找到參考資料了。 a@d=>CT$
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From Smith, Modern Lens Design, 2nd ED, page 4 donw(_=
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Are aspheric surfaces free of aberration? v{x{=M]
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The conic aspherics (e.g., paraboloid, ellipsoid, hyperboloid, and the sphere) have xom<P+M!|
no spherical aberration if the object point is at one focal point and the 6X
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image is at the other. But if we depart from this condition we definitely wt}9B[
do get spherical aberration. g\A
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