The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 29, 2003
Filed:
Nov. 20, 1998
Charles J. Radford, Malvern, GB;
Raymond G. White, Malvern, GB;
Robert W M Smith, Malvern, GB;
John T. Savage, Malvern, GB;
John T. O'Connor, Malvern, GB;
Philip J. Kent, Malvern, GB;
Qinetiq Limited, London, GB;
Abstract
A detection system ( ) utilising projected light ( ) viewed through an appropriately placed camera ( ) detects variations in surface height ( ). The system ( ) is arranged to project light onto the surface ( ) of interest. A camera with optical axis ( ) oriented parallel to and offset from the direction of light projection is used to image the intersection ( ) of the projected light ( ) with the surface ( ). The system ( ) observes deflections ( ) of this imaged intersection ( ) and associates them with the movement of an object ( ) through the projected light. The object can range from a surface irregularity ( ) to a person ( ) walking along a corridor.