找到參考資料了。 #fJ/KYJU
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From Smith, Modern Lens Design, 2nd ED, page 4 !7kAJG g
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Are aspheric surfaces free of aberration? ?CcR
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The conic aspherics (e.g., paraboloid, ellipsoid, hyperboloid, and the sphere) have ?,A}E|jZ
no spherical aberration if the object point is at one focal point and the D2hAlV)i(
image is at the other. But if we depart from this condition we definitely ~(Ih~/5\^
do get spherical aberration. 8=ukS_?Vy