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:
Sep. 08, 2015
Filed:
May. 23, 2011
Robert Bruce Charters, Australian Capital Territory, AU;
Dax Kukulj, Australian Capital Territory, AU;
Warwick Todd Holloway, Australian Capital Territory, AU;
Duncan Ian Ross, Australian Capital Territory, AU;
Graham Roy Atkins, Australian Capital Territory, AU;
Robert Bruce Charters, Australian Capital Territory, AU;
Dax Kukulj, Australian Capital Territory, AU;
Warwick Todd Holloway, Australian Capital Territory, AU;
Duncan Ian Ross, Australian Capital Territory, AU;
Graham Roy Atkins, Australian Capital Territory, AU;
ZETTA RESEARCH AND DEVELOPMENT LLC—RPO SERIES, Wilmington, DE (US);
Abstract
We present optical systems suitable for focusing two substantially collimated beams or sheets of light propagating in different directions onto a common focal point. In some embodiments the optical systems comprise separate focusing elements for each beam or sheet of light, while in other embodiments the optical systems comprise a focusing element and a redirection element. The optical systems have particular application in the receive optics of infrared touch screens, where they enable the detection of additional light paths that assist in the determination of two or more simultaneous touch events.