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:
Mar. 24, 2009
Filed:
Jan. 15, 2004
Jonathan N. Payne, San Jose, CA (US);
Jonathan N. Payne, San Jose, CA (US);
Poa Sana Liquidating Trust, Mountain View, CA (US);
Abstract
A waveguide system wherein a top cladding layer leaves portions of an underlying core channel exposed to ambient air. The ends of core channels are exposed so that light can exit out of or enter into each of the core channels. Openings are formed in the top cladding layer to expose a curved section of a core channel to the ambient air. The low index of refraction of the ambient air allows the curved section to have a reduced turn radius and thereby allows the waveguide system to have a smaller footprint. A via in the top cladding layer provides access to an underlying core channel so that optical communication with the underlying core can be established. An optical computer input device formed of waveguide systems having top cladding layers that leave portions of an underlying core channel exposed.