Improved laser rangefinder sensor

71) Applicant(s):

OSI Optoelectronics, Inc.

12525 Chadron Ave, Hawthorne, CA 90250, United States of America (72) Inventor(s):

Keith Fowler Nan-ming Lai (74) Agent and/or Address for Service:

Barker Brettell LLP

Medina Chambers, Town Quay, SOUTHAMPTON, SO14 2AQ, United Kingdom (54) Title of the Invention: Improved laser rangefinder sensor Abstract Title: Improved laser rangefinder sensor (57) The specification discloses a pulsed time-of-flight laser range finding system used to obtain vehicle classification information. The sensor determines a distance range to portions of a vehicle traveling within a sensing zone of the sensor. A scanning mechanism made of a four facet cube, having reflective surfaces, is used to collimate and direct the laser toward traveling vehicles. A processing system processes the respective distance range data and angle range data for determining the three-dimensional shape of the vehicle.

<img file="GB2508564A_D0001.tif" />