找到參考資料了。 NFZ(*v1U
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From Smith, Modern Lens Design, 2nd ED, page 4 NBY|U{.g
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Are aspheric surfaces free of aberration? ~qrSHn}+PU
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The conic aspherics (e.g., paraboloid, ellipsoid, hyperboloid, and the sphere) have YE{ [f@i0
no spherical aberration if the object point is at one focal point and the fk5'v
image is at the other. But if we depart from this condition we definitely JEp)8{.bW8
do get spherical aberration. `a4&_`E,p