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。 u0)~Im,X
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 Y_H|Fl^
Warning: This system is not isoplanatic at field(s) 1, 2, 3, 4. <K$X>&Ts
Any MTF results are of questionable value for assessing HR/"Nwr
the image quality, except in those cases where the user is :2qUel\PEC
interested only in the image of a point-like object. The ]Tb ?k+a
image quality for the unacceptable fields varies significan- @213KmB.
tly over a lateral region of 12 Airy disk diameters. @bc=O1vX~;
Warning: The MTF results at one or more fields are inaccurate. LV^V`m0#
The mapping between entrance pupil coordinates and exit pupil coordinates $[p<}o/6v]
is nonlinear. The nature of the nonlinearity is such that Code V is not 9q ##)
able to compute an accurate MTF result. Usually, this condition is M7\; Y
caused by severe pupil distortion or some discontinuity in the pupil @ 435K'!
coordinate mapping. In all cases where the pupil coordinate mapping C
Rd1zDB
has sufficient nonlinearity to cause this warning, the imagery is extremely A[/_}bI|
nonstationary (non-isoplanatic) and small changes in object space |\1! *Qp
coordinates will cause large changes in the image of a point source. ;oKN 8vI#7
Error: The problem described here occurs at the following field(s): Ly?%RmHK
Field: 1 +x7b9sHJ
Field: 2 y5td o'Ex
Field: 3 qh KW6v
Field: 4 5$v,%~$Xds
ERROR - For field 4, wavelength 1, rays at the edge of the pupil jLANv{"
may be ignored. Check apertures and vignetting for consistency. rRTAWAs%T
这个究竟是什么问题呢？好像是和视场有关。求高人指点。
