US2006127898A1PendingUtilityA1

Holographic sensor based on a volume hologram in a porous medium

Assignee: LOWE CHRISTOPHER RPriority: Apr 5, 2002Filed: Apr 4, 2003Published: Jun 15, 2006

Est. expiryApr 5, 2022(expired)· nominal 20-yr term from priority

Inventors:Christopher Robin Lowe Colin Davidson Jeffrey Blyth Satyamoorthy Kabilan Alexander James Marshall Blanca Madrigal Gonzalez Anthony Peter James

G01N 21/4788G02B 5/32G03H 2001/0044G03H 2250/44G01N 21/7703G03H 2270/53G01N 21/47G01N 21/75

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Claims

Abstract

A sensor for the detection of an analyte, comprising a holographic element comprising a medium and a hologram disposed throughout the volume of the medium, wherein an optical characteristic of the hologram changes as a result of a variation of a physical property occurring throughout the volume of the medium, wherein the medium is obtainable by formation in situ in the presence of a pore-forming agent, wherein the agent is not present in the sensor or does not react with the analyte and the sensor.

Claims

exact text as granted — not AI-modified

1 . A sensor for the detection of an analyte, which comprises a holographic element comprising a medium and a hologram disposed throughout the volume of the medium, wherein an optical characteristic of the hologram changes as a result of a variation of a physical property occurring throughout the volume of the medium, wherein the medium is obtainable by formation in situ in the presence of a pore-forming agent, wherein the agent is not present in the sensor or does not react with the analyte and the sensor.  
     
     
         2 . The sensor according to  claim 1 , wherein the physical property is the size of the medium.  
     
     
         3 . The sensor according to  claim 1 , wherein the optical characteristic is the reflectance, refractance or absorbance of the holographic element.  
     
     
         4 . The sensor according to  claim 1 , wherein the agent is a gas.  
     
     
         5 . The sensor according to  claim 1 , wherein the agent is a liquid.  
     
     
         6 . The sensor according to  claim 1 , wherein the agent is water.  
     
     
         7 . The sensor according to  claim 1 , wherein the agent is a solid obtainable by extraction of the agent after the formation.  
     
     
         8 . The sensor according to  claim 1 , wherein the medium is a polymer obtainable by the polymerization of monomers in situ.  
     
     
         9 . The sensor according to  claim 8 , wherein the monomers include hydroxyethyl methacrylate.

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