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2012-05-17 12:02 |
求CODEV中MTF圖線(xiàn)不能顯示的原因
小弟用CODEV設(shè)計(jì)了一個(gè)開(kāi)普勒望遠(yuǎn)鏡。目鏡用的是對(duì)稱(chēng)式，物鏡用了一個(gè)雙膠合，視覺(jué)放大率為12。 p$a+?5'Q
在目鏡和物鏡分別優(yōu)化之后，將二者組合在一起時(shí)發(fā)現(xiàn)Quick 2D能正常顯示，但是MTF圖線(xiàn)無(wú)法顯示，有報(bào)錯(cuò)，如下： 7$Lt5rn"}
Warning: At least 3 focal positions are recommended for finding best focus SyI i*dH
Warning: This system is not isoplanatic at field(s) 1, 2, 3, 4. W$:D#;jz`h
Any MTF results are of questionable value for assessing L
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the image quality, except in those cases where the user is Tfw5i,{
interested only in the image of a point-like object. The p d .5
image quality for the unacceptable fields varies significan- aEdc8i ?
tly over a lateral region of 12 Airy disk diameters.
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Warning: The MTF results at one or more fields are inaccurate. AA[?a
The mapping between entrance pupil coordinates and exit pupil coordinates p+16*f9,^
is nonlinear. The nature of the nonlinearity is such that Code V is not <=@6UPsn2
able to compute an accurate MTF result. Usually, this condition is % S<))G
caused by severe pupil distortion or some discontinuity in the pupil =H?^G[
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