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。 ;mlIW n
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： S`KCVQ>V
Warning: At least 3 focal positions are recommended for finding best focus Tyl"N{ _
Warning: This system is not isoplanatic at field(s) 1, 2, 3, 4. m/Z_ HER^
Any MTF results are of questionable value for assessing [.,6~=}vP
the image quality, except in those cases where the user is hZJqo + s
interested only in the image of a point-like object. The \M@8# k|
image quality for the unacceptable fields varies significan- e84TL U?~
tly over a lateral region of 12 Airy disk diameters. e[!>ezaIY
Warning: The MTF results at one or more fields are inaccurate. MEUqQ4/Gl
The mapping between entrance pupil coordinates and exit pupil coordinates AFED YRX
is nonlinear. The nature of the nonlinearity is such that Code V is not 6P| n eb}
able to compute an accurate MTF result. Usually, this condition is jXZNr
caused by severe pupil distortion or some discontinuity in the pupil $@wkQ%
coordinate mapping. In all cases where the pupil coordinate mapping [L^# <@S
has sufficient nonlinearity to cause this warning, the imagery is extremely _AHVMsz@
nonstationary (non-isoplanatic) and small changes in object space =1capix 1r
coordinates will cause large changes in the image of a point source. pC8i &_A
Error: The problem described here occurs at the following field(s): `_) dEu
Field: 1 !6C d.fpWL
Field: 2 i-b7
Field: 3 I),8EEf\
Field: 4 ZeZwzH)B D
ERROR - For field 4, wavelength 1, rays at the edge of the pupil _jz=BRO$
may be ignored. Check apertures and vignetting for consistency. . 5xM7,
这个究竟是什么问题呢？好像是和视场有关。求高人指点。
