找到參考資料了。 WFB|lNf&
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From Smith, Modern Lens Design, 2nd ED, page 4 }t
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Are aspheric surfaces free of aberration? gQd=0"MV
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The conic aspherics (e.g., paraboloid, ellipsoid, hyperboloid, and the sphere) have O;BMwg_7
no spherical aberration if the object point is at one focal point and the s.`%ZDl@Y
image is at the other. But if we depart from this condition we definitely *!]Epb
do get spherical aberration. ICCCCG*[