2mm catheter design for endoscopic optical coherence tomography

Kye-Sung Lee; Chuck Koehler; Eric G. Johnson; Eric Valaski Teuma; Olusegun Ilegbusi; Marco Costa; Huikai Xie; Jannick P. Rolland

doi:10.1117/12.692203

22 July 2006 2mm catheter design for endoscopic optical coherence tomography

Kye-Sung Lee, Chuck Koehler, Eric G. Johnson, Eric Valaski Teuma, Olusegun Ilegbusi, Marco Costa, Huikai Xie, Jannick P. Rolland

Author Affiliations +

Proceedings Volume 6342, International Optical Design Conference 2006; 63420F (2006) https://doi.org/10.1117/12.692203
Event: International Optical Design Conference 2006, 2006, Vancouver, BC, Canada

Abstract

A biophotonics catheter was conceived with collimation optics, an axicon lens, and custom design imaging optics yielding a 360 degree scan aimed at imaging within concave structures such as arteries and lung lobes. The large depth of focus is necessary to image a long-depth-range sample with constant transverse resolution in optical coherence tomography (OCT). There are two approaches to achieving constant invariant resolution in OCT: Dynamic focusing or Bessel beam formation. This paper focuses on imaging with Bessel beams. The Bessel beams may be created with axicon optics which can be used instead of a conventional focusing lens in the sample arm of the OCT interferometer. In this paper we present the design of a 2mm catheter for optical coherence endoscopy with resolution of about 5 micron across a depth of focus of about 1.6mm. Importantly, we investigated the fabrication of a 800μm diameter axicon lens and the associated lateral resolution obtained over a long depth range in our OCT system, compared to the same OCT system using a conventional lens.

Citation Download Citation

Kye-Sung Lee, Chuck Koehler, Eric G. Johnson, Eric Valaski Teuma, Olusegun Ilegbusi, Marco Costa, Huikai Xie, and Jannick P. Rolland "2mm catheter design for endoscopic optical coherence tomography", Proc. SPIE 6342, International Optical Design Conference 2006, 63420F (22 July 2006); https://doi.org/10.1117/12.692203

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