找到參考資料了。 ;-84cpfu
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From Smith, Modern Lens Design, 2nd ED, page 4 "o#N6Qu71
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Are aspheric surfaces free of aberration? *UVjN_na5
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The conic aspherics (e.g., paraboloid, ellipsoid, hyperboloid, and the sphere) have *8k`m)h26
no spherical aberration if the object point is at one focal point and the JtYc'%OF
image is at the other. But if we depart from this condition we definitely Yh/-6wg
do get spherical aberration. !fdni}f)
