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2011-01-01 16:21 |
找到參考資料了。 h,14 0pW
G:WMocyXI'
From Smith, Modern Lens Design, 2nd ED, page 4 e,~c~Db*
Q
y13=y}dyDH
Are aspheric surfaces free of aberration? |,sUD/rt
Y[s
The conic aspherics (e.g., paraboloid, ellipsoid, hyperboloid, and the sphere) have nZ\,ZqV
no spherical aberration if the object point is at one focal point and the 5\=9&{WjND
image is at the other. But if we depart from this condition we definitely i'e^[oZ
do get spherical aberration. N%r}0
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