多谢2L回复,您指的应该是这段吧
,m-/R
“On axis, the spot is much smaller than the Airy Disk, while off axis the spot is much larger than the Airy Disk. This indicates the spot diagram is a useful and reasonable indicator of performance off axis only. To compute a more accurate PSF both on and off axis, a consideration of diffraction will be required. $rG~0
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Generally speaking, the spot diagram is useful if the aberrations are large compared to the diffraction limited performance of the system.” ') -Rv]xe
~Uz1()ftz
我大概晓得了,多谢帮助!待我把您给的这篇看完,有问题再来问:)