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Title:
HOLOGRAM
Document Type and Number:
WIPO Patent Application WO/2011/144939
Kind Code:
A3
Abstract:
A substrate includes a diffracting structure providing a hologram which encodes one or more holographic images. Every image of the one or more holographic images has a holographic location at either a finite or substantially infinite effective optical distance. The hologram is to be used as an ophtahlmic eye chart or an eye exercise device or to provide a scale for measuring distances.

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Inventors:
HALL SIMON RICHARD GEOFFREY (GB)
STEVENS RICHARD FREDERICK (GB)
Application Number:
PCT/GB2011/050952
Publication Date:
February 16, 2012
Filing Date:
May 19, 2011
Export Citation:
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Assignee:
SEC DEP FOR BUSINESS INNOVATION AND SKILLS OF HER MAJESTY S BRITANNIC GOVERNMENT (GB)
HALL SIMON RICHARD GEOFFREY (GB)
STEVENS RICHARD FREDERICK (GB)
International Classes:
A61H5/00; A61B3/032; G01B9/00; G03B13/00; G03H1/00
Domestic Patent References:
WO2003090612A12003-11-06
Foreign References:
DE3405778A11985-08-22
US20050213035A12005-09-29
US20040021950A12004-02-05
US5349179A1994-09-20
US5629773A1997-05-13
US4834475A1989-05-30
DE4219311A11992-12-17
Other References:
M. PARKER GIVENS: "Introduction to Holography", AMERICAN JOURNAL OF PHYSICS, vol. 35, no. 11, 1 November 1967 (1967-11-01), pages 1056 - 1064, XP055006413, DOI: http://dx.doi.org/10.1119/1.1973727
Attorney, Agent or Firm:
WILLIAMS, Powell (11 Staple Inn Buildings, London Greater London WC1V 7QH, GB)
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