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Title:
SEE-THROUGH IR FRONTLIGHT WITH EMBEDDED PARTIALLY REFLECTIVE FACETS
Document Type and Number:
WIPO Patent Application WO/2015/200154
Kind Code:
A3
Abstract:
A flat illuminator having substantially reduced or no diffractive artifacts may be realized by using a partially reflective, embedded layer of extraction features, such as partially reflective facets or partially reflective bumpy surface, buried with substantially matching refractive index on both sides of layer. Implementations may be used in creating infrared (IR) illumination, either as a frontlight unit (FLU) or backlight unit (BLU), as well as for supporting a floating image of IR illumination in a retroreflective, reconvergent imaging or a retroimaging application.

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Inventors:
POWELL KARLTON (US)
Application Number:
PCT/US2015/036859
Publication Date:
March 03, 2016
Filing Date:
June 22, 2015
Export Citation:
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Assignee:
MICROSOFT TECHNOLOGY LICENSING LLC (US)
International Classes:
F21V8/00
Domestic Patent References:
WO2002050590A12002-06-27
Foreign References:
US20120224388A12012-09-06
GB2431001A2007-04-11
EP1055872A12000-11-29
EP0704655A11996-04-03
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