Accession Number:

ADD019920

Title:

Underwater Strobe Light Control Circuitry

Descriptive Note:

Patent Application, Filed 28 Apr 2000

Corporate Author:

DEPARTMENT OF THE NAVY WASHINGTON DC

Report Date:

2000-04-28

Pagination or Media Count:

22.0

Abstract:

A device for controlling a strobe light in underwater high speed photography in a first aspect includes a plurality of spaced break screen or sense coil members, a projectile for launch through the series of break screen or sense coil members, a camera having a shutter opened at a predetermined Liming prior to release of the projectile and closing at a predetermined timing subsequent to release of the projectile, and a strobe light opposed to the camera for illumination at a time when the projectile passes in front of the camera. A trigger device, such as a break screen or sense coil, is positioned immediately up-range of the camera. With a tire delay programmed into a Programmable Array Logic PAL, a control circuit receives the trigger information and creates a timed signal to control the illumination of the strobe light. In accordance with another aspect of this invention, the control circuitry includes discrete logic devices programmed such that illumination is controlled by the control circuitry at the exact moment the projectile passes the lens of the camera.

Subject Categories:

  • Photography
  • Optics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE