Photo-driven light beam deflecting apparatus
US5202790A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 30, 1990 |
| Grant date | Apr 13, 1993 |
| Priority date | — |
| Expiry date | May 30, 2010 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02F1/293
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A photo-driven optical deflecting apparatus in which a light beam is deflected by using only light beam(s), comprising (a) a dielectric substrate having "photovoltaic effect"; (b) one or more first couples of electrodes formed in or on at least a portion of the surface(s) of said substrate so as to polarize the portion(s) positioned between said couple(s) of the electrodes formed thereby; (c) one or more photo-driving or photo-receiving elements provided at least in the polarized portion(s) of the surface of said dielectric substrate, having a polarization direction oriented in one direction, and having photovoltaic effect so as to generate a voltage between said electrodes; (d) a dielectric and transparent prism having "electrooptic effect" through which a light beam to be deflected is passed and deflected, provided on the surface of said substrate, having a second couple of electrodes provided on a couple of the surfaces of the prism, which surfaces are parallel to the optic axis; and a polarizer provided on the surface through which said beam enters; (d) leads electrically connecting said first electrodes to said second electrodes; the light beam to be deflected enters through s…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.