Method of marking plastic lenses
AssigneeBuckbee-Mears Company
InventorsDaniel L. Torgersen, Leon H. Fischer
Life of this patent
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Abstract
A method of marking plastic lenses to selectively identify a lens by impregnating a fluorescent material into the surface of the lens so that when the lens is exposed to ultraviolet light it fluoresces.
Claims6
The method of marking a polymer plastic lens having a polymer network comprising applying a fluorescent material to the surface of a plastic lens, allowing sufficient time to permit migration of the fluorescent material into the polymer network and then removing the excess fluorescent material on the surface of the lens.
The method of marking a polymer lens having a polymer network comprising selecting a fluorescent material selected from the group consisting of:
- alkylaminocoumarins, substituted diamines formed by reaction of p-diaminostilbenedisulfonic acid and cyanuric chloride, p-distyrylbiphenyls, naphthotriazolylstilbenes and 1,3-disubstituted pyrazolines;
- applying the fluorescent material, allowing sufficient time for the fluorescent material to penetrate into the polymer network and then removing the excess fluorescent material on the surface of the lens.
Dependencies are inferred from the claim text.