Anti-reflection film for an optical element consisting of an org

Details Anti-reflection film for an optical element consisting of an org Anti-reflection film for an optical element consisting of an org

1989-01-23

1990-05-22

Arnold, Bruce Y.

350164, G02B 110

Patent

active

049272390

ABSTRACT:
An anti-reflection film for a clearly transparent optical element consisting of an organic material, for example an ophthalmic spectacle lens, is described. The anti-reflection film comprises a number of layers of which at least one consists of a metallic oxide. In one version of this invention, at least one layer consists of erbium oxide, terbium oxide, dysprosium oxide or holmium oxide. In another version of this invention, one layer consisting of samarium oxide, europium oxide, neodymium oxide or ytterbium oxide with a thickness of lambda/10 to lambda/20 is provided. In a third version of this invention, one layer consisting of yttrium oxide is deposited by evaporation on a layer of silicon dioxide, where the latter is deposited directly on the optical element consisting of an organic material.

REFERENCES:
patent: 3958042 (1976-05-01), Katsube et al.
patent: 4168113 (1979-09-01), Chang
patent: 4196246 (1980-04-01), Takayama et al.
patent: 4246043 (1981-01-01), Lindmayer
patent: 4313647 (1982-02-01), Takazawa
patent: 4387960 (1983-06-01), Tani
patent: 4609267 (1986-09-01), Deguchi et al.

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