Multiple contour diffractive lens

Optics: eye examining – vision testing and correcting – Spectacles and eyeglasses – Ophthalmic lenses or blanks

Patent

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Details

351161, G02C 704

Patent

active

051142201

ABSTRACT:
Disclosed is an ophthalmic lens which characteristically comprises at least two concentric regions having diffractive components with different phase profiles in order to use different orders of diffraction. The diffractive components may be formed by holograms in relief or index holograms.

REFERENCES:
patent: 4210391 (1980-07-01), Cohen
patent: 4637697 (1987-01-01), Freeman

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