Radar apparatus and a vehicle safe distance control system using

Details Radar apparatus and a vehicle safe distance control system using Radar apparatus and a vehicle safe distance control system using

1997-04-03

1999-01-26

Hellner, Mark

Optics: measuring and testing

Range or remote distance finding

With photodetection

356 501, G01C 308

Patent

active

058643915

ABSTRACT:
A radar apparatus comprises a rotary polygon mirror with a plurality of mirror surfaces inclined at different angles. A semiconductor laser diode and a collimator lens are disposed above the polygon mirror. An infrared pulse beam emitted from the semiconductor laser diode is reflected by a reflection mirror disposed at an upper position in front of the polygon mirror to reflect the pulse beam obliquely downward toward the rotary polygon mirror so that the pulse beam is reflected as a transmission beam advancing toward a measuring area in a forward direction. A light receiving means receives the transmission beam returned from an object positioned within the measuring area.

REFERENCES:
patent: 4733072 (1988-03-01), Lettington
patent: 4929952 (1990-05-01), Schneider et al.
patent: 5648852 (1997-07-01), Kato et al.

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