Laser doppler speed measuring apparatus

Details Laser doppler speed measuring apparatus Laser doppler speed measuring apparatus

1996-09-05

1998-09-29

Oda, Christine K.

Measuring and testing

Vibration

Sensing apparatus

356 285, G01N 2141

Patent

active

058147322

ABSTRACT:
A laser Doppler speed measuring apparatus comprises a laser light source, a photodetector, an FM demodulator, and an integrated filter circuit. A selector switch is interposed between the FM demodulator and the integrated filter circuit so as to ensure switching between an output of the FM demodulator and a terminal for directly receiving an external signal.

REFERENCES:
patent: 4281245 (1981-07-01), Brogardh
patent: 4666295 (1987-05-01), Duvall, III et al.
patent: 5534992 (1996-07-01), Takeshima

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