- 专利标题: Low-obliquity pupil relay for near-eye display
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申请号: US16592163申请日: 2019-10-03
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公开(公告)号: US11415794B2公开(公告)日: 2022-08-16
- 发明人: Weichuan Gao , Brian Wheelwright , Babak Amirsolaimani
- 申请人: Facebook Technologies, LLC
- 申请人地址: US CA Menlo Park
- 专利权人: Facebook Technologies, LLC
- 当前专利权人: Facebook Technologies, LLC
- 当前专利权人地址: US CA Menlo Park
- 代理机构: Pequignot + Myers
- 代理商 Matthew A. Pequignot
- 主分类号: G02B26/12
- IPC分类号: G02B26/12 ; G01S7/481 ; G02B27/01 ; G02B27/28 ; G02B17/02 ; G02B26/10 ; G03B21/28
摘要:
A beam scanner for a near-eye display includes a beam-folded pupil relay configured for receiving a light beam reflected from a tiltable reflector and relaying the light beam to an exit pupil while preserving the beam angle of the reflected beam. The beam-folding pupil relay includes a beamsplitter, e.g. a polarization beam splitter configured to redirect the beam to a curved reflector, which sends the beam towards the exit pupil. Polarization of the light beam reflected from the curved reflector may be changed to an orthogonal polarization by a waveplate disposed in an optical path of the light beam between the polarization beam splitter and the curved reflector, enabling the reflected light beam to propagate through the polarization beam splitter towards the exit pupil. A pupil-replicating waveguide may be disposed proximate the exit pupil. A 2D tiltable reflector or a pair of 1D tiltable reflectors may be used.
公开/授权文献
- US20210103140A1 LOW-OBLIQUITY PUPIL RELAY FOR NEAR-EYE DISPLAY 公开/授权日:2021-04-08
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