Pulsed illumination projector
US4717862A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Nov 19, 1984 |
| Grant date | Jan 5, 1988 |
| Priority date | — |
| Expiry date | Nov 19, 2004 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH05B39/09
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A pulsed illuminator projector for reducing the reverberation levels of rected ligh by illuminating a lamp that is pulsed on and off at a specified rate and for a specified time duration. The critical factor is controlling the amount of time the light is on versus amount of time it is off, and the frequency at which the lamp is pulsed on. The pulsed illumination projector device reduces the amount of backscatter from particulate matter such as water, zooplankton, dust, fog and the like which causes a significant amount of light to reflect back toward the source thereby reducing visibility. Backscatter is reduced through the reduction of direct incident light. As the backscatter is reduced, the distance which objects can be detected is increased. Illumination is controlled directly by pulse length and repetition rate. The device is completely portable and can be hand held item as well as mounted on a vehicle and operable in gaseous or liquid atmospheres.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.