Holographic Sensors and Their Uses
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United States of America Patent
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Issued Date -
Sep 4, 2008
app pub date -
Jul 18, 2006
filing date -
Jul 18, 2005
priority date (Note) -
Abandoned
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Abstract
A method of analysing a holographic sensor (1) comprising a hologram, wherein interaction of the holographic sensor with a stimulant causes a change in the wavelength of diffracted light from the hologram, comprises the steps of: a) viewing light diffracted by the hologram and specular reflections in an image plane of a lens; b) viewing light diffracted by the hologram and specular reflections in a focal plane of the lens or of a different lens; c) interacting the holographic sensor with a stimulant and determining the change in the wavelength of diffracted light; and d) using the information obtained to determine a property of the stimulant or of the sensor. A device suitable for use in such a method comprises a lens (3), means for detecting light in the image (4) and focal (5) planes of the lens, and image-processing software.
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