找到參考資料了。 >NV=LOO
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From Smith, Modern Lens Design, 2nd ED, page 4 p$;I'
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Are aspheric surfaces free of aberration? A\te*G0:S
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The conic aspherics (e.g., paraboloid, ellipsoid, hyperboloid, and the sphere) have 6g>)6ux>aV
no spherical aberration if the object point is at one focal point and the VF0dE
image is at the other. But if we depart from this condition we definitely !NKmx=I]
do get spherical aberration. `"k9wC1