Two dimensional scanning probe using off-axis magnetic force of single solenoid for 3D OCT imaging

Eun Jung Min; Jun Geun Shin; Yuri Kim; Byeong Ha Lee

doi:10.1117/12.874367

23 February 2011 Two dimensional scanning probe using off-axis magnetic force of single solenoid for 3D OCT imaging

Eun Jung Min, Jun Geun Shin, Yuri Kim, Byeong Ha Lee

Proceedings Volume 7904, Three-Dimensional and Multidimensional Microscopy: Image Acquisition and Processing XVIII; 79041N (2011) https://doi.org/10.1117/12.874367
Event: SPIE BiOS, 2011, San Francisco, California, United States

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.

Citation Download Citation

Eun Jung Min, Jun Geun Shin, Yuri Kim, and Byeong Ha Lee "Two dimensional scanning probe using off-axis magnetic force of single solenoid for 3D OCT imaging", Proc. SPIE 7904, Three-Dimensional and Multidimensional Microscopy: Image Acquisition and Processing XVIII, 79041N (23 February 2011); https://doi.org/10.1117/12.874367

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