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。 "~ eF%}.
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： _';oT*#
Warning: At least 3 focal positions are recommended for finding best focus ~jn~M_}K
Warning: This system is not isoplanatic at field(s) 1, 2, 3, 4. dhmZ3 ~cW>
Any MTF results are of questionable value for assessing `_5{:
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the image quality, except in those cases where the user is ^Jdji:
interested only in the image of a point-like object. The N3QDPQ
image quality for the unacceptable fields varies significan- X) xeq
tly over a lateral region of 12 Airy disk diameters. u: s[6T0
Warning: The MTF results at one or more fields are inaccurate. d{G*1l(X
The mapping between entrance pupil coordinates and exit pupil coordinates I<^&~==
is nonlinear. The nature of the nonlinearity is such that Code V is not 0}iND$6@a
able to compute an accurate MTF result. Usually, this condition is "jMSF@lr
caused by severe pupil distortion or some discontinuity in the pupil gj-MkeI)
coordinate mapping. In all cases where the pupil coordinate mapping 1o%E(*M4I
has sufficient nonlinearity to cause this warning, the imagery is extremely a\?-uJ+
nonstationary (non-isoplanatic) and small changes in object space &3%V%_
coordinates will cause large changes in the image of a point source. "$rmy>d
Error: The problem described here occurs at the following field(s): wj#A#[e
Field: 1 LP- _i}Kq
Field: 2 E|l qlS7
Field: 3 pL ea 4
Field: 4 'n4$dv% q
ERROR - For field 4, wavelength 1, rays at the edge of the pupil TuX9:Q
may be ignored. Check apertures and vignetting for consistency. kKEs >a
这个究竟是什么问题呢？好像是和视场有关。求高人指点。
