Invention Grant
- Patent Title: Exit pupil expanders with spherical and aspheric substrates
- Patent Title (中): 退出具有球形和非球面衬底的瞳孔扩张器
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Application No.: US12746226Application Date: 2007-12-17
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Publication No.: US08830584B2Publication Date: 2014-09-09
- Inventor: Pasi Saarikko , Tapani Levola
- Applicant: Pasi Saarikko , Tapani Levola
- Applicant Address: FI Espoo
- Assignee: Nokia Corporation
- Current Assignee: Nokia Corporation
- Current Assignee Address: FI Espoo
- Agency: Harrington & Smith
- International Application: PCT/IB2007/003965 WO 20071217
- International Announcement: WO2009/077803 WO 20090625
- Main IPC: G02B5/18
- IPC: G02B5/18 ; G02B27/12 ; G02B27/00 ; G02B27/01
Abstract:
The specification and drawings present a new apparatus and method for using exit pupil expanders (EPE) with spherical or aspheric non-flat substrates and a plurality of diffractive elements for expanding the exit pupil of a display for viewing in order to reduce image spreading. This can also enable improved image resolution and utilization of shorter focus distances.
Public/Granted literature
- US20100315719A1 Exit Pupil Expanders with Spherical and Aspheric Substrates Public/Granted day:2010-12-16
Information query
