找到參考資料了。 A)bWcB}U
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From Smith, Modern Lens Design, 2nd ED, page 4 [xSF6
)
i;1*jK
Are aspheric surfaces free of aberration? u+Y\6~=+
q]T1dz?
The conic aspherics (e.g., paraboloid, ellipsoid, hyperboloid, and the sphere) have r)y=lAyF>
no spherical aberration if the object point is at one focal point and the nV"~-On
image is at the other. But if we depart from this condition we definitely 3@kf@Vf
do get spherical aberration. ??^5;P{yx