找到參考資料了。 br>"96A1l
lzfaW-nu
From Smith, Modern Lens Design, 2nd ED, page 4 X|7gj&1
d"Hh9O}6
Are aspheric surfaces free of aberration? 7
\!t/<
W<xu*U(A
The conic aspherics (e.g., paraboloid, ellipsoid, hyperboloid, and the sphere) have G TNN4
no spherical aberration if the object point is at one focal point and the $dgY#ST%
image is at the other. But if we depart from this condition we definitely fZ]Y
do get spherical aberration. >"{3lDyq-