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:
Jun. 09, 2009
Filed:
Oct. 25, 2005
Dax Kukulj, Acton, AU;
Benjamin Cornish, Palmerston, AU;
Robert Bruce Charters, Palmerston, AU;
Graham Roy Atkins, Kaleen, AU;
Barry Luther-davies, Kambah, AU;
Dax Kukulj, Acton, AU;
Benjamin Cornish, Palmerston, AU;
Robert Bruce Charters, Palmerston, AU;
Graham Roy Atkins, Kaleen, AU;
Barry Luther-Davies, Kambah, AU;
RPO Pty Limited, Act, AU;
Abstract
Planar lenses for integrated optics applications, in particular for use in optical touch screen sensors are disclosed. The disclosed planar lenses include a slab waveguide and an optical waveguide, preferably formed in unitary fashion, wherein the slab waveguide has a curved end face to focus light into or out of the optical waveguide, and wherein at least one additional lens is included within the slab waveguide. In one aspect of this disclosure, the additional lens is a diverging lens. In a second aspect the additional lens is a converging lens. The additional lens may match the acceptance angle of the optical waveguide to the curved end face of the slab waveguide. Alternatively, it may improve the tolerance of the planar lens to design or assembly errors and/or temperature variations. Preferably, the planar lenses are composed of a photo-patternable polymer, and the additional lenses are composed of air.