找到參考資料了。 D`o*OlU
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From Smith, Modern Lens Design, 2nd ED, page 4 %F3M\)jU
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Are aspheric surfaces free of aberration? l-Xxur5M'
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The conic aspherics (e.g., paraboloid, ellipsoid, hyperboloid, and the sphere) have pfe9n[
no spherical aberration if the object point is at one focal point and the LR@rn2Z
image is at the other. But if we depart from this condition we definitely PB.@G,)
do get spherical aberration. _SJ#k|vcq