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2011-01-01 16:21 |
找到參考資料了。 {
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From Smith, Modern Lens Design, 2nd ED, page 4 <a$'tw-8
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Are aspheric surfaces free of aberration? %0^taA
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The conic aspherics (e.g., paraboloid, ellipsoid, hyperboloid, and the sphere) have xrC b29{
no spherical aberration if the object point is at one focal point and the P{h$> 6c
image is at the other. But if we depart from this condition we definitely 5R"(4a P
do get spherical aberration. g{$F;qbkO
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