找到參考資料了。 [B*x-R[FI
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From Smith, Modern Lens Design, 2nd ED, page 4 j;+b0(53
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Are aspheric surfaces free of aberration? hn7#
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The conic aspherics (e.g., paraboloid, ellipsoid, hyperboloid, and the sphere) have S:#lH?<_
no spherical aberration if the object point is at one focal point and the e9Wa<i8
image is at the other. But if we depart from this condition we definitely )Yh+c=6
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do get spherical aberration. i(rL|d+'