WILTSHIRE John David;WILTSHIRE Jonathan Henry;RHODES Trevor
发明人:
WILTSHIRE John David,WILTSHIRE Jonathan Henry,RHODES Trevor
申请号:
US201515328638
公开号:
US2017212289(A1)
申请日:
2015.07.24
申请国别(地区):
美国
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.