Original Date: 08/08/1994
Revision Date: 01/18/2007
Best Practice : High Speed Photography
Responding to customer requirements for near real-time viewing of high speed visual imaging Aberdeen Test Center develops techniques to maximize the use of a variety of imaging systems. Acquisition of the right instrumentation to record a specific event in order to provide useful data is the result of research and procurement of specialized systems. Training of personnel to operate the sophisticated software and hardware used in capturing events that occur in nanoseconds is critical to the success of each project.
Several high-speed electronic imaging systems have been adapted for testing to ensure the right tool is used. The Kodak HG-100K is a color high-speed video system capable of recording up to 100,000 partial frames per second (FPS) and has many standard military and commercial uses. Images are stored in Dynamic Random Access Memory. It continuously monitors test operations with a CMOS 1504 X 1128 pixel sensor and exposure rates down to 5 microseconds are possible to eliminate motion blur and deliver razor sharp images. Immediate playback of test results in full motion is also available.
To replace or complement high speed film cameras, the Kodak 4540 high speed video system operates from 4,500 FPS to 40,500 FPS and provides electronic imaging. Images are stored electronically in Dynamic Random Access Memory, and immediate playback of test results in full motion is available. The one-shot ballistic digital range camera (Hadland SVRIII) which operates at a rate of 20 nanoseconds is capable of freezing a projectile in flight for data analysis. Up to 16 cameras can be computer- controlled for one firing and can provide high resolution 2048 X 2048 black and white photographs on site. Data such as pitch, yaw, sabot separation, velocity, and target scoring can be analyzed. Similarly, the color Hadland CSVR provides instant, on-site, high resolution color photographs at 200 nanosecond electronic shutter exposure for capturing in-flight data beyond 2000 meters per second.
ATC remains a leader in the field in ultra high-speed digital imaging with the Ultra NAC High-Speed Imager and the Hadland Imacon 200, which records at equivalent speeds of 20 million FPS and 200 million FPS, respectively. Through electronic conversions, intensifiers, and computer enhancements, both systems produce high resolution images to analyze warhead formation, threat and target interaction, and multiple warhead timing.
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