找到參考資料了。 MDU#V
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From Smith, Modern Lens Design, 2nd ED, page 4 tqZ+2c<W3
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Are aspheric surfaces free of aberration? )63
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The conic aspherics (e.g., paraboloid, ellipsoid, hyperboloid, and the sphere) have <;6{R#Tuh
no spherical aberration if the object point is at one focal point and the pA6KiY&
image is at the other. But if we depart from this condition we definitely eHuJFM
do get spherical aberration. ]7O<|8n!d