Optics: eye examining – vision testing and correcting – Spectacles and eyeglasses – Ophthalmic lenses or blanks
Patent
1990-03-28
1992-06-23
Sugarman, Scott J.
Optics: eye examining, vision testing and correcting
Spectacles and eyeglasses
Ophthalmic lenses or blanks
351 41, 351159, 359666, G02C 706, G02B 314
Patent
active
051247348
ABSTRACT:
An ophthalmic lens that includes a construction that provides a static grading or some other means that yields a nonuniform power function which depends on the surface of the lens. The lens also includes a selectively operable element that effects a dynamic change in the power of the lens which is a uniform or nonuniform function of the location point on the lens. The actual power of any point on the lens is then the super position of the power due to static grating and the power due to the selectively operable element. The proper design of each power function facilitates ophthalmic lenses that are suitable and optimized for special applications as well as for general purpose usage.
REFERENCES:
patent: 2576581 (1951-11-01), Edwards
patent: 2836101 (1958-05-01), Deswart
patent: 3161718 (1964-12-01), De Luca
patent: 3493290 (1970-02-01), Traub
patent: 3598479 (1971-08-01), Wright
patent: 4261655 (1981-04-01), Honigsbaum
patent: 4418990 (1983-12-01), Gerber
patent: 4913536 (1990-04-01), Barnea
Graham, R.; "A Variable Focus Lens and It's Uses"; Journal of the Optical Society of America; vol. 30; Nov. 1940; pp. 560-563.
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