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2011-01-01 16:21 |
找到參考資料了。 .jRI
$vm :8S;34Y; From Smith, Modern Lens Design, 2nd ED, page 4 xU'z>y4V$ +'F;\E Are aspheric surfaces free of aberration? FgdnX2s J xd?=#d The conic aspherics (e.g., paraboloid, ellipsoid, hyperboloid, and the sphere) have !Uiq3s`1T no spherical aberration if the object point is at one focal point and the Va!G4_OT image is at the other. But if we depart from this condition we definitely (l5p_x do get spherical aberration. (Jp~=6&lKf
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