找到參考資料了。 "f.Z}AbP
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From Smith, Modern Lens Design, 2nd ED, page 4 m:QG}{<.h
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Are aspheric surfaces free of aberration? 7E$&2U^Js
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The conic aspherics (e.g., paraboloid, ellipsoid, hyperboloid, and the sphere) have wucV_p.E
no spherical aberration if the object point is at one focal point and the )$%Z:
image is at the other. But if we depart from this condition we definitely Aj>[z8!,
do get spherical aberration. C@\{ehG