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Proceedings Paper

Ultraminiature video-rate forward-view spectrally encoded endoscopy with straight axis configuration
Author(s): Zhuo Wang; Tzu-Yu Wu; Mark A. Hamm; Alexander Altshuler; Anderson T. Mach; Donald I. Gilbody; Bin Wu; Santosh N. Ganesan; James P. Chung; Mitsuhiro Ikuta; Jacob S. Brauer; Seiji Takeuchi; Tokuyuki Honda
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Paper Abstract

As one of the smallest endoscopes that have been demonstrated, the spectrally encoded endoscope (SEE) shows potential for the use in minimally invasive surgeries. While the original SEE is designed for side-view applications, the forwardview (FV) scope is more desired by physicians for many clinical applications because it provides a more natural navigation. Several FV SEEs have been designed in the past, which involve either multiple optical elements or one optical element with multiple optically active surfaces. Here we report a complete FV SEE which comprises a rotating illumination probe within a drive cable, a sheath and a window to cover the optics, a customized spectrometer, hardware controllers for both motor control and synchronization, and a software suite to capture, process and store images and videos. In this solution, the optical axis is straight and the dispersion element, i.e. the grating, is designed such that the slightly focused light after the focusing element will be dispersed by the grating, covering forward view angles with high diffraction efficiencies. As such, the illumination probe is fabricated with a diameter of only 275 μm. The twodimensional video-rate image acquisition is realized by rotating the illumination optics at 30 Hz. In one finished design, the scope diameter including the window assembly is 1.2 mm.

Paper Details

Date Published: 15 February 2017
PDF: 11 pages
Proc. SPIE 10040, Endoscopic Microscopy XII, 100400M (15 February 2017); doi: 10.1117/12.2253020
Show Author Affiliations
Zhuo Wang, Canon USA, Inc. (United States)
Tzu-Yu Wu, Canon USA, Inc. (United States)
Mark A. Hamm, Canon USA, Inc. (United States)
Alexander Altshuler, Canon USA, Inc. (United States)
Anderson T. Mach, Canon USA, Inc. (United States)
Donald I. Gilbody, Canon USA, Inc. (United States)
Bin Wu, Canon USA, Inc. (United States)
Santosh N. Ganesan, Canon USA, Inc. (United States)
James P. Chung, Canon USA, Inc. (United States)
Mitsuhiro Ikuta, Canon USA, Inc. (United States)
Jacob S. Brauer, Canon USA, Inc. (United States)
Seiji Takeuchi, Canon USA, Inc. (United States)
Tokuyuki Honda, Canon USA, Inc. (United States)

Published in SPIE Proceedings Vol. 10040:
Endoscopic Microscopy XII
Guillermo J. Tearney M.D.; Thomas D. Wang, Editor(s)

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