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US Patent 7646475 Device for automatically measuring characteristics of an ophthalmic lens

Patent 7646475 was granted and assigned to Essilor on January, 2010 by the United States Patent and Trademark Office.

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Current Assignee
Essilor
Essilor
Patent Jurisdiction
United States Patent and Trademark Office
United States Patent and Trademark Office
Patent Number
7646475
Patent Inventor Names
Fabien Divo0
Date of Patent
January 12, 2010
Patent Application Number
11667946
Date Filed
November 25, 2005
Patent Primary Examiner
‌
Tarifur Chowdhury
Patent abstract

A device for automatically measuring characteristics of an ophthalmic lens (L1), includes: a support (2) designed to receive such a lens; on one first side of the lens support, illuminating elements (208) including an optical system for producing a light beam directed towards the ophthalmic lens mounted on the support; and on a second side of the support, elements for analyzing (210) the image transmitted by the ophthalmic lens mounted on the support and illuminated by the illuminating elements (208); elements for splitting the light beam including a first mask (220) forming a Hartmann array and arranged on the first side of the lens support to be illuminated, upstream of the lens by the light beam.

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