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2011-01-01 16:21 |
找到參考資料了。 W\(u1>lj
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From Smith, Modern Lens Design, 2nd ED, page 4 u!k]Q#2ZR
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Are aspheric surfaces free of aberration? a,o>E4#c
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The conic aspherics (e.g., paraboloid, ellipsoid, hyperboloid, and the sphere) have p*11aaIbp~
no spherical aberration if the object point is at one focal point and the 45Z"U<I,9
image is at the other. But if we depart from this condition we definitely r52X }Y
do get spherical aberration. ~c
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