一个新的泛卡塞格林望远镜系统.PDFVIP

一个新的泛卡塞格林望远镜系统 潘君骅 （苏州大学 现代光学技术研究所, 江苏 苏州 215006） 摘要：将卡塞格林系统的主镜及次镜都取球面，在焦面前加 2片以上改正透镜，而将作 为 密封窗的平行平板的一面加 4次方项，可以设计出具有相当大视场，像质优良的新光学系统 。 平板上的 4次方非球面是凹面性质，它的制造，在周边铰支而外加均布载荷时可以加工为 球面，释放均布载荷后该面即弹回成所要的 4次非球面。所以，此系统从光学工艺角度看只 有球面和平面。文中设计了 4个不同相对口径系统：F/3,F/5,F/8,F/10。口径和视场相同： φ=300 mm, 2ω=1°，像质都接近或达到衍射极限。 关键词:平行平板; 泛卡塞格林系统; 4次方项; 均布载荷; 铰支 中图分类号：TH751文献标识码: A　　 New PAN-Cassegrain telescope system PAN Junhua (Institute of Modern Optic Technology, Suzhou University, Suzhou 215006,China) Abstract A new optical system with a fairly large field of view and excellent image quality can be designed by making both the surfaces of primary and secondary mirrors in the Cassegrain system spherical, th adding two or more correcting lenses in front of the focal plane, and adding a 4 order term to one surface of the parallel plates as a hermetically sealed chamber. The aspheric surface of the plate with 4th order term is concave, and it can be made spherical by grinding it with hinge support around and equal loads applied, and after the equal loads being released, the surface springs back to form the th desired aspherical surface with 4 order term. So, from the viewpoint of optical technology, this system has spheres and planes only. Four systems with relative apertures of F/3,