Synthetic diamond optical elements
US10012769B2 · kind B2 · utility
Inventors
Key dates
| Filing date | Mar 4, 2014 |
| Grant date | Jul 3, 2018 |
| Priority date | — |
| Expiry date | Dec 26, 2034 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B1/118
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An optical element comprising: synthetic diamond material; and an anti-reflective surface pattern formed directly in at least one surface of the synthetic diamond material, wherein the optical element has an absorption coefficient measured at room temperature of ≤0.5 cm−1 at a wavelength of 10.6 μm, wherein the optical element has a reflectance at said at least one surface of no more than 2% at an operating wavelength of the optical element, and wherein the optical element has a laser induced damage threshold meeting one or both of the following characteristics: the laser induced damage threshold is at least 30 Jcm−2 measured using a pulsed laser at a wavelength of 10.6 μm with a pulse duration of 100 ns and a pulse repetition frequency in a range 1 to 10 Hz; and the laser induced damage threshold is at least 1 MW/cm2 measured using a continuous wave laser at a wavelength of 10.6 μm.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.