Anti-reflection coatings and associated methods
US6589657B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Aug 31, 2001 |
| Grant date | Jul 8, 2003 |
| Priority date | — |
| Expiry date | Aug 31, 2021 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B1/16
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An optical coating and a method of coating a substrate are provided. A first layer is deposited adjacent to a substrate. The first layer has an optical thickness of about 0.27 &lgr;0 to about 0.31 &lgr;0, where &lgr;0 is a reference wavelength corresponding to a spectral region bound by or in the visible spectrum. A second layer having an optical thickness of about 0.1 &lgr;0 to about 0.125 &lgr;0 and a refractive index from about 2.2 to about 2.6 is deposited. A third layer having a refractive index from about 1.46 to about 1.52 is deposited. The optical coating provides broadband anti-reflection performance, and the thin second layer facilitates high throughput production of the optical coating.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.