Villa J J
Appl Opt. 1972 Aug 1;11(8):1814-21. doi: 10.1364/AO.11.001814.
The classical Schupmann medial telescope is free of the secondary-spectrum residual associated with large refractors. The difficulties in obtaining large glass disks of the necessary optical quality and the problem associated with their mounting preclude the use of this unconventional lens in large scale astronomical systems. However, to circumvent these limitations, the Schupmann lens was modified by replacing the refractive objective with a spherical mirror producing a new catadioptric lens configuration adaptable to large-scale astronomy. The design parameters and performance data are given for an f/5.4, 5.5-m focal length design covering a 2 degrees full field.
经典的舒普曼内侧望远镜不存在与大型折射望远镜相关的二级光谱残余。获取具有必要光学质量的大型玻璃盘存在困难，以及与之相关的安装问题，这使得这种非常规透镜无法在大型天文系统中使用。然而，为了规避这些限制，通过用球面镜取代折射物镜对舒普曼透镜进行了改进，从而产生了一种适用于大型天文学的新折反射透镜配置。给出了一个f/5.4、焦距为5.5米、覆盖2度全场的设计的设计参数和性能数据。
