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:
Apr. 01, 2008
Filed:
Feb. 07, 2006
Robbie Charters, Palmerston, AU;
Benjamin Cornish, Palmerston, AU;
Barry Luther-davies, Kambah, AU;
Dax Kukulj, Acton, AU;
Graham Atkins, Kaleen, AU;
Robbie Charters, Palmerston, AU;
Benjamin Cornish, Palmerston, AU;
Barry Luther-Davies, Kambah, AU;
Dax Kukulj, Acton, AU;
Graham Atkins, Kaleen, AU;
RPO Pty Limited, Acton, ACT, AU;
Abstract
This invention relates to devices for coupling light between an optical waveguide and an optical element in a manner that is substantially independent of temperature, using reflective optics. Certain embodiments of the invention concern improved designs for the transmit and receive optics of a waveguide-based optical touch screen sensor, incorporating reflective optics. The improved designs have substantially temperature independent operation and reduced optical losses. In one preferred embodiment the improved design incorporates a parabolic or quasi-parabolic reflector. In another preferred embodiment the improved design incorporates an elliptical or quasi-elliptical reflector. The transmit and receive elements and associated waveguides preferably comprise photo-patternable polymers.