Apparatus for measuring high frequency vibration, motion, or dis

Details Apparatus for measuring high frequency vibration, motion, or dis Apparatus for measuring high frequency vibration, motion, or dis

1993-04-06

1995-02-28

Buczinski, Stephen C.

Optics: measuring and testing

Range or remote distance finding

With photodetection

356 285, 356 409, 73657, G01C 300, G01C 308, G01B 902

Patent

active

053942337

ABSTRACT:
Apparati and methods are disclosed for detecting vibrations, displacements and motions of a remote surface with high sensitivity, high frequency response and high accuracy using a laser beam with optical modulation, optical hetrodyning and phase detection. High speed digital signal processing is used. Shared aperture design is employed for utilization of a flat target, double-pass design for large lateral movement tolerance with high resolution, and dual target design for detection of displacement as well as angular changes in vibrational motion.

REFERENCES:
patent: 4447149 (1984-05-01), Marcus et al.
patent: 4466738 (1984-08-01), Huang et al.
patent: 4572662 (1986-02-01), Silverman
patent: 4834531 (1989-05-01), Ward
patent: 4990791 (1991-02-01), Nishi
patent: 5164784 (1992-11-01), Waggoner
patent: 5267011 (1993-11-01), Callender

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