Invention Grant
- Patent Title: Multipass scanner for near-eye display
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Application No.: US17555097Application Date: 2021-12-17
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Publication No.: US11698538B2Publication Date: 2023-07-11
- Inventor: Brian Wheelwright , Weichuan Gao , Babak Amirsolaimani , Ying Geng
- Applicant: Meta Platforms Technologies, LLC
- Applicant Address: US CA Menlo Park
- Assignee: META PLATFORMS TECHNOLOGIES, LLC
- Current Assignee: META PLATFORMS TECHNOLOGIES, LLC
- Current Assignee Address: US CA Menlo Park
- Agency: Pequignot + Myers
- Agent Matthew A. Pequignot
- Main IPC: G02B26/08
- IPC: G02B26/08 ; G02B27/18 ; G02B5/10 ; G02B5/30 ; G02B9/06 ; G02B26/10 ; G02B27/00 ; G02B27/28

Abstract:
A multipass scanner usable e.g. in a near-eye display is disclosed. The multipass scanner scans a light beam angularly, forming an image in angular domain. The multipass scanner includes a light source, a tiltable reflector, and a multipass coupler that couples light emitted by the light source to the tiltable reflector, receives the reflected light and couples it back to the tiltable reflector to double the scanning angle. Then, the multipass coupler couples the light reflected at least twice from the tiltable reflector to an exit pupil of the scanner. A pupil-replicating waveguide disposed at the exit pupil of the scanner extends the image in angular domain. Multiple reflections of the light beam from the tiltable reflector enable one to increase the angular scanning range and associated field of view of the display without having to increase the angular scanning range of the tiltable reflector.
Public/Granted literature
- US20220107504A1 MULTIPASS SCANNER FOR NEAR-EYE DISPLAY Public/Granted day:2022-04-07
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