- Patent Title: Optical assembly with holographic optics for folded optical path
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Application No.: US16782604Application Date: 2020-02-05
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Publication No.: US11360308B2Publication Date: 2022-06-14
- Inventor: Andrew Maimone , Junren Wang , Barry Silverstein
- Applicant: Facebook Technologies, LLC
- Applicant Address: US CA Menlo Park
- Assignee: Facebook Technologies, LLC
- Current Assignee: Facebook Technologies, LLC
- Current Assignee Address: US CA Menlo Park
- Agency: Morgan, Lewis & Bockius LLP
- Main IPC: G02B27/01
- IPC: G02B27/01 ; G02B27/28 ; G02B27/00 ; G02B27/14 ; G02B27/02 ; G02B27/48 ; G02B5/18 ; G02B5/32 ; G02B17/00 ; G02B27/10

Abstract:
An optical device for a head-mounted display device includes a first partial reflector and a second partial reflector positioned relative to the first partial reflector so that the second partial reflector receives first light transmitted through the first partial reflector and reflects at least a portion of the first light toward the first partial reflector as second light. At least a portion of the second light is reflected by the first partial reflector as third light, and at least a portion of the third light is transmitted through the second partial reflector. At least one of the first partial reflector or the second partial reflector includes a reflective holographic element.
Public/Granted literature
- US20210223548A1 OPTICAL ASSEMBLY WITH HOLOGRAPHIC OPTICS FOR FOLDED OPTICAL PATH Public/Granted day:2021-07-22
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