Optics: eye examining – vision testing and correcting – Spectacles and eyeglasses – Ophthalmic lenses or blanks
Patent
1977-11-10
1980-03-25
Corbin, John K.
Optics: eye examining, vision testing and correcting
Spectacles and eyeglasses
Ophthalmic lenses or blanks
346 76L, 351160H, 358297, G02C 704
Patent
active
041948149
ABSTRACT:
Indicia are formed in the surface of an ophthalmic contact lens by sublimating lens material with a high intensity beam of radiation. A beam of light from a laser is directed through one or more cooperating masks having openings defining desired indicia. The light which passes through the masks is directed upon a surface of a contact lens, advantageously near the periphery thereof. By selecting a proper wavelength and controlling the amount of energy directed upon the lens surface the depth of sublimation of lens material can be controlled. In this manner symbols can be formed upon the lens for uniquely identifying it.
REFERENCES:
patent: T903014 (1972-10-01), Dempski
patent: 1475473 (1923-11-01), Drescher
patent: 3440388 (1969-04-01), Otstot et al.
patent: 3549733 (1970-12-01), Caddell
patent: 3657085 (1972-04-01), Hoffmeister et al.
patent: 3833786 (1974-09-01), Brucker
patent: 4039827 (1977-08-01), Zdrok et al.
Carco, Inc., Sales Brochure, Laser Marking Division of Carco, Inc., Detroit, Mich., Aug. 1976.
Harris et al., "Laser Etching Arrangement," IBM Technical Disclosure Bulletin, vol. 10, No. 1, (Jun. 1967), p. 63.
Neill, "Electronic Venting of Corneal Contact Lenses," Contacto, vol. 11, No. 2, Jun. 1967, pp. 9-11.
Fischer David J.
Hager James D.
McCandless James A.
Bausch & Lomb Incorporated
Corbin John K.
Lyons Ronald L.
Parker Frank C.
Sugarman Scott J.
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