Cascaded pupil-replicating waveguides

US11231579B1 · kind B1 · utility

Assignee

• Facebook Technologies, LLC · US

Inventors

• Giuseppe Calafiore · Redmond, US
• Ningfeng Huang · Redmond, US
• Andrew Maimone · Duvall, US
• Andrew John Ouderkirk · Kirkland, US
• Hee Yoon Lee · Bellevue, US
• Maxwell Parsons · Seattle, US
• Scott Charles McEldowney · Redmond, US
• Babak Amirsolaimani · Redmond, US
• Pasi Saarikko · Kirkland, US
• Wanli Chi · Rochester, US
• Alexander Koshelev · Redmond, US
• Barry D. Silverstein · Menlo Park, US
• Lu Lu · Kirkland, US
• Wai Sze Tiffany Lam · Bothell, US
• Gang Li · Dongguan, CN
• Stephan Lutgen · Regensburg, DE
• Francois Olivier · Cork, IE
• David Massoubre · Cork, IE

Key dates

• Filing date: Jan 18, 2019
• Grant date: Jan 25, 2022
• Expiry date: Nov 6, 2039

Classification

• Technology area (CPC G): Physics
• CPC primary: G02B2027/0178
• WIPO field: Optics
• WIPO sector: Instruments

Abstract

A waveguide assembly is provided. The waveguide assembly includes a pair of pupil-replicating waveguides. The first pupil-replicating waveguide is configured for receiving an input beam of image light and providing an intermediate beam comprising multiple offset portions of the input beam. The second pupil-replicating waveguide is configured for receiving the intermediate beam from the first pupil-replicating waveguide and providing an output beam comprising multiple offset portions of the intermediate beam. The input beam may be expanded by the waveguide assembly in such a manner that pupil gaps are reduced or eliminated.