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。 oKz! Xu%Hl
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： vmNI$ KZM
Warning: At least 3 focal positions are recommended for finding best focus JBc*m
Warning: This system is not isoplanatic at field(s) 1, 2, 3, 4. G{X7;j e
Any MTF results are of questionable value for assessing R87@.
the image quality, except in those cases where the user is U&*%KPy`
interested only in the image of a point-like object. The 5/ U {b5
image quality for the unacceptable fields varies significan- 5"b1 :
w@
tly over a lateral region of 12 Airy disk diameters. K@[Hej6d
Warning: The MTF results at one or more fields are inaccurate. +C7W2!I[G2
The mapping between entrance pupil coordinates and exit pupil coordinates lq3D!+ m
is nonlinear. The nature of the nonlinearity is such that Code V is not 7p!f+\kM
able to compute an accurate MTF result. Usually, this condition is CflyK @
caused by severe pupil distortion or some discontinuity in the pupil (4q/LuP^d
coordinate mapping. In all cases where the pupil coordinate mapping `mD !z.`U
has sufficient nonlinearity to cause this warning, the imagery is extremely 8"d??3ZXJ
nonstationary (non-isoplanatic) and small changes in object space se>\5k
coordinates will cause large changes in the image of a point source. vA6onYjA
Error: The problem described here occurs at the following field(s): -Mrt%1g
Field: 1 FaWc:GsfB
Field: 2 6)i>qz).
Field: 3 7 J6Z?
Field: 4 +CSv@ />3
ERROR - For field 4, wavelength 1, rays at the edge of the pupil Oop6o $k
may be ignored. Check apertures and vignetting for consistency. .C+(E@ey A
这个究竟是什么问题呢？好像是和视场有关。求高人指点。
