找到參考資料了。 -09<; U
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From Smith, Modern Lens Design, 2nd ED, page 4 -P.)
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Are aspheric surfaces free of aberration? J+.t\R
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The conic aspherics (e.g., paraboloid, ellipsoid, hyperboloid, and the sphere) have L G=Q
no spherical aberration if the object point is at one focal point and the vW]BOzK
image is at the other. But if we depart from this condition we definitely F6q}(+9i
do get spherical aberration. %mI`mpf