找到參考資料了。 O&,8X-Ix
Udq!YXE0
From Smith, Modern Lens Design, 2nd ED, page 4 BvUiH<-D
n#@ Qd!uzM
Are aspheric surfaces free of aberration? m"QDc[^Ge
n~.$iN
The conic aspherics (e.g., paraboloid, ellipsoid, hyperboloid, and the sphere) have M=3gV?N
no spherical aberration if the object point is at one focal point and the aemi;61T\
image is at the other. But if we depart from this condition we definitely ck\W'Y*Q7
do get spherical aberration. `evF?t11X