找到參考資料了。 V^S` d8?
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From Smith, Modern Lens Design, 2nd ED, page 4 0:C ^-zrx
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Are aspheric surfaces free of aberration? :o37 V!
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The conic aspherics (e.g., paraboloid, ellipsoid, hyperboloid, and the sphere) have K^6fg,&
no spherical aberration if the object point is at one focal point and the }c]u'a!4
image is at the other. But if we depart from this condition we definitely z5tOsU
do get spherical aberration. ]=ubl!0=: