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OXYGEN SENSOR USING PRINCIPLE OF SURFACE PLASMON RESONANCE AND OXYGEN TRANSMISSION RATE MEASUREMENT SYSTEM INCLUDING THE SAME

  • US 20100045997A1
  • Filed: 08/18/2009
  • Published: 02/25/2010
  • Est. Priority Date: 08/21/2008
  • Status: Active Grant
First Claim
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1. An oxygen sensor using a principle of surface plasmon resonance, comprising:

  • a laser diode for emitting light;

    a polarizer for converting light emitted from the laser diode into polarized light;

    a prism for receiving the polarized light from the polarizer and having a sensor substrate provided on one surface thereof so that the polarized light is reflected, the sensor substrate being coated with an oxygen-sensitive organic material;

    an oxygen concentration measurement chamber provided to enclose the sensor substrate so that oxygen a concentration of which is to be measured is contained therein;

    a photodiode for measuring an amount of light reflected from the prism; and

    a microcontroller unit for controlling operation of the oxygen sensor and calculating the concentration of oxygen,wherein the concentration of oxygen is determined using the microcontroller unit having values of absolute concentration corresponding to the amount of light measured using the photodiode, andthe concentration of oxygen is measured in a state in which an incidence angle of the polarized light incident on the sensor substrate is fixed.

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