找到參考資料了。 '4HwS$mW3
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From Smith, Modern Lens Design, 2nd ED, page 4 #k)G1Y[c
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Are aspheric surfaces free of aberration? *KxV;H8/
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The conic aspherics (e.g., paraboloid, ellipsoid, hyperboloid, and the sphere) have .d8) *
no spherical aberration if the object point is at one focal point and the bL
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image is at the other. But if we depart from this condition we definitely `mw@"
do get spherical aberration. Ofqe+C