Device for modulating light
US4054362A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Sep 10, 1975 |
| Grant date | Oct 18, 1977 |
| Priority date | — |
| Expiry date | Sep 10, 1995 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02F1/035
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A device for modulating light characterized by an electro-optical crystal which is either a solid crystal or a liquid crystal having an index of refraction greater than the index of refraction of the substrate on which the crystal is disposed and having a surface opposite the substrate covered with a dielectric material having an index of refraction less than the index of refraction of the crystal. A plurality of strip electrodes are disposed on the layer with adjacent electrodes connected to different terminals to form an interdigital electrode structure. When a modulating voltage is applied to the interdigital electrode structure, electrical fields are created between the electrode strips extending parallel to the direction of light propagation in the crystal to change the index of refraction to cause modulation of the light.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.