找到參考資料了。 .zl[nx[9"D
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From Smith, Modern Lens Design, 2nd ED, page 4 B'Jf&v
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Are aspheric surfaces free of aberration? #t;]s<
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The conic aspherics (e.g., paraboloid, ellipsoid, hyperboloid, and the sphere) have Rnoz[1y?0
no spherical aberration if the object point is at one focal point and the ;N(L,
image is at the other. But if we depart from this condition we definitely w;{Q)_A
do get spherical aberration. _3D9>8tzE7