Patent · US Expired

Anti-reflection film for an optical element consisting of an organic material

US4927239A · kind A · utility

9Cited by

7References

4Claims

0Family size

Assignee

Optische Werke G. Rodenstock · DE

Inventors

Manfred Melzig · Weßling, DE
Horst Rosler · Weßling, DE
Medardus Schobl · Landsberied, DE

Key dates

Filing date	Jan 23, 1989
Grant date	May 22, 1990
Priority date	—
Expiry date	Jan 23, 2009

Classification

Technology area (CPC G)Physics
CPC primaryG02B1/115
WIPO fieldOptics
WIPO sectorInstruments

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.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.