Optical vibration imager
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United States of America Patent
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Mar 20, 2007
Grant Date -
Nov 23, 2006
app pub date -
May 17, 2005
filing date -
May 17, 2005
priority date (Note) -
In Force
status (Latency Note)
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Abstract
A remote sensor capable of imaging vibrations at many simultaneous points using high-speed imaging cameras is disclosed. The preferred embodiment operates in heterodyne detection mode using a single camera to capture signals to recover multi-pixel vibrations. One alternative embodiment employs two cameras and homodyne optical I/Q detection. A second alternative embodiment uses a single camera and temporally phase shifted local oscillator to also carry out homodyne optical I/Q detection. The disclosed sensors are capable of scalability to large numbers of pixels and can capture vibration frequencies over a wide range.
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