System and method for optical sensing of surface motions

Optics: measuring and testing – By light interference – For dimensional measurement

Reexamination Certificate

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Reexamination Certificate

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07957006

ABSTRACT:
There is provided an optical perturbation sensing system, including a probing beam incident on a medium, a sensing beam redirected from the medium and incident on a surface area of a photodetector, an array of photodetector elements, and a constructive combiner for constructively combining detected signals from the elements, to form a stronger detected signal. A method for detection of perturbations in a medium is also provided. The invention avoids the need for detection of the phase or the frequency variations of the scattered signal as used in the more complex hitherto-proposed approaches.

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patent: 2005/0210982 (2005-09-01), Pepper et al.
patent: 2009/0027688 (2009-01-01), Pouet
patent: 2052048 (1981-01-01), None
patent: 5-141965 (1993-06-01), None
patent: WO 86/06845 (1986-11-01), None
patent: WO 03/089955 (2003-10-01), None
International Search Report for PCT/IL2007/000406 dated Aug. 3, 2007.

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