Jones D J, James W E
Appl Opt. 1992 Aug 1;31(22):4384-8. doi: 10.1364/AO.31.004384.
The aberrations of a spherical mirror of moderate aperture ( approximately f/5) can be corrected by a lens system near the focal plane. A four-element lens system is necessary to provide a satisfactory state of correction over a full field of 0.5 deg. The design of such a lens system is described with emphasis on the intrinsic properties of each component and the logic behind the choice of layout.
中等孔径（约f/5）球面镜的像差可通过焦平面附近的透镜系统来校正。要在0.5度的全场范围内提供令人满意的校正状态，需要一个四元件透镜系统。本文描述了这种透镜系统的设计，重点介绍了每个组件的固有特性以及布局选择背后的逻辑。
