Optics: measuring and testing – By light interference – For dimensional measurement
Reexamination Certificate
2005-04-13
2008-12-09
Connolly, Patrick J (Department: 2877)
Optics: measuring and testing
By light interference
For dimensional measurement
C356S479000
Reexamination Certificate
active
07463362
ABSTRACT:
The present invention provides systems, methods and apparatuses that perform digital detection for use in optical tomography. Methods and systems are provided in which digital lock-in detection is performed using an algorithm that employs a phase-independent quadrature technique. Methods and systems are provided in which a unique manipulation of an ordinary averaging filter optimized for sources discrimination and the consequent sampling constraints is presented as a novel filtering scheme for the lock-in detection. Systems and apparatuses are provided which include a digital signal processor which performs digital lock-in detection and an integrated complex programmable logic device for timing control. Apparatuses are provided which include an instrument having an integrated digital signal processor for performing digital processing and detection for use in optical tomography.
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Hielscher Andreas
Lasker Joseph M.
Masciotti James M.
Schmitz Christoph H.
Schoenecker Mathew
Connolly Patrick J
The Research Foundation of State University of New York
The Trustees of Columbia University in the City of New York
Wilmer Cutler Pickering Hale and Dorr LLP
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