Pulsed illumination projector

Details Pulsed illumination projector Pulsed illumination projector

1984-11-19

1988-01-05

Boudreau, Leo H.

Electric lamp and discharge devices: systems

Pulsating or a.c. supply

3152415, 315307, 315271, 315247, 356438, 367 13, H05B 4116

Patent

active

047178620

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.

REFERENCES:
patent: 2936387 (1960-05-01), Steele et al.
patent: 4170747 (1979-10-01), Holmes
patent: 4187488 (1980-02-01), Anderson et al.
patent: 4225227 (1980-09-01), Seitz
patent: 4253046 (1981-02-01), Gerhard et al.
patent: 4464606 (1984-08-01), Kane
patent: 4498031 (1985-02-01), Stupp et al.
patent: 4499525 (1985-01-01), Mallory

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