Title:
HOLOGRAPHIC WINDOWS
Document Type and Number:
WIPO Patent Application WO/2016/012813
Kind Code:
A3
Abstract:
We describe a window assembly (100) comprising: a window pane (102) comprising a glass or plastic sheet; and a layer of holographic recording medium (104) attached to said glass or plastic sheet; wherein said layer of holographic recording medium has recorded within the medium a volume hologram (106) configured to direct light incident onto said glass or plastic sheet to propagate within a thickness of said glass or plastic sheet, preferably to a photovoltaic element (120). 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.
Inventors:
WILTSHIRE JOHN DAVID (GB)
WILTSHIRE JONATHAN HENRY (GB)
RHODES TREVOR (GB)
WILTSHIRE JONATHAN HENRY (GB)
RHODES TREVOR (GB)
Application Number:
PCT/GB2015/052158
Publication Date:
March 17, 2016
Filing Date:
July 24, 2015
Export Citation:
Assignee:
BOWATER HOLOGRAPHIC RES LTD (GB)
HARMAN TECHNOLOGY LTD (GB)
HARMAN TECHNOLOGY LTD (GB)
International Classes:
G03H1/00; G02B5/32; G03H1/04; G03H1/18; G03H1/20; G03H1/22; H01L31/054
Foreign References:
| US5877874A | 1999-03-02 | |||
| US20090199893A1 | 2009-08-13 |
Other References:
UPATNIEKS J: "EDGE-ILLUMINATED HOLOGRAMS", APPLIED OPTICS, OPTICAL SOCIETY OF AMERICA, WASHINGTON, DC; US, vol. 31, no. 8, 10 March 1992 (1992-03-10), pages 1048 - 1052, XP000258286, ISSN: 0003-6935, DOI: 10.1364/AO.31.001048
Attorney, Agent or Firm:
MARKS & CLERK LLP (Cambridge Cambridgeshire CB2 1LA, GB)
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