找到參考資料了。 72} MspzUt
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From Smith, Modern Lens Design, 2nd ED, page 4 oQ@X}6B%S
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Are aspheric surfaces free of aberration? &ZFsK c#
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The conic aspherics (e.g., paraboloid, ellipsoid, hyperboloid, and the sphere) have }NDw3{zn
no spherical aberration if the object point is at one focal point and the +2`RvQN
image is at the other. But if we depart from this condition we definitely ihKnZcI$i
do get spherical aberration. hRSRz5 J}