找到參考資料了。 8Au W>7_
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From Smith, Modern Lens Design, 2nd ED, page 4 g[\8s~g,
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Are aspheric surfaces free of aberration? fUOQ(BGp
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The conic aspherics (e.g., paraboloid, ellipsoid, hyperboloid, and the sphere) have @4Q/J$
no spherical aberration if the object point is at one focal point and the xqauSW
image is at the other. But if we depart from this condition we definitely -MORd{GF
do get spherical aberration. /J(~NGT