Optical vibration imager

Details Optical vibration imager Optical vibration imager

2007-03-20

2007-03-20

Toatley, Jr., Gregory J. (Department: 2877)

Optics: measuring and testing

By light interference

Having light beams of different frequencies

C073S657000

Reexamination Certificate

active

11130927

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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