多谢2L回复,您指的应该是这段吧 x\s,= n3z
“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. |DF9cd^
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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.” 'z=:[#b
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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:)