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Proceedings Paper

Design of a spectrometer for all-reflective optics-based line scan Fourier domain optical coherence tomography
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Paper Abstract

Optical design of a spectrometer for all-reflective optics based line scan Fourier domain optical coherence tomography (FD-OCT) imaging has been reported in this work for high-speed scanning. FD-OCT imaging data acquisition offers significantly improved imaging speed in the depth direction compared to conventional time domain optical coherence tomography (TD-OCT). On the other hand, line focused scanning improve imaging speed in the transverse direction compare to commonly used flying spot scanning. Combination of FD-OCT acquisition and line focused scanner can give higher imaging speed. Spectrometer is a critical submodule in FD-OCT system. Apart from the spectrometer optical resolution, and detector array resolution, the chromatic aberration should be considered to design a high-quality FD-OCT imaging spectrometer. The proposed imaging spectrometer consists of a planer reflective grating, off-axis parabolic cylindrical mirror and a CCD array detector. Mirror focusing reduces the chromatic aberration because of its insensitivity to the wavelength of the laser beam, therefore the spectrometer image quality enhanced by the reflective optics focusing. Spot profile fall-off characteristic was analyzed by using ZEMAX optical design software.

Paper Details

Date Published: 22 September 2010
PDF: 6 pages
Proc. SPIE 7750, Photonics North 2010, 775020 (22 September 2010); doi: 10.1117/12.873105
Show Author Affiliations
Mohammad Kamal, Concordia Univ. (Canada)
Narayanswamy Sivakumar, Concordia Univ. (Canada)
Muthukumaran Packirisamy, Concordia Univ. (Canada)

Published in SPIE Proceedings Vol. 7750:
Photonics North 2010
Henry P. Schriemer; Rafael N. Kleiman, Editor(s)

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