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Optical Engineering

High-speed video analysis system using multiple shuttered charge-coupled device imagers and digital storage
Author(s): Roberto G. Racca; Owen Stephenson; Reginald M. Clements
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Paper Abstract

A fully solid state high-speed video analysis system is presented. It is based on the use of several independent charge-coupled device (CCD) imagers, each shuttered by a liquid crystal light valve. The imagers are exposed in rapid succession and are then read out sequentially at standard video rate into digital memory, generating a time-resolved sequence with as many frames as there are imagers. This design allows the use of inexpensive, consumer-grade camera modules and electronics. A microprocessor-based controller, designed to accept up to ten imagers, handles all phases ofthe recording from exposure timing to image capture and storage to playback on a standard video monitor. A prototype with three CCD imagers and shutters has been built. It has allowed successful three-image video recordings of phenomena such as the action of an air rifle pellet shattering a piece of glass, using a high-intensity pulsed light emitting diode as the light source. For slower phenomena, recordings in continuous light are also possible by using the shutters themselves to control the exposure time. The system records full-screen black and white images with spatial resolution approaching that of standard television, at rates up to 5000 images per second.

Paper Details

Date Published: 1 June 1992
PDF: 6 pages
Opt. Eng. 31(6) doi: 10.1117/12.56173
Published in: Optical Engineering Volume 31, Issue 6
Show Author Affiliations
Roberto G. Racca, Racca Scientific Consulting (Canada)
Owen Stephenson, NovAtel Communications Ltd. (Canada)
Reginald M. Clements, Univ. of Victoria (Canada)

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