找到參考資料了。 HGao} @'
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From Smith, Modern Lens Design, 2nd ED, page 4 ?!.L#]23f
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Are aspheric surfaces free of aberration? 782 oXyD
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The conic aspherics (e.g., paraboloid, ellipsoid, hyperboloid, and the sphere) have OI,F,4e
no spherical aberration if the object point is at one focal point and the s-4qK(ml-
image is at the other. But if we depart from this condition we definitely U6F7dT
do get spherical aberration. 2"QcjFW%