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1. (WO2013119775) METHOD AND APPARATUS FOR DETERMINING A THICKNESS PROFILE OF AN OPHTHALMIC LENS USING A SINGLE POINT THICKNESS AND REFRACTIVE INDEX MEASUREMENTS

Pub. No.:    WO/2013/119775    International Application No.:    PCT/US2013/025094
Publication Date: Fri Aug 16 01:59:59 CEST 2013 International Filing Date: Fri Feb 08 00:59:59 CET 2013
IPC: G01M 11/02
G02C 7/04
Applicants: JOHNSON & JOHNSON VISION CARE, INC.
Inventors: WIDMAN, Michael F.
AGARWAL, Naveen
WILDSMITH, Christopher
SITES, Peter W.
Title: METHOD AND APPARATUS FOR DETERMINING A THICKNESS PROFILE OF AN OPHTHALMIC LENS USING A SINGLE POINT THICKNESS AND REFRACTIVE INDEX MEASUREMENTS
Abstract:
This invention provides for a method and an ophthalmic lens thickness profile measuring apparatus. More specifically, the apparatus which is capable of measuring the ophthalmic lens in a precursor state after it is free-formed on an optic forming mandrel on which it can be formed. Additionally, the present invention can also allow for a design profile of the formed ophthalmic lens to be compared to the resulting free-formed ophthalmic lens to ensure it meets specified convergence design criteria.