and Electrical Engineering,Sanming University,Sanming 365004,China)

机构地区：[1]三明学院机电工程学院,福建三明365004

出　　处：《光学技术》2021年第6期654-657,共4页Optical Technique

基　　金：国家自然科学基金青年项目(11803015);福建省自然科学基金面上项目(2020J01387);福建省中青年教师教育科研项目(JAT190722);三明学院科学研究发展基金项目(B201935)。

摘　　要：折反射式望远系统广泛应用于天文、航海等环境的观测需求。然而目前大部分的折反射式望远系统为提高其成像质量常采用非球面镜系统。由于非球面镜系统的镜头加工及组装等难度相对较高,为避免此类问题,论文利用Zemax OpticStudio光学设计软件设计一款具有易加工的全球面镜卡塞格林式望远系统。望远系统由一带孔的主反射镜、一次反射镜以及四个辅助透镜组成。其F数为2.6,焦距为760mm,工作波长在0.9~1.7μm,线性拦光比为0.45,MTF值在频率35lp/mm内均大于0.5,尺寸控制于Φ350×800mm以内。在上述技术指标的基础上,该系统能有效地校正像差,具有较好的成像质量。该结构方案有望为卡塞格林式折反射望远光学系统的设计提供新的思路。Cassegrain telescopic system has been widely employed in environmental observation such as in astrophysics and navigation.Currently available Cassegrain telescopic system mainly used aspheric mirror systems in order to gain satisfied imaging quality.However,aspheric mirror systems are difficult to fabricate and assemble.In the present study,an easier to be fabricated global Cassegrain telescopic system was designed by using the optical design software Zemax OpticStudio.The structure consists of a primary mirror with a hole,a secondary mirror,and four auxiliary lenses,which the F is 2.6 and the focal length is 760 mm.Its wavelength can be operated from 0.9 to 1.7μm and the linear block ratio about 0.45.MTF within the frequency of 35 lp/mm is great than 0.5,and the size(Φ) is small than 350×800 mm.According to the above specifications,the structure has a better imaging quality with better aberration correct capability.The proposed structure can provide a new way for designing Cassegrain reflectional telescopic optical systems.

关 键 词：光学设计 折反射式望远系统 成像质量 

分 类 号：O435.2[机械工程—光学工程] O439[理学—光学]