High range resolution active imaging system using a high speed shutter and a light pulse having a sharp edge
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United States of America Patent
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May 21, 1996
Grant Date -
N/A
app pub date -
Jun 15, 1994
filing date -
Jun 15, 1994
priority date (Note) -
Expired
status (Latency Note)
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Abstract
An active imaging system for viewing targets with a high degree of range resolution of approximately one foot. The imaging system utilizes a laser pulse which passes through an electro-optical pulse slicer which creates a sharp leading edge and/or a sharp falling edge on the laser pulse. The laser pulse travels to the target under observation, illuminates and reflects off of the target and returns to a camera. A target is viewed only during the time all or a portion of the returning laser pulse overlaps the time the camera shutter gate is open. The imaging system is particularly suited for determining depth information about a target by varying the time relationship when the returning laser pulse is received by the camera.
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