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。 %9
3R/bx
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： EQWRfx?d
Warning: At least 3 focal positions are recommended for finding best focus 0u;a*#V @
Warning: This system is not isoplanatic at field(s) 1, 2, 3, 4. Sse%~:FL
Any MTF results are of questionable value for assessing Z9G4in8
the image quality, except in those cases where the user is {'Y()p3kl
interested only in the image of a point-like object. The ' 7M z]@
image quality for the unacceptable fields varies significan- tQ *?L
tly over a lateral region of 12 Airy disk diameters. c/7}5 #Rs
Warning: The MTF results at one or more fields are inaccurate. P{L S +.
The mapping between entrance pupil coordinates and exit pupil coordinates +Wl]1
c/
is nonlinear. The nature of the nonlinearity is such that Code V is not ) &DsRA7v
able to compute an accurate MTF result. Usually, this condition is 8J#x B
caused by severe pupil distortion or some discontinuity in the pupil p()q)P
coordinate mapping. In all cases where the pupil coordinate mapping * > /w,E]
has sufficient nonlinearity to cause this warning, the imagery is extremely ~:L5Ar<
nonstationary (non-isoplanatic) and small changes in object space @d5$OpL$%
coordinates will cause large changes in the image of a point source. xw}rFY $
Error: The problem described here occurs at the following field(s): -^)<FY\
Field: 1 2TG2<wqvE
Field: 2 mGDy3R90
Field: 3 Sp6==(:.
Field: 4 $Zr \$z2
ERROR - For field 4, wavelength 1, rays at the edge of the pupil 4{Q$^wD+.
may be ignored. Check apertures and vignetting for consistency. kbL7Xjk
这个究竟是什么问题呢？好像是和视场有关。求高人指点。
