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Proceedings Paper

Two dimensional scanning probe using off-axis magnetic force of single solenoid for 3D OCT imaging
Author(s): Eun Jung Min; Jun Geun Shin; Yuri Kim; Byeong Ha Lee
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Paper Abstract

We propose a single piece optical fiber-based two-dimensional scanning hand-held probe suitable for three-dimensional optical coherence tomography. The probe consists of only a single piece of optical fiber loaded with a bead of ferromagnetic material, which acts as a vibrating cantilever. The fiber cantilever is two dimensionally actuated with a single miniaturized solenoid. For effective beam focusing, a fiber lens is formed at the end of the fiber. The inductance and input current of the solenoid were 100 μH and 216 mA, respectively. The iron-bead on the fiber is located at the off-axis of solenoid for two-dimensional scanning. Then, by modulating the input current to the solenoid, it was possible to mechanically oscillate the fiber cantilever in an elliptically spiral pattern. With the proposed probe, 2-dimensional scanning could be experimentally achieved in a rate of 4 s/vortex across a scanning area of approximately 30 mm2, which could be controlled with the length of the fiber or/and the weight of the iron-bead. Three-dimensional tomographic image of a coin was successfully obtained with the spectral domain optical coherence tomography equipped with the proposed scanner. It is expected that the scheme of 2-dimentional scanning with a single actuator might be useful in various real-time imaging applications including OCT owing to the advantages of low cost, low power consumption, simple fabrication process and versatile design.

Paper Details

Date Published: 23 February 2011
PDF: 7 pages
Proc. SPIE 7904, Three-Dimensional and Multidimensional Microscopy: Image Acquisition and Processing XVIII, 79041N (23 February 2011); doi: 10.1117/12.874367
Show Author Affiliations
Eun Jung Min, Gwangju Institute of Science and Technology (Korea, Republic of)
Jun Geun Shin, Gwangju Institute of Science and Technology (Korea, Republic of)
Yuri Kim, Gwangju Institute of Science and Technology (Korea, Republic of)
Byeong Ha Lee, Gwangju Institute of Science and Technology (Korea, Republic of)


Published in SPIE Proceedings Vol. 7904:
Three-Dimensional and Multidimensional Microscopy: Image Acquisition and Processing XVIII
Jose-Angel Conchello; Carol J. Cogswell; Tony Wilson; Thomas G. Brown, Editor(s)

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