找到參考資料了。 A\})H
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From Smith, Modern Lens Design, 2nd ED, page 4 ~^J9v+
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Are aspheric surfaces free of aberration? "#8I &xZK
tkP& =$
The conic aspherics (e.g., paraboloid, ellipsoid, hyperboloid, and the sphere) have (7C$'T-ZK
no spherical aberration if the object point is at one focal point and the |)OC1=As
image is at the other. But if we depart from this condition we definitely cp&1yB
do get spherical aberration. b( ~#CHg