Laminar fresnel reduced ophthalmic lens construction

Details Laminar fresnel reduced ophthalmic lens construction Laminar fresnel reduced ophthalmic lens construction

1976-03-05

1978-01-24

Sacher, Paul A.

Optics: eye examining, vision testing and correcting

Spectacles and eyeglasses

Ophthalmic lenses or blanks

351172, G02C 702

Patent

active

040701050

ABSTRACT:
A multi-element ophthalmic lens construction is disclosed wherein a plurality of two element lens pairs are bonded together to form an ophthalmic lens. Each pair forming a combination has internally mating, Fresnel reduced, corrector shapes. However, each element of the pair has a different index of refraction whereby each lens pair achieves a desired power.

REFERENCES:
patent: 1948636 (1934-02-01), Tillyer
patent: 2077092 (1937-04-01), Broder
patent: 3182576 (1965-05-01), Papke
patent: 3628854 (1971-12-01), Jampolsky
patent: 3735685 (1973-05-01), Plummer
patent: 3809461 (1974-05-01), Baumgardner et al.
patent: 3827798 (1974-08-01), Alvarez
patent: 3877798 (1975-04-01), Tolar et al.

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