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2011-01-01 16:21 |
找到參考資料了。 hH HQmK<r
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From Smith, Modern Lens Design, 2nd ED, page 4 |c^ ?tR<
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Are aspheric surfaces free of aberration? F WA?mde
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The conic aspherics (e.g., paraboloid, ellipsoid, hyperboloid, and the sphere) have J\P6
no spherical aberration if the object point is at one focal point and the }B a_epM
image is at the other. But if we depart from this condition we definitely ?w+ V:D
do get spherical aberration. JQ 6M,O
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