Is a
Patent attributes
Current Assignee
Patent Jurisdiction
Patent Number
Date of Patent
March 3, 2009
Patent Application Number
11391922
Date Filed
March 28, 2006
Patent Primary Examiner
Patent abstract
An autoclavable diagnostic ophthalmic lens system includes a biconvex lens element having front and rear surfaces and a housing in which the biconvex lens element is mounted. The biconvex lens element is fabricated from a glass having an index-of-refraction greater of 1.7 or greater. The glass composition meets the following parameters:(% SiO2 (by weight)+% B2O3) is less than 50%;% of alkali metal compounds+% of alkaline earth metal compounds is less than 10%; and(% SiO2+% B2O3)/(% rare earth compounds) is less than 1.
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