Multifokale ophthalmische Beugungslinsen
A multifocal ophthalmic lens has optical power, at least a portion of the optical power being produced by diffraction. The lens has a plurality of diffractive zones including a circular central zone and a plurality of concentric annular zones. The central zone has a radius r0 and the first annular z...
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Main Authors | , |
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Format | Patent |
Language | German |
Published |
06.10.1994
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Edition | 5 |
Subjects | |
Online Access | Get full text |
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Summary: | A multifocal ophthalmic lens has optical power, at least a portion of the optical power being produced by diffraction. The lens has a plurality of diffractive zones including a circular central zone and a plurality of concentric annular zones. The central zone has a radius r0 and the first annular zone has a radius r1 where r1 - r0 is not equal to r0 . |
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Bibliography: | Application Number: DE19896014015T |