找到參考資料了。 }c:M^Ff
bpa?C
From Smith, Modern Lens Design, 2nd ED, page 4 j![\& z
z\4.Gm-
Are aspheric surfaces free of aberration? b%c9oR's^
>=w)x,0yX
The conic aspherics (e.g., paraboloid, ellipsoid, hyperboloid, and the sphere) have fI|$K)K
no spherical aberration if the object point is at one focal point and the .x&%HA
image is at the other. But if we depart from this condition we definitely K)iF>y|{*q
do get spherical aberration. a?oI>8*