Low-sidelobe limited diffraction optical coherence tomography

Jian-yu Lu; Jiqi Cheng; Brent D. Cameron

doi:10.1117/12.469788

4 June 2002 Low-sidelobe limited diffraction optical coherence tomography

Jian-yu Lu, Jiqi Cheng, Brent D. Cameron

Proceedings Volume 4625, Clinical Diagnostic Systems: Technologies and Instrumentation; (2002) https://doi.org/10.1117/12.469788
Event: International Symposium on Biomedical Optics, 2002, San Jose, CA, United States

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.

Citation Download Citation

Jian-yu Lu, Jiqi Cheng, and Brent D. Cameron "Low-sidelobe limited diffraction optical coherence tomography", Proc. SPIE 4625, Clinical Diagnostic Systems: Technologies and Instrumentation, (4 June 2002); https://doi.org/10.1117/12.469788

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