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:
Dec. 02, 2008
Filed:
Nov. 11, 2003
Andrew C Lewin, Malvern, GB;
David a Orchard, Malvern, GB;
Andrew C Lewin, Malvern, GB;
David A Orchard, Malvern, GB;
QinetiQ Limited, London, GB;
Abstract
This invention relates to a proximity sensor. An illumination means () projects an array of spots () towards a scene. Detector () looks towards the scene through a mask (). The mask () is arranged such that light from a target at a certain range, for instance far object () is not transmitted to the detector. Light reflected from a close object () however passes through the mask () and is incident on the detector (). A rise in the intensity of incident light at the detector () is determined by threshold detector () and used to operate an alarm ().
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile