找到參考資料了。 n'/w(o$&
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From Smith, Modern Lens Design, 2nd ED, page 4 dqMR<Nl&
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Are aspheric surfaces free of aberration? Lw=.LN
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The conic aspherics (e.g., paraboloid, ellipsoid, hyperboloid, and the sphere) have (89NK]2x
no spherical aberration if the object point is at one focal point and the b$sw`Rsw
image is at the other. But if we depart from this condition we definitely S9Fg0E+J
do get spherical aberration. bQ-5uFe~$B