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。 m9md| yS
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：
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Warning: At least 3 focal positions are recommended for finding best focus kL S(w??T
Warning: This system is not isoplanatic at field(s) 1, 2, 3, 4. e# /kNHl
Any MTF results are of questionable value for assessing xAwf49N~
the image quality, except in those cases where the user is 8z<r.joxC
interested only in the image of a point-like object. The 3_`szl-
image quality for the unacceptable fields varies significan- -Z^4 L
tly over a lateral region of 12 Airy disk diameters. "Jy~PcJZ1
Warning: The MTF results at one or more fields are inaccurate. [<wbbvXR
The mapping between entrance pupil coordinates and exit pupil coordinates p8+/\Ee]B
is nonlinear. The nature of the nonlinearity is such that Code V is not O {k:yVb
able to compute an accurate MTF result. Usually, this condition is eX2<}'W<
caused by severe pupil distortion or some discontinuity in the pupil [ B0K
coordinate mapping. In all cases where the pupil coordinate mapping 15zrrU~D
has sufficient nonlinearity to cause this warning, the imagery is extremely !RlC~^
-
nonstationary (non-isoplanatic) and small changes in object space uO >x:*^8
coordinates will cause large changes in the image of a point source. @("}]/O
V:
Error: The problem described here occurs at the following field(s): On1v<SD$[
Field: 1 )~rB}>^Z
Field: 2 `BnP[jF
Field: 3 cX
A t :m
Field: 4 y1BgK>R
ERROR - For field 4, wavelength 1, rays at the edge of the pupil XNH4==4
may be ignored. Check apertures and vignetting for consistency. P` '$
这个究竟是什么问题呢？好像是和视场有关。求高人指点。
