找到參考資料了。 <1K7@Tu
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From Smith, Modern Lens Design, 2nd ED, page 4 WtVf wC_
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Are aspheric surfaces free of aberration? oPsK:GC`U
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The conic aspherics (e.g., paraboloid, ellipsoid, hyperboloid, and the sphere) have Ev{MCu1!6
no spherical aberration if the object point is at one focal point and the (n,N8k;
image is at the other. But if we depart from this condition we definitely @y5= J`@=
do get spherical aberration. _$5@uL{n"^