| ljwcdtj |
2012-05-17 12:02 |
求CODEV中MTF图线不能显示的原因
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。 ~T ]m>A!
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： r;/ 4F/6"
Warning: At least 3 focal positions are recommended for finding best focus xe#FUS
3
Warning: This system is not isoplanatic at field(s) 1, 2, 3, 4. A'j;\
`1
Any MTF results are of questionable value for assessing GS 0;bI4ay
the image quality, except in those cases where the user is CpA|4'#
interested only in the image of a point-like object. The =q>'19^Jx
image quality for the unacceptable fields varies significan- FemC Lvu
tly over a lateral region of 12 Airy disk diameters. CUO+9X-<8
Warning: The MTF results at one or more fields are inaccurate. VLS0XKI)
The mapping between entrance pupil coordinates and exit pupil coordinates 8
BY j
is nonlinear. The nature of the nonlinearity is such that Code V is not z8jk[5z
able to compute an accurate MTF result. Usually, this condition is ^$%S & W
caused by severe pupil distortion or some discontinuity in the pupil 2>|dF~"
coordinate mapping. In all cases where the pupil coordinate mapping VCu{&Sh*
has sufficient nonlinearity to cause this warning, the imagery is extremely ?i)f^O
nonstationary (non-isoplanatic) and small changes in object space $5 6Z#'(D
coordinates will cause large changes in the image of a point source. Fgk a jig
Error: The problem described here occurs at the following field(s): vqnw#U4`
Field: 1 Ao&\E cIOT
Field: 2 g'p K
Field: 3 VGfMN|h
Field: 4 @AK n@T5
ERROR - For field 4, wavelength 1, rays at the edge of the pupil c;%_EN%
may be ignored. Check apertures and vignetting for consistency. $"` - ^
这个究竟是什么问题呢？好像是和视场有关。求高人指点。
|
|