Burkhard D G, Shealy D L, Strobel G L
University of Georgia, Department of Physics & Astronomy, Athens, Georgia 30602, USA.
Appl Opt. 1982 Oct 15;21(20):3713-8. doi: 10.1364/AO.21.003713.
The imaging effectiveness of an x-ray telescope consisting of a simple conical primary reflector and an aspheric secondary reflector is compared with a paraboloidal primary, hyperboloidal secondary of the same dimensions (Wolter type II). The rms spot size for the Wolter type II is considerably smaller being 1/28 as large as that of the cone-asphere for incident collimated light 1 min off the optical axis and 1/6 as large for incident light 12 min off the optical axis for a typical configuration. The cone-asphere spot size, on the other hand, is one half as large as that for a hyperboloidal primary, asphere secondary telescope of the same dimensions.
将由简单圆锥形主反射镜和非球面副反射镜组成的X射线望远镜的成像效果，与具有相同尺寸的抛物面主反射镜、双曲面副反射镜（沃尔特II型）进行了比较。对于典型配置，沃尔特II型的均方根光斑尺寸要小得多，对于偏离光轴1分钟的入射准直光，其大小仅为圆锥-非球面望远镜的1/28，对于偏离光轴12分钟的入射光，其大小为圆锥-非球面望远镜的1/6。另一方面，圆锥-非球面光斑尺寸是相同尺寸的双曲面主反射镜、非球面副反射镜望远镜光斑尺寸的一半。
