G - Physics
01
N
G01N 21/17 (2006.01) G01N 21/55 (2006.01) G01N 21/75 (2006.01)
Patent
CA 2101421
2101421 9306463 PCTABS00021 An optical sensor senses the presence of an analyte in a fluid. The sensor has a surface plasmon resonance-sensitive device (17) which reflects light from a light source (11) to a light detector (34). A ''pinhole'' aperture (33) determines the portion of the reflected light which is permitted to reach the light detector. On exposure to the analyte the device (17) responds so as to alter the intensity of the light reflected to the light detector (34). The detector produces an output signal representative, for example, of the concentration of the analyte. The concentration is indicated by an indicating means (35).
Jaggers Henry Charles
Peacock Stanley John
Shaw John Spence
Bg Plc
Gowling Lafleur Henderson Llp
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