Device for measuring the speed of moving light-scattering object

Details Device for measuring the speed of moving light-scattering object Device for measuring the speed of moving light-scattering object

1988-05-16

1990-05-08

Buczinski, Stephen C.

Optics: measuring and testing

Velocity or velocity/height measuring

With light detector

250553, G01P 336, H01L 3114

Patent

active

049232983

ABSTRACT:
In a device for measuring the speed of moving light-scattering objects by means of laser beams, with which a periodic intensity distribution (4) is produced at the measuring point (3), and by means of a detecting device (5, 7; 8, 9, 10) for light scattered by the object, it is possible to produce the periodic intensity distribution in a simple fashion with a laser diode array (1) in which a plurality of laser diodes are arranged at a defined separation from one another. Light emitted by the laser diode is focussed at the measuring point (3) with a focusing optical system (2). In addition, when measuring speed it is possible to discriminate direction by arranging the laser diode array (1, 13) such that no emission occurs in at least one such location (11') of the laser diode (11), so that an asymmetric intensity distribution is produced at the measuring point (3).

REFERENCES:
patent: 3691390 (1972-09-01), Chow et al.
patent: 3902803 (1975-09-01), Lego
patent: 3967899 (1976-07-01), O'Meara
patent: 4483614 (1984-11-01), Rogers
patent: 4537503 (1985-08-01), Liu
patent: 4669876 (1987-06-01), Dopheide
"Beam Scanning with Twin-Strip Injection Lasers", D. R. Scifres, W. Steifer, and R. D. Burnham, Appl;. Phys. Lett., vol. 33, No. 8, Oct. 15, 1978.
Dopheide et al., "Geschwindigkeits-Und Durchflubmessung Mit Optoelektronischen Bauelementen" (Velocity and Flowrate Measurements Using Opto-electronic Devices), Technisches Messen tm, 52, Jahrgang, Heft, 6/1985, pp. 253-263.
"Das Lichtzonen-Anemometer", Dobrinski et al., Messen Prufen Automatisieren, Jul./Aug. 1986, pp. 416-420.

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