找到參考資料了。 z&6_}{2,]
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From Smith, Modern Lens Design, 2nd ED, page 4 l~i?
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Are aspheric surfaces free of aberration? AS7L
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The conic aspherics (e.g., paraboloid, ellipsoid, hyperboloid, and the sphere) have Q;]JVT1
no spherical aberration if the object point is at one focal point and the 3`bQ0-D;
image is at the other. But if we depart from this condition we definitely $aV62uNf
do get spherical aberration. pF{jIXu