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。 0|<ER3xkx
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: |7Fe~TC
Warning: At least 3 focal positions are recommended for finding best focus gBQK
Warning: This system is not isoplanatic at field(s) 1, 2, 3, 4. HvSKR1wL\
Any MTF results are of questionable value for assessing #9aB3C
the image quality, except in those cases where the user is FB{4& ;
interested only in the image of a point-like object. The T
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image quality for the unacceptable fields varies significan- a+!#cQl
tly over a lateral region of 12 Airy disk diameters. [)V&$~xW
Warning: The MTF results at one or more fields are inaccurate. dI'cZt~n
The mapping between entrance pupil coordinates and exit pupil coordinates qkB)CY7
is nonlinear. The nature of the nonlinearity is such that Code V is not ]O'dwC
able to compute an accurate MTF result. Usually, this condition is {2<A\nW
caused by severe pupil distortion or some discontinuity in the pupil
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coordinate mapping. In all cases where the pupil coordinate mapping o@TxDG
has sufficient nonlinearity to cause this warning, the imagery is extremely EgO=7?(pW
nonstationary (non-isoplanatic) and small changes in object space __HPwOCG7
coordinates will cause large changes in the image of a point source. rYUhGmg`
Error: The problem described here occurs at the following field(s): `6:;*#jO,
Field: 1 K7 >Z)21
Field: 2 <Z%iP{
Field: 3 ZS51QB
Field: 4 *sI`+4h[
ERROR - For field 4, wavelength 1, rays at the edge of the pupil C%8nr8po
may be ignored. Check apertures and vignetting for consistency. J
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这个究竟是什么问题呢?好像是和视场有关。求高人指点。