小弟用CODEV設(shè)計了一個開普勒望遠(yuǎn)鏡。目鏡用的是對稱式，物鏡用了一個雙膠合，視覺放大率為12。 V vth,
在目鏡和物鏡分別優(yōu)化之后，將二者組合在一起時發(fā)現(xiàn)Quick 2D能正常顯示，但是MTF圖線無法顯示，有報錯，如下： *^BW[C/CTR
Warning: At least 3 focal positions are recommended for finding best focus ]x8_f6;D
Warning: This system is not isoplanatic at field(s) 1, 2, 3, 4. FS3MR9
Any MTF results are of questionable value for assessing A`= ;yD
the image quality, except in those cases where the user is uCc.dluU
interested only in the image of a point-like object. The c +6/@y
image quality for the unacceptable fields varies significan- CQf<En|1
tly over a lateral region of 12 Airy disk diameters. n{>Ge,enP0
Warning: The MTF results at one or more fields are inaccurate. m;=wQYFr{I
The mapping between entrance pupil coordinates and exit pupil coordinates X q3n7d.
is nonlinear. The nature of the nonlinearity is such that Code V is not Ywj=6 + ;
able to compute an accurate MTF result. Usually, this condition is b`NXe7 A
caused by severe pupil distortion or some discontinuity in the pupil hX-([o
coordinate mapping. In all cases where the pupil coordinate mapping DCJmk6 p%0
has sufficient nonlinearity to cause this warning, the imagery is extremely z (N3oBW
nonstationary (non-isoplanatic) and small changes in object space HF9\SVR
B
coordinates will cause large changes in the image of a point source. hSxlj7Eo^T
Error: The problem described here occurs at the following field(s): !]%M
Field: 1 U>q&p}z0 H
Field: 2 \m.ap+dFa
Field: 3 S?X2MX
Field: 4 }Pm>mQZ},
ERROR - For field 4, wavelength 1, rays at the edge of the pupil ZS&n,<a5L}
may be ignored. Check apertures and vignetting for consistency. g/)$-Z)Nu
這個究竟是什么問題呢？好像是和視場有關(guān)。求高人指點(diǎn)。
