Multichannel acousto-optic correlator for time delay computation
US5453835A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 7, 1994 |
| Grant date | Sep 26, 1995 |
| Priority date | — |
| Expiry date | Jul 7, 2014 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06E3/00
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A first signal acousto-optic (AO) cell together with a first signal source for injecting a first signal therein is disclosed along with a second AO cell together with a second signal source for injecting a second signal therein, to be correlated with the first signal. A first plus one diffracted order beam emerges from the first cell and is directed at a second cell to produce second and third plus one diffracted order beams which overlap and which produce an interference pattern that is focused on a photodetector array which determines the degree of correlation between the first and second signals. A Dove prism is employed between the cells to cause the second and third beams at the array to be counter-propagating and to control the spatial frequency of the interference pattern produced by these beams.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.