A 5mm catheter for constant resolution probing in Fourier domain optical coherence endoscopy

Kye-Sung Lee; Lei Wu; Huikai Xie; Olusegun Ilegbusi; Marco Costa; Jannick P. Rolland

doi:10.1117/12.711122

12 February 2007 A 5mm catheter for constant resolution probing in Fourier domain optical coherence endoscopy

Kye-Sung Lee, Lei Wu, Huikai Xie, Olusegun Ilegbusi, Marco Costa, Jannick P. Rolland

Proceedings Volume 6432, Endoscopic Microscopy II; 64320B (2007) https://doi.org/10.1117/12.711122
Event: SPIE BiOS, 2007, San Jose, California, United States

Abstract

A 5mm biophotonic catheter was conceived for optical coherence tomography (OCT) with collimation optics, an axicon lens, and custom design imaging optics, yielding a 360 degree scan aimed at imaging within concave structures such as lung lobes. In OCT a large depth of focus is necessary to image a thick sample with a constant high transverse resolution. There are two approaches to achieving constant lateral resolution in OCT: Dynamic focusing or Bessel beam forming. This paper focuses on imaging with Bessel beams. A Bessel beam can be generated in the sample arm of the OCT interferometer when axicon optics is employed instead of a conventional focusing lens. We present a design for a 5mm catheter that combines an axicon lens with imaging optics and the coupling of a MEMS mirror attached to a micromotor that allow 360 degree scanning with a resolution of about 5 microns across a depth of focus of about 1.2mm.

Citation Download Citation

Kye-Sung Lee, Lei Wu, Huikai Xie, Olusegun Ilegbusi, Marco Costa, and Jannick P. Rolland "A 5mm catheter for constant resolution probing in Fourier domain optical coherence endoscopy", Proc. SPIE 6432, Endoscopic Microscopy II, 64320B (12 February 2007); https://doi.org/10.1117/12.711122

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