We demonstrate in vivo optical coherence tomography using a Fourier-domain optical delay line constructed with a commercially available polygonal scanner. The 20-faceted polygonal mirror array, capable of scanning at rates up to 15 kHz, is implemented at 4 kHz to acquire 500 × 500 pixel images at 8 frames/s with a signal-to-noise ratio of 80 dB. Features of this delay line include scalability to high repetition rates, 98.6% linearity in group delay over 2 mm, and bandwidth support exceeding 150 nm. Images are obtained in an animal model (Xenopus laevis), and limitations due to phase-delay nonlinearity and polygon asymmetry are discussed.
© 2003 Optical Society of America
(110.4500) Imaging systems : Optical coherence tomography
(120.3180) Instrumentation, measurement, and metrology : Interferometry
(120.5800) Instrumentation, measurement, and metrology : Scanners
(170.4500) Medical optics and biotechnology : Optical coherence tomography
Amy L. Oldenburg, J. Joshua Reynolds, Daniel L. Marks, and Stephen A. Boppart, "Fast-Fourier-Domain Delay Line for in vivo Optical Coherence Tomography with a Polygonal Scanner," Appl. Opt. 42, 4606-4611 (2003)