Multifocal diffractive lens

Details Multifocal diffractive lens Multifocal diffractive lens

G - Physics

02

C

88/41

G02C 7/06 (2006.01) G02B 5/18 (2006.01)

Patent

CA 1318800

FN 43303 CAN 2A Abstract of the Disclosure A multifocal ophthalmic lens has a plurality of concentric diffractive zones with adjacent zones separated by steps having predetermined heights. Each step has an outer corner and each outer corner has a radius of curvature equal to at least one half the height of the step associated therewith.

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