Optical pin apparatus for measuring the arrival time and velocity of shock waves and particles
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United States of America Patent
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Mar 10, 1987
Grant Date -
N/A
app pub date -
Oct 18, 1983
filing date -
Oct 18, 1983
priority date (Note) -
Expired
status (Latency Note)
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Abstract
An apparatus for the detection of the arrival and for the determination of the velocity of disturbances such as shock-wave fronts and/or projectiles. Optical pins using fluid-filled microballoons as the light source and an optical fiber as a link to a photodetector have been used to investigate shock-waves and projectiles. A microballoon filled with a noble gas is affixed to one end of a fiber-optic cable, and the other end of the cable is attached to a high-speed streak camera. As the shock-front or projectile compresses the microballoon, the gas inside is heated and compressed producing a bright flash of light. The flash of light is transmitted via the optic cable to the streak camera where it is recorded. One image-converter streak camera is capable of recording information from more than 100 microballoon-cable combinations simultaneously.
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