找到參考資料了。 if+97^Oy
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From Smith, Modern Lens Design, 2nd ED, page 4 8q|T`ac+N
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Are aspheric surfaces free of aberration? #mRT>]di`D
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The conic aspherics (e.g., paraboloid, ellipsoid, hyperboloid, and the sphere) have ,veI'WHMB
no spherical aberration if the object point is at one focal point and the K^c%$n:}+
image is at the other. But if we depart from this condition we definitely Q\z9\mMG-
do get spherical aberration. Y58et9gRO