找到參考資料了。 l!qhK'']V"
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From Smith, Modern Lens Design, 2nd ED, page 4 ZRHK?wg'#
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Are aspheric surfaces free of aberration? A{NKHn>%`
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The conic aspherics (e.g., paraboloid, ellipsoid, hyperboloid, and the sphere) have MkLXMwuQ&
no spherical aberration if the object point is at one focal point and the >8M=REn4
image is at the other. But if we depart from this condition we definitely sE:~+C6o:
do get spherical aberration. vxE#6