找到參考資料了。 \!]Zq#*kH
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From Smith, Modern Lens Design, 2nd ED, page 4 ZRD@8'1p
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Are aspheric surfaces free of aberration? ,(D:cRN
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The conic aspherics (e.g., paraboloid, ellipsoid, hyperboloid, and the sphere) have MDyPwv\
no spherical aberration if the object point is at one focal point and the P
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image is at the other. But if we depart from this condition we definitely +!'rwD
do get spherical aberration. D>HX1LV