A Michelson-type spectral interferometer that uses a common beam path for the reference and the sample arms is described. This optical arrangement is more compact and stable than the more commonly used dual-arm interferometer and is well suited for frequency-domain optical coherence tomography of biological samples. With a 16-bit CCD camera, the instrument has sufficient dynamic range and resolution for imaging to depths of 2 mm in scattering biological materials. Images obtained with this spectral interferometer are presented, including cross-sectional images in a <i>Xenopus laevis</i> tadpole.
© 2003 Optical Society of America
(120.3180) Instrumentation, measurement, and metrology : Interferometry
(170.3880) Medical optics and biotechnology : Medical and biological imaging
(170.4500) Medical optics and biotechnology : Optical coherence tomography
Andrei B. Vakhtin, Daniel J. Kane, William R. Wood, and Kristen A. Peterson, "Common-Path Interferometer for Frequency-Domain Optical Coherence Tomography," Appl. Opt. 42, 6953-6958 (2003)