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。 f3tv3>p
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： kB
P *K
Warning: At least 3 focal positions are recommended for finding best focus ${hz e<g
Warning: This system is not isoplanatic at field(s) 1, 2, 3, 4. Tg
?x3?kw
Any MTF results are of questionable value for assessing Vpp& |n9^
the image quality, except in those cases where the user is m~` >`4
interested only in the image of a point-like object. The , mFsM!|
image quality for the unacceptable fields varies significan- -1r2 K
tly over a lateral region of 12 Airy disk diameters. >-)h|w i
Warning: The MTF results at one or more fields are inaccurate. AuiFbRFi
The mapping between entrance pupil coordinates and exit pupil coordinates x?yD=Mq_
is nonlinear. The nature of the nonlinearity is such that Code V is not K_BPZ5 w
able to compute an accurate MTF result. Usually, this condition is 7Z,/g|s}z
caused by severe pupil distortion or some discontinuity in the pupil !Pj/7JC0
coordinate mapping. In all cases where the pupil coordinate mapping =
+Xc4a
has sufficient nonlinearity to cause this warning, the imagery is extremely XcfKx@l
nonstationary (non-isoplanatic) and small changes in object space SUtf[6
coordinates will cause large changes in the image of a point source. rOfK~g,X
Error: The problem described here occurs at the following field(s): W WG /k17
Field: 1 q6q1\YB
Field: 2 Y}STF
Field: 3 u{f*
M,k
Field: 4 8im@4A +n`
ERROR - For field 4, wavelength 1, rays at the edge of the pupil wts:65~
may be ignored. Check apertures and vignetting for consistency. C Ac
%f9!3
这个究竟是什么问题呢？好像是和视场有关。求高人指点。
