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Proceedings Paper

Single-shot full-field OCT based on four quadrature phase-stepped interferometer
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Paper Abstract

We demonstrate a compact single-shot full-field optical coherence tomography (OCT) system for obtaining real-time high-resolution depth resolved en-face OCT images from weakly scattering specimens. The experimental setup is based on a Linnik type polarization Michelson interferometer and a four-channel compact polarization phase stepper optics. The four-channel phase-stepper optics comprise of a dual channel beam splitter, a Wollaston prism and a pair of wave plate for simultaneously capturing four quadratually phase-stepped images on a single CCD. The interferometer is illuminated using a SLD source with a central wavelength of 842 nm and a bandwidth of 16.2 nm, yielding an axial resolution of 19.8 μm. Using a 10 × (0.25-NA) microscope objective and a CCD camera with 400 × 400 pixels, the system covers an area of 225 μm × 225 μm with a transverse resolution of 4.4 μm. The en-face OCT images of an onion is measured with an exposure time of 7ms and a frame rate of 28 fps.

Paper Details

Date Published: 28 February 2008
PDF: 8 pages
Proc. SPIE 6847, Coherence Domain Optical Methods and Optical Coherence Tomography in Biomedicine XII, 684717 (28 February 2008); doi: 10.1117/12.759615
Show Author Affiliations
Molly Subhash Hrebesh, Yamagata Univ. (Japan)
Yuuki Watanabe, Yamagata Univ. (Japan)
Razvan Dabu, National Institute for Laser, Plasma and Radiation Physics (Romania)
Manabu Sato, Yamagata Univ. (Japan)

Published in SPIE Proceedings Vol. 6847:
Coherence Domain Optical Methods and Optical Coherence Tomography in Biomedicine XII
Joseph A. Izatt; James G. Fujimoto; Valery V. Tuchin, Editor(s)

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