Optics: eye examining – vision testing and correcting – Spectacles and eyeglasses – Ophthalmic lenses or blanks
Patent
1987-05-20
1989-08-15
Arnold, Bruce Y.
Optics: eye examining, vision testing and correcting
Spectacles and eyeglasses
Ophthalmic lenses or blanks
350413, 350432, 351176, 351177, G02C 702, G02
Patent
active
048568899
ABSTRACT:
A uniform strength ophthalmic lens having a gradient refractive index changing rotational-symmetrically about the optical axis in which the curvature course of at least one of the two surfaces of the ophthalmic lens is selected without consideration of correction of aberration so that the critical thickness of the ophthalmic lens does not exceed a specific value and that the gradient refractive index is change rotational-symmetrically about the optical axis so as to correct the aberration. In this manner, a significant reduction of the critical thickness of the opthalmic lens, i.e., the center thickness is a positive lens and peripheral thickness in a negative lens, is achieved while providing an ophthalmic lens having good image-forming properties.
REFERENCES:
patent: 3486808 (1969-12-01), Hamblen
patent: 3718383 (1973-02-01), Moore
Charman, W. N.; "Gradient Index Optics"; The Ophthalmic Optician; Jan. 31, 1981; pp. 72-84.
Guilino Gunther
Pfeiffer Herbert
Arnold Bruce Y.
Optische Werke G. Rodenstock
Sugarman Scott J.
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