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。 W&&C[@Jd3
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： yv$hI U2X
Warning: At least 3 focal positions are recommended for finding best focus 7--E$ !9O,
Warning: This system is not isoplanatic at field(s) 1, 2, 3, 4. g12.4+
Any MTF results are of questionable value for assessing @?t+O'&
the image quality, except in those cases where the user is tS,AS,vy]
interested only in the image of a point-like object. The =%b1EY k
image quality for the unacceptable fields varies significan- N4WX}
tly over a lateral region of 12 Airy disk diameters. (Q.I DDlr
Warning: The MTF results at one or more fields are inaccurate. ]l
The mapping between entrance pupil coordinates and exit pupil coordinates 5 <7sVd.
is nonlinear. The nature of the nonlinearity is such that Code V is not %Bg>=C)^(1
able to compute an accurate MTF result. Usually, this condition is S*WLb/R2
caused by severe pupil distortion or some discontinuity in the pupil h +9~^<oFl
coordinate mapping. In all cases where the pupil coordinate mapping Rgz zbW
has sufficient nonlinearity to cause this warning, the imagery is extremely &uf|Le4
nonstationary (non-isoplanatic) and small changes in object space h6 ;zAM}
coordinates will cause large changes in the image of a point source. sAF= "u B
Error: The problem described here occurs at the following field(s): )k4&S{ =
Field: 1 |HwEwL+
Field: 2 [X@JH6U
r
Field: 3 LvL2[xh%&
Field: 4 71\GK
ERROR - For field 4, wavelength 1, rays at the edge of the pupil 6O*lZNN
may be ignored. Check apertures and vignetting for consistency. MK!Aq^Jz
这个究竟是什么问题呢？好像是和视场有关。求高人指点。
