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。 wn[q?|1
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： [^B04x@
Warning: At least 3 focal positions are recommended for finding best focus X62h7?'Pd
Warning: This system is not isoplanatic at field(s) 1, 2, 3, 4. +] /_gz
Any MTF results are of questionable value for assessing |D
u.aN
the image quality, except in those cases where the user is |a #4
interested only in the image of a point-like object. The CRvUD.D
image quality for the unacceptable fields varies significan- _>B0q|]j4'
tly over a lateral region of 12 Airy disk diameters. EoqUFa,
Warning: The MTF results at one or more fields are inaccurate. uYAPGs#k
The mapping between entrance pupil coordinates and exit pupil coordinates Z[
} 0K3,5
is nonlinear. The nature of the nonlinearity is such that Code V is not wE:hl
able to compute an accurate MTF result. Usually, this condition is ` /JJ\`Pu
caused by severe pupil distortion or some discontinuity in the pupil pPm[<^\# S
coordinate mapping. In all cases where the pupil coordinate mapping MK 7S*N1
has sufficient nonlinearity to cause this warning, the imagery is extremely >(Jy=m?
nonstationary (non-isoplanatic) and small changes in object space ,2vPmff
coordinates will cause large changes in the image of a point source. >}h/$b U
Error: The problem described here occurs at the following field(s): CXGq>cQ=d
Field: 1 ] L4B
Field: 2
.Ya]N+r*
Field: 3 ^EE 3E'
Field: 4 O.e^? ysp/
ERROR - For field 4, wavelength 1, rays at the edge of the pupil 8'?V5.6?|~
may be ignored. Check apertures and vignetting for consistency. ? "\ `u;
这个究竟是什么问题呢？好像是和视场有关。求高人指点。
