Abstract

We developed a high-speed linear detection time-domain optical coherence tomography (OCT) technique that detected a reflective grating-generated spatial optical delay in the reference arm using a line scan camera during probe-beam scanning. Using an InGaAs line scan camera (512 pixels) operating at 47,000  lines/s, the calculation of the absolute value of the difference between two sequential lines can be approximately displayed as cross-sectional images with 500 lateral pixels at 94  frames/s. After data acquisition, we performed postprocessing that involves a Hilbert transform to improve the image quality of an OCT image. Our OCT system was successfully used to image a human finger in vivo with 93dB sensitivity.

© 2009 Optical Society of America

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