找到參考資料了。 Xub*i^(]
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From Smith, Modern Lens Design, 2nd ED, page 4 VOJ/I Dl 4
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Are aspheric surfaces free of aberration? jF@BWPtF=
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The conic aspherics (e.g., paraboloid, ellipsoid, hyperboloid, and the sphere) have 43 vF(<r&f
no spherical aberration if the object point is at one focal point and the XV}}A^
image is at the other. But if we depart from this condition we definitely %8H$62w]
do get spherical aberration. 9W0*|!tQ,+