Method for trimming a pre-coated ophthalmic eyeglass lens
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United States of America Patent
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Sep 20, 2016
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N/A
app pub date -
Jul 1, 2011
filing date -
Jul 13, 2010
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Abstract
Method of shaping an ophthalmic eyeglass lens presenting two main optical working faces and including firstly a substrate made of a first material and presenting two main faces corresponding to the two main faces of the lens, and secondly at least one coating film made of a material distinct from that of the substrate, the coating film being previously secured on at least one of the main faces of the substrate, includes:
- cutting the lens by machining with a first tool over at least the thickness of the previously secured coating film, to define internally a working central portion of the coating film that presents a reduced outline;trimming the edge face of the substrate along the desired outline by machining with a second distinct tool, without machining the working central portion; andfinishing the edge face of the substrate without machining the working central portion.
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