A tri-focal diffractive lens defining three foci, for viewing a band of light having a
representative wavelength of λ, including a diffractive surface having a number of optical …

2 y tances or ranges, and a second diffractive structure, referred to as a multiorder diffractive
(MOD) structure, for diffract ing light at different wavelengths into a plurality of different …

A diffractive, multifocal ophthalmic lens including an apodization zone with echelettes
having a smoothly reduced step height to shift the energy balance from the near image to …

Diffractive lenses for vision correction are provided on a lens body having a first diffractive
structure for splitting light into two or more diffractive orders to different focal distances or …

(58) O li ss eas tesearchhi st profiles of the invention, often having subtlely shaped ee
appl1cauon Ille Ior complete searcn n1Story. echelettes with appropriately curving profiles …

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 …

A multifocal diffractive lens comprises a multifocal diffractive structure coupled to a refractive
component. The refractive component comprises at least one curved surface. The multifocal …

A multifocal diffractive lens comprises a multifocal diffractive structure coupled to a refractive
component. The refractive component comprises at least one curved surface. The multifocal …

The Cohen patent family on diffractive lenses encom passes in essence the following
patents: US Pat. No. 4,210,391; 4,338,005; 4,340,283; 5,054,905; 5,056,908; 5,117,306; …

A bifocal multiorder diffractive lens having a lens body with one or more first regions having
a first multiorder diffractive structure providing near vision correction, and one or more …