Patent ID: 8854627

Claim:
A system for imaging body tissue comprising: a beam splitter configured and arranged to receive a light beam and generate a reference light beam and a sample light beam from the light beam; a plurality of modulators, each modulator configured and arranged to receive a portion of the reference light beam, each modulator configured and arranged to modulate the portion of the reference light beam received by that modulator at a unique modulation frequency, wherein the modulation by the plurality of modulators forms a plurality of modulated reference light beams; a beam combiner physically separated from the beam splitter and configured and arranged to receive the sample light beam reflected from a region of body tissue to be imaged and to receive the plurality of modulated reference light beams and to generate a combined light beam from the reflected sample light beam and the plurality of modulated reference light beams; a light detector configured and arranged to receive the combined light beam and output a detector signal based on the combined light beam; a tuner configured and arranged to receive the detector signal and to be tunable over a range of the unique modulation frequencies of the plurality of modulated reference light beams; and a controller configured and arranged to sequentially tune the tuner to each of the unique modulation frequencies one at a time with the tuner consequently converting the detector signal to a tuner output signal.