Invention Grant
- Patent Title: Pupil equalization
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Application No.: US16089702Application Date: 2017-03-01
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Publication No.: US10976550B2Publication Date: 2021-04-13
- Inventor: Mark Ayres , Adam Urness , Kenneth Anderson , Friso Schlottau
- Applicant: Akonia Holographics LLC
- Applicant Address: US CO Longmont
- Assignee: Akonia Holographics LLC
- Current Assignee: Akonia Holographics LLC
- Current Assignee Address: US CO Longmont
- Agent Michael H. Lyons
- International Application: PCT/US2017/020298 WO 20170301
- International Announcement: WO2017/176393 WO 20171012
- Main IPC: G02B27/01
- IPC: G02B27/01 ; G02F1/295 ; F21V8/00 ; G03H1/04

Abstract:
An optical reflective device for pupil equalization including at least one or more grating structures within a grating medium is disclosed. The grating structures may have reflective axes that need not be constrained to surface normal. The grating structures are configured to reflect light about substantially constant reflective axes across a relatively wide range of wavelengths. The optical reflective device may reflect light towards a specific location, such as an exit pupil or eye box. Each grating structure within the device may be configured to reflect light of a particular wavelength at a plurality of incidence angles.
Public/Granted literature
- US20210109350A9 PUPIL EQUALIZATION Public/Granted day:2021-04-15
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