多謝2L回復(fù),您指的應(yīng)該是這段吧 (]cL5o9
“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. R4 eu,,J
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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.” 4Lg
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我大概曉得了,多謝幫助!待我把您給的這篇看完,有問(wèn)題再來(lái)問(wèn):)