Bowater Holographic Research Limited;Harman Technology Limited
发明人:
WILTSHIRE, John David,WILTSHIRE, Jonathan Henry,RHODES, Trevor
申请号：
EP20150744960
公开号：
EP3172602(A2)
申请日:
2015.07.24
申请国别(地区):
欧洲专利局
年份:
2017
代理人:
摘要：
We describe a window assembly comprising: a window pane comprising a glass or plastic sheet; and a layer of holographic recording medium attached to said glass or plastic sheet; wherein said layer of holographic recording medium has recorded within the medium a volume hologram configured to direct light incident onto said glass or plastic sheet to propagate within a thickness of said glass or plastic sheet. In embodiments the volume hologram is fabricated by recording a transmission hologram and shrinking the recorded hologram to convert the transmission hologram to an edge- directing hologram configured to direct light in a direction to be totally internally reflected within the window pane, for example at greater than 40°, 50°, 60°, 70°, 75° or 80° to a normal to the surface of the hologram.
