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2011-01-01 16:21 |
找到參考資料了。 IZs& 7
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From Smith, Modern Lens Design, 2nd ED, page 4 <Yg6=e
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Are aspheric surfaces free of aberration? a[p$e?gka
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The conic aspherics (e.g., paraboloid, ellipsoid, hyperboloid, and the sphere) have MV] `[^xQ5
no spherical aberration if the object point is at one focal point and the Xyjd7 "
image is at the other. But if we depart from this condition we definitely #4<=Ira5
do get spherical aberration. $gZ iW 8
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