Method and device for high resolution acousto-optic programmable filtering in the infrared region
US7944607B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Sep 24, 2008 |
| Grant date | May 17, 2011 |
| Priority date | — |
| Expiry date | Sep 24, 2028 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02F1/116
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
The subject matter of the invention is a method of high-resolution acousto-optic programmable filtering in the infrared region of an incident optical wave. To that end it proposes the use of a birefringent acousto-optic crystal whereof the propagation speed of acoustic waves is slow, such as compounds of mercury, which acousto-optic crystal comprises, on one of its faces, a piezoelectric transducer designed to generate a transverse acoustic wave with wave vector whereof the energy propagates according to the same axis but in the opposite direction to the energy of the incident optical wave, knowing that the optical wave resulting from the acousto-optic interaction between the incident optical wave and the acoustic wave with wave vector is diffracted perpendicularly or almost perpendicularly to the direction of the incident optical wave.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.