找到參考資料了。 `ReGnT[
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From Smith, Modern Lens Design, 2nd ED, page 4 Xout:dn
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Are aspheric surfaces free of aberration? ]~'9
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The conic aspherics (e.g., paraboloid, ellipsoid, hyperboloid, and the sphere) have , !r@9T
no spherical aberration if the object point is at one focal point and the }a'cm!"
image is at the other. But if we depart from this condition we definitely w"BIv9N
do get spherical aberration. 9@Q&B+!