Glass lens with ion-exchanged antireflection coating and...

Details Glass lens with ion-exchanged antireflection coating and... Glass lens with ion-exchanged antireflection coating and...

G - Physics

02

B

88/115, 88/38, 1

G02B 1/10 (2006.01) C03C 17/34 (2006.01) C03C 21/00 (2006.01) G02C 7/02 (2006.01)

Patent

CA 1097965

ABSTRACT OF THE DISCLOSURE There is disclosed a glass ophthalmic lens including an ion-exchanged antireflection coating. Metal oxide films including TiO2, CeO2, ZrO2, La2O3, Nd2O3, Al2O3, and SiO2 when evaporated on glass lenses in a vacuum chamber by electron-beam techniques form hard optical coatings which are chemically stabile at high temperatures and allow potassium and sodium ions to traverse the thickness thereof without changing chemical composition or physical integrity thereby enhancing ability of glass lenses to be ion-exchanged in a conventional ion- exchange treatment. This allows antireflection coated glass lenses to pass impact-resistant standards ANZI Z80.1 for prescription ophthalmic lenses and USAS Z87.1 for safety lenses.

306151

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