找到參考資料了。 FITaL@{c
~+iJpW
From Smith, Modern Lens Design, 2nd ED, page 4 $`dNl#G,
F`V[G(f+r
Are aspheric surfaces free of aberration? l3#dfW{
-/2$P
The conic aspherics (e.g., paraboloid, ellipsoid, hyperboloid, and the sphere) have X*yp=qI
no spherical aberration if the object point is at one focal point and the %oKqK>S)
image is at the other. But if we depart from this condition we definitely }
9s
do get spherical aberration. [qMO7enu#