找到參考資料了。 iau&k`b`
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From Smith, Modern Lens Design, 2nd ED, page 4 OR9){qP
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Are aspheric surfaces free of aberration? A~>=l=
`QF|>
N
The conic aspherics (e.g., paraboloid, ellipsoid, hyperboloid, and the sphere) have E=QQZ\w
no spherical aberration if the object point is at one focal point and the 'W*F[U*&HP
image is at the other. But if we depart from this condition we definitely zE/(F;> FV
do get spherical aberration. mTgn}rXk