找到參考資料了。 6h8fzqRzc
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From Smith, Modern Lens Design, 2nd ED, page 4 e[`u:
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Are aspheric surfaces free of aberration? e(t,~(
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The conic aspherics (e.g., paraboloid, ellipsoid, hyperboloid, and the sphere) have KNH.4A ,
no spherical aberration if the object point is at one focal point and the D`|.%
image is at the other. But if we depart from this condition we definitely SY: gr
do get spherical aberration. [ vWcQ6m