Method, apparatus and adhesive composition for ophthalmic lens blocking
Number of patents in Portfolio can not be more than 2000
United States of America Patent
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Issued Date -
Jun 30, 2005
app pub date -
Feb 14, 2005
filing date -
Aug 31, 2001
priority date (Note) -
Abandoned
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Abstract
A method is provided for blocking a lens according to which a lens block is obtained which transmits UV and visible light. An adhesive curable by light within the UV and visible spectrum is applied between the lens blank and a lens mounting face of the lens block. The lens blank is placed adjacent the lens block with the adhesive extending therebetween. UV light is applied to cure the adhesive. The adhesive is selected to have a suitable low dimensional change on setting so as not to impart any undue stresses on the lens blank which being capable of total adhesive failure without lens damage or leaving a residue upon application of a suitable stripping force.
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