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Proceedings Paper

Low-sidelobe limited diffraction optical coherence tomography
Author(s): Jian-yu Lu; Jiqi Cheng; Brent D. Cameron
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Paper Abstract

Optical Coherence Tomography (OCT) is a relatively new type of imaging system for medical diagnosis. Because most current OCT systems use a sharply focused beam in tissues, they have a short depth of field (high image resolution is near the focus only). In this paper, limited diffraction beams of different orders are used to increase depth of field and to reduce sidelobes in OCT. Results show that the proposed OCT system has a lateral resolution of about 4.4 wavelengths (the central wavelength of the source is about 940 nm with a bandwidth of about 70 nm) and lower than -60 dB sidelobes over an entire depth of field of 4.5 mm with the diameter of the objective lens of 1 mm.

Paper Details

Date Published: 4 June 2002
PDF: 12 pages
Proc. SPIE 4625, Clinical Diagnostic Systems: Technologies and Instrumentation, (4 June 2002); doi: 10.1117/12.469788
Show Author Affiliations
Jian-yu Lu, Univ. of Toledo (United States)
Jiqi Cheng, Univ. of Toledo (United States)
Brent D. Cameron, Univ. of Toledo (United States)

Published in SPIE Proceedings Vol. 4625:
Clinical Diagnostic Systems: Technologies and Instrumentation
Gerald E. Cohn, Editor(s)

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