Interferometric optical sensor for measuring glucose concentration.
With a specially designed probe, the phase difference between s andp polarization of light reflected under surface-plasmon resonance is measured by use of a common-path heterodyne interferometer. For specific ratios of phase difference to glucose concentration, the glucose concentration can be estimated as a function of the measured phase data. A prototype was set up to demonstrate the feasibility of this sensor, which was experimentally tested in the range 40-500 mg/dl with a small quantity of solution and had a measurement resolution of 1.41 mg/dl at 25 degrees C.
Chen
Kun-Huang
KH
Institute of Electro-Optical Engineering, National Chiao Tung University, 1001 Ta-Hsueh Road, Hsin-Chu 300, Taiwan, China.
Hsu
Cheng-Chih
CC
Su
Der-Chin
DC
D005240:Feasibility Studies; D005947:Glucose / Q000032:analysis*; D007368:Interferometry / Q000295:instrumentation; D008859:Microscopy, Polarization; D055095:Optics and Photonics; D009994:Osmolar Concentration; D020349:Surface Plasmon Resonance
D005947:Glucose