Is a
Patent attributes
Current Assignee
Patent Jurisdiction
Patent Number
Patent Inventor Names
Kristen A. Peterson0
Andrei B. Vakhtin0
Daniel J. Kane0
Date of Patent
July 1, 2008
Patent Application Number
11438864
Date Filed
May 22, 2006
Patent Primary Examiner
Patent abstract
An apparatus and method for differential spectral interferometry comprising providing an interferometer comprising a light source; employing an element to provide a dithered relative phase shift between target and reference arms of the interferometer, detecting output from the interferometer, demodulating signals received from the detector at different multiples of the dither frequencies, generating more than one real-valued interferograms from demodulated signals, and using the real-valued interferograms to obtain the complex spectral interferogram.
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