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。 :Q_<Z@2Y{
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： w1"nffhO
Warning: At least 3 focal positions are recommended for finding best focus oifv+oY
Warning: This system is not isoplanatic at field(s) 1, 2, 3, 4. okv 1K
Any MTF results are of questionable value for assessing :8+Ni d)
the image quality, except in those cases where the user is aKuSd3E@#
interested only in the image of a point-like object. The c 8>hc V
image quality for the unacceptable fields varies significan- q51Uf_\/
tly over a lateral region of 12 Airy disk diameters. *nsAgGKKM^
Warning: The MTF results at one or more fields are inaccurate. O1*NzY0Y%-
The mapping between entrance pupil coordinates and exit pupil coordinates QC;^xG+W
is nonlinear. The nature of the nonlinearity is such that Code V is not j;3[KLmuK%
able to compute an accurate MTF result. Usually, this condition is H&
Ca`B
caused by severe pupil distortion or some discontinuity in the pupil ugx%_x6
coordinate mapping. In all cases where the pupil coordinate mapping p >;_e(
has sufficient nonlinearity to cause this warning, the imagery is extremely $K'|0
nonstationary (non-isoplanatic) and small changes in object space Y=n4K<
coordinates will cause large changes in the image of a point source. /&{$ p M|?
Error: The problem described here occurs at the following field(s): $3uKw!z
Field: 1 xz{IH,?IG
Field: 2 $Gv9m
Field: 3 xD[Gq%
Field: 4 . ]7Qu;L
ERROR - For field 4, wavelength 1, rays at the edge of the pupil ?Ovqp-sw
may be ignored. Check apertures and vignetting for consistency. S'B|>!z@
这个究竟是什么问题呢？好像是和视场有关。求高人指点。
