Electro-optic despeckling modulator and method of use
US6791739B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 8, 2001 |
| Grant date | Sep 14, 2004 |
| Priority date | — |
| Expiry date | Oct 27, 2021 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02F1/035
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A method of reducing the appearance of speckle resulting from a coherent light beam, includes the steps of: providing an electro-optic device having, an electro-optic substrate, an electrode array arranged on the surface of the electro-optic substrate, at least one electrode located on the opposite surface of the electro-optic substrate, and means for applying voltage to the electrodes to generate a variation in a refractive index profile within the substrate; and directing the light beam through the electro-optic device while applying voltage to the device, whereby the temporal and spatial phase of a light beam passing through the substrate is altered, thereby reducing the appearance of speckle.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.