Multifocal optical device

Details Multifocal optical device Multifocal optical device

G - Physics

02

C

3/112, 88/40, 88

G02C 7/06 (2006.01) A61F 2/16 (2006.01) G02B 5/18 (2006.01) G02C 7/04 (2006.01)

Patent

CA 1316727

NPD1701-1 Abstract of the Disclosure A diffractive multifocal optical element comprising a phase zone plate containing annular concentric zones in which the zones are spaced substantially proportional to Image , the zones possess stepped facets that introduce a discontinuity in optical path length of less than .lambda./2.

582736

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