Ophthalmic lens doublet for ophthalmoscopy

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United States of America Patent

PATENT NO 10327634
APP PUB NO 20190076019A1
SERIAL NO

15699469

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Abstract

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Proposed is an ophthalmic lens doublet for indirect ophthalmoscopy. The doublet is cemented into an integral unit from two lens elements, of which is a convex-convex lens element and another is a convex-concave lens element. Both lens elements have external and internal surfaces and may be combined so that the ophthalmic lens doublet has asphericity either on one side or on both sides of the unit. The aspheric surface is characterized by asphericity Z of the following formula (1)

description='In-line Formulae' end='lead'Z=Y2/{R+[R2−(1+k)Y2]1/2}  (1),description='In-line Formulae' end='tail'

where Z is in one of coordinates in a Cartesian coordinate system, Y is a second coordinate in the Cartesian coordinate system, R and k being variable parameters which are different for each selected values of d, where d is an outer diameter of the ophthalmic lens doublet.

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Farberov, Arkadiy Newark, US 7 161

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