小弟用CODEV设计了一个开普勒望远镜。目镜用的是对称式，物镜用了一个双胶合，视觉放大率为12。 CMU\DO
在目镜和物镜分别优化之后，将二者组合在一起时发现Quick 2D能正常显示，但是MTF图线无法显示，有报错，如下： 5N$O
Warning: At least 3 focal positions are recommended for finding best focus 6dKJt
Warning: This system is not isoplanatic at field(s) 1, 2, 3, 4. -x+K#T0Z
Any MTF results are of questionable value for assessing yX CJ?
the image quality, except in those cases where the user is 2(25IYMS8
interested only in the image of a point-like object. The g.COKA
image quality for the unacceptable fields varies significan- Ev,b5KelD
tly over a lateral region of 12 Airy disk diameters. &cT@MV5
Warning: The MTF results at one or more fields are inaccurate. n o7Q%O9
The mapping between entrance pupil coordinates and exit pupil coordinates C@rIyBj1g
is nonlinear. The nature of the nonlinearity is such that Code V is not \)2~o N
able to compute an accurate MTF result. Usually, this condition is sYd)r%%AU
caused by severe pupil distortion or some discontinuity in the pupil @c;:D`\p1C
coordinate mapping. In all cases where the pupil coordinate mapping B=|m._OL]n
has sufficient nonlinearity to cause this warning, the imagery is extremely oe{,-<yck
nonstationary (non-isoplanatic) and small changes in object space 07 7 wk
coordinates will cause large changes in the image of a point source. %dq |)r
Error: The problem described here occurs at the following field(s): :-e[$6}S
Field: 1 73kI%nNB
Field: 2 x k&# fW^r
Field: 3 8GT4U5c
;
Field: 4 A (ZtA[G
ERROR - For field 4, wavelength 1, rays at the edge of the pupil M6z$*? <
may be ignored. Check apertures and vignetting for consistency. h&<>nK
这个究竟是什么问题呢？好像是和视场有关。求高人指点。
