找到參考資料了。 "%O,*t
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From Smith, Modern Lens Design, 2nd ED, page 4 9N(<OY+Dgm
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Are aspheric surfaces free of aberration? s:
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The conic aspherics (e.g., paraboloid, ellipsoid, hyperboloid, and the sphere) have fH_G;#q
no spherical aberration if the object point is at one focal point and the M8Y\1#~
image is at the other. But if we depart from this condition we definitely \cq
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do get spherical aberration. B_FfXFQm<