Electronically tuneable light source
US4456338A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jan 29, 1982 |
| Grant date | Jun 26, 1984 |
| Priority date | — |
| Expiry date | Jan 29, 2002 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02F1/11
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An electronically tuneable light source which includes a source of white light, an acousto-optic modulator which includes a transparent medium and a means for generating an acoustical wave in the medium and a means for directing the collimated beam of the white light onto the medium at a preselected angle .theta./2, to a line which is perpendicular to the direction of travel of the acoustical wave. Interaction of the light beam with the acoustical wave causes diffraction of the light beam. Means are provided for selecting a visible band of the diffracted beam at an angle to the incident collimated beam of light equal to approximately .theta..
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.