Laser-based speed measuring device

Details Laser-based speed measuring device Laser-based speed measuring device

1994-07-20

1996-05-28

Buczinski, Stephen C.

Optics: measuring and testing

Range or remote distance finding

With photodetection

342105, 342109, 356 28, 368120, G01C 308, G01P 336, G01S 1358, G04F 800

Patent

active

055216960

ABSTRACT:
A laser speed detector is described which includes a laser rangefinder which determines the time-of-flight of an infrared laser pulse to a target and a microprocessor-based microcontroller. The device is small enough to be easily hand-held, and includes a trigger and a sighting scope for a user to visually select a target and to trigger operation of the device upon the selected target. The laser rangefinder includes self-calibrating interpolation circuitry, a digital logic-operated gate for reflected laser pulses in which both the "opening" and the "closing" of the gate can be selectably set by the microcontroller, and dual collimation of the outgoing laser pulse such that a minor portion of the outgoing laser pulse is sent to means for producing a timing reference signal.

REFERENCES:
patent: 3698811 (1972-10-01), Weil
patent: 4346989 (1982-08-01), Gort et al.
patent: 4527894 (1985-07-01), Goede et al.
patent: 4569599 (1986-02-01), Bolkow et al.
patent: 4620788 (1986-11-01), Giger
patent: 4948246 (1990-08-01), Shigematsu
patent: 5046839 (1991-09-01), Krangle

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