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2011-01-01 16:21 |
找到參考資料了。 [8>z#* B
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From Smith, Modern Lens Design, 2nd ED, page 4 2 \^G['9
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Are aspheric surfaces free of aberration? e^j<jV`1
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The conic aspherics (e.g., paraboloid, ellipsoid, hyperboloid, and the sphere) have WtEI] WO
no spherical aberration if the object point is at one focal point and the #SKfE
image is at the other. But if we depart from this condition we definitely sX +`wc
do get spherical aberration. ;Vg^!]LL#
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