Methods and systems for reducing complex conjugat ambiguity in interferometric data
AssigneeDuke University
InventorsMichael Choma, Joseph Izatt, Anjul Davis
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Abstract
A complex conjugate ambiguity can be resolved in an Optical Coherence Tomography (OCT) interferogram. A reference light signal is propagated along a reference path. A sample light signal is impinged on a sample reflector. The reference light signal is frequency shifted with respect to the sample light signal to thereby separate a positive and a negative displacement of a complex conjugate component of the OCT interferogram.
Claims19
A method for resolving a complex conjugate ambiguity in an Optical Coherence Tomography (OCT) interferogram, the method comprising:
- propagating a reference light signal along a reference path;
- impinging a sample light signal on a sample reflector;
- and
- frequency shifting the reference light signal with respect to the sample light signal to thereby separate a positive and a negative displacement of a complex conjugate component of the OCT interferogram.
A interferometry system for resolving a complex conjugate ambiguity in an Optical Coherence Tomography (OCT) interferogram, the system comprising:
- a reference light signal assembly configured to propagate a reference light signal via a reference path;
- a sample light signal assembly configured to impinge a sample light signal on a sample reflector;
- and
- wherein the reference light signal assembly includes a modulator configured to frequency shift the reference light signal with respect to the sample light signal to thereby separate a positive and a negative displacement of a complex conjugate component of the OCT interferogram.
Dependencies are inferred from the claim text.