Invention Application
- Patent Title: LIGHTGUIDE WITH A FREEFORM INCOUPLER AND A HOLOGRAPHIC OUTCOUPLER
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Application No.: US17531146Application Date: 2021-11-19
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Publication No.: US20220163804A1Publication Date: 2022-05-26
- Inventor: Ozan Cakmakci , Timothy Paul Bodiya
- Applicant: GOOGLE LLC
- Applicant Address: US CA Mountain View
- Assignee: GOOGLE LLC
- Current Assignee: GOOGLE LLC
- Current Assignee Address: US CA Mountain View
- Main IPC: G02B27/01
- IPC: G02B27/01 ; F21V8/00 ; G02B27/00 ; G03H1/02

Abstract:
A lightguide includes an incoupler configured to receive light emitted from a microdisplay and to direct the received light into the lightguide, a first non-planar major surface and a second non-planar major surface configured to reflect the light directed into the lightguide by the incoupler, and an outcoupler comprising a non-planar, angle selective hologram configured to receive light reflected from at least one of the first major surface and the second major surface and to selectively direct the light out of the lightguide based on the angle of incidence at the hologram.
Information query