| ljwcdtj |
2012-05-17 12:02 |
求CODEV中MTF圖線不能顯示的原因
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)稱式，物鏡用了一個(gè)雙膠合，視覺(jué)放大率為12。 vx /NG$
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圖線無(wú)法顯示，有報(bào)錯(cuò)，如下： |T0jq
Warning: At least 3 focal positions are recommended for finding best focus ;QQLY T
Warning: This system is not isoplanatic at field(s) 1, 2, 3, 4. e*.l6H/B
Any MTF results are of questionable value for assessing ,[ &@?
the image quality, except in those cases where the user is 8C3oj
interested only in the image of a point-like object. The I5PI;t +
image quality for the unacceptable fields varies significan- &=y)C/u
tly over a lateral region of 12 Airy disk diameters. =m6;]16 D
Warning: The MTF results at one or more fields are inaccurate. E c[-@5x
The mapping between entrance pupil coordinates and exit pupil coordinates 4%
)I[-sH
is nonlinear. The nature of the nonlinearity is such that Code V is not h-<2N)>!
able to compute an accurate MTF result. Usually, this condition is 8?AFvua}r
caused by severe pupil distortion or some discontinuity in the pupil ?bu-6pkx]
coordinate mapping. In all cases where the pupil coordinate mapping B B*]" gT
has sufficient nonlinearity to cause this warning, the imagery is extremely Ad DlS~\?
nonstationary (non-isoplanatic) and small changes in object space F1%-IBe
coordinates will cause large changes in the image of a point source. oH H-joYnn
Error: The problem described here occurs at the following field(s): ;:N W
Field: 1 ;LM`B^Q]s
Field: 2 WrBiAh ,
Field: 3 l1XA9>n
Field: 4 =NxT9$V
ERROR - For field 4, wavelength 1, rays at the edge of the pupil oZTKG'
may be ignored. Check apertures and vignetting for consistency. r=l hYn
這個(gè)究竟是什么問(wèn)題呢？好像是和視場(chǎng)有關(guān)。求高人指點(diǎn)。
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