找到參考資料了。 L.IoGUxD
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From Smith, Modern Lens Design, 2nd ED, page 4 ~ F?G5cN5
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Are aspheric surfaces free of aberration? EU^}NZW&v:
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The conic aspherics (e.g., paraboloid, ellipsoid, hyperboloid, and the sphere) have +
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no spherical aberration if the object point is at one focal point and the F=
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image is at the other. But if we depart from this condition we definitely .y %pGi
do get spherical aberration. ^(dGO)/