Sasïse M, Rousselet K, Lazarides E
Appl Opt. 1995 May 1;34(13):2278-83. doi: 10.1364/AO.34.002278.
Images from the Hubble Space Telescope suffer from an overcorrected spherical aberration that is due to a conic-constant error in the primary mirror. Within the program known as the corrective optics space telescope axial replacement (COSTAR) simulators have been built to provide the point-spread function (PSF) of the telescope alone and of the telescope with the faint-object camera F/96. It was found that the experimental PSF's were identical to those in orbit, which was not the case when the PSF's were calculated with commonly used optical software. We explain this discrepancy and propose a modeling method that is based on the determination of the wave-front error at the exit-pupil level that gives results that are consistent with observations.
哈勃太空望远镜的图像存在过校正球差，这是由主镜的二次常数误差所致。在“矫正光学太空望远镜轴向替换”（COSTAR）项目中，已构建模拟器以提供望远镜自身以及配备暗天体相机F/96的望远镜的点扩散函数（PSF）。结果发现，实验性PSF与轨道上的PSF相同，而使用常用光学软件计算PSF时情况并非如此。我们解释了这种差异，并提出了一种基于确定出瞳处波前误差的建模方法，该方法得出的结果与观测结果一致。
