MEMS motor-based common-path endoscopic Fourier-domain OCT

Rui Wang; Julie X. Yun; Xiaocong Yuan; Bo Li; Richard Goodwin; Roger Markwald; Bruce Gao

doi:10.1117/12.875322

22 February 2011 MEMS motor-based common-path endoscopic Fourier-domain OCT

Rui Wang, Julie X. Yun, Xiaocong Yuan, Bo Li, Richard Goodwin, Roger Markwald, Bruce Gao

Proceedings Volume 7893, Endoscopic Microscopy VI; 78930Z (2011) https://doi.org/10.1117/12.875322
Event: SPIE BiOS, 2011, San Francisco, California, United States

Abstract

A rotational microelectromechanical(MEMS) motor based common-path Fourier-domain OCT for endoscopic imaging, which uses the interface between the index-match oil and distal-end surface of the fiber as a self-aligned reference mirror, is reported. The reference intensity is easy to be tuned by altering the index of the match oil to optimize the signal to noise ratio of the system. An external Michelson interferometer is used to compensate for the optical path difference and dispersion mismatch to the index-match oil and the GRIN lens. Due to this common-path design, the OCT signal is immune to bending or stretching of the endoscopic catheter. The outer diameter of the probe is 3 mm, and 22 circumferential-scans and 50,000 lines A-scans are obtained in one second.

Citation Download Citation

Rui Wang, Julie X. Yun, Xiaocong Yuan, Bo Li, Richard Goodwin, Roger Markwald, and Bruce Gao "MEMS motor-based common-path endoscopic Fourier-domain OCT", Proc. SPIE 7893, Endoscopic Microscopy VI, 78930Z (22 February 2011); https://doi.org/10.1117/12.875322

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KEYWORDS

Optical coherence tomography

Endoscopy

GRIN lenses

Michelson interferometers

Microelectromechanical systems

Imaging systems

Mirrors

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