Optical pressure-sensing system and method for sensing pressure

Measuring and testing – Fluid pressure gauge – Photoelectric

Reexamination Certificate

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C250S231190

Reexamination Certificate

active

07104135

ABSTRACT:
The optical pressure-sensing system essentially comprises a light source, a resonant cavity and a detector, where the light source is used for generating a light with a predetermined wavelength, the resonant cavity includes a stationary wall with a stationary plane and a movable wall with a movable plane, and the detector is used for detecting a resonated light generated in the resonant cavity by resonating the light between the stationary plane and the movable plane. According to the present invention, a first light is generated and resonated in a resonant cavity to amplify the interaction between the first light and gas molecules in the resonated cavity. The interaction is measured, and the pressure in the resonant cavity is calculated based on the interaction. The interaction between the light and gas molecules in the resonant cavity may change the polarization angle or the phase of the light.

REFERENCES:
patent: 4270091 (1981-05-01), Mann
patent: 4933545 (1990-06-01), Saaski et al.
patent: 5908988 (1999-06-01), Lee et al.
Hecht, Eugene; Optics; 1998; Addison-Wesley; Third Edition; pp. 362-363.

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