Radiant energy – Ionic separation or analysis – Static field-type ion path-bending selecting means
Patent
1986-10-01
1988-10-04
Sikes, William L.
Radiant energy
Ionic separation or analysis
Static field-type ion path-bending selecting means
350 9611, 350 9612, 350 9615, 350 9630, 350371, 250227, 250231P, 73800, G02B 602, H01J 516, G01L 124
Patent
active
047752149
ABSTRACT:
An optical sensor for providing an output signal representative of a sensed parameter such as pressure or temperature which includes an input/output optical waveguide and an optical resonator. The input/output waveguide is coupled to the resonator so that a significant change in light intensity at the output of the input/output waveguide occurs at resonance of the optical resonator. The optical resonator exhibits first and second independent resonant modes which differ from one another as a function of the parameter to be sensed. A narrow bandwidth variable frequency light source provides a frequency swept light beam to the input/output waveguide, and one or more photodetectors sense the intensity of the light beam at the output of the input/output waveguide to produce an output signal representative of the parameter based upon the time difference between occurrence of the first and second resonant modes.
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Healy Brian M.
Rosemount Inc.
Sikes William L.
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