Vibrometer

Details Vibrometer Vibrometer

1997-01-31

1999-04-27

Casler, Brian

Surgery

Diagnostic testing

Detecting nuclear, electromagnetic, or ultrasonic radiation

600473, 600559, 600587, A61B 505

Patent

active

058974946

ABSTRACT:
A vibrometer which detects the variation of the speckle interference pattern of reflected waves as a means of determining the amplitude and frequency of vibrations of structures, including small anatomical structures. A wave source such as a laser delivers wave radiation to the object whose vibration is to be measured. The diffuse reflectance from the textural surface of the object reflects the incident wave radiation as a speckle interference pattern which is detected by a detector, such as a photodetector. The wave radiation source may be a continuous-wave laser, and the photodetector detector may be a phototransistor connected to a wide-bandwidth amplifier. As the object vibrates, the speckle interference pattern moves. The variation in the speckle interference pattern across the detector carries amplitude and frequency information regarding the vibrating object.

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