Endoscope two dimensional scanning fiber probe and the driving method

Guangping Li; He Gao; Ai Zhou; Zhihai Liu

doi:10.1117/12.905054

22 November 2011 Endoscope two dimensional scanning fiber probe and the driving method

Guangping Li, He Gao, Ai Zhou, Zhihai Liu

Proceedings Volume 8199, 2011 International Conference on Optical Instruments and Technology: Optical Sensors and Applications; 819913 (2011) https://doi.org/10.1117/12.905054
Event: International Conference on Optical Instruments and Technology (OIT2011), 2011, Beijing, Beijing, China

Abstract

We design and fabricate an endoscope scanning fiber probe based on the piezoelectric transducer (PZT) for optical coherence tomography (OCT) to perform two-dimensional scanning. The driving part of the optical fiber probe is composed of two piezoelectric ceramics and a thin conductive substrate. The optical fiber is fixed in the middle of the piezoelectric ceramics to form a configuration of cantilever. A sine wave is employed for driving the PZT to make the cantilever vibrate along the vertical direction and form a line scanning. A saw tooth wave is load on the PZT to make the cantilever vibrate along the horizontal direction and form the field scanning. The frequency of the sine wave is set to be close to the resonance frequency of the fiber cantilever to increase the scanning range, whereas the frequency of the saw tooth wave is much lower than the resonance frequency to avoid the generation of blind spots. The finite element model is established for the theorical analysis of the device. Experimental results show that the scanning range can reach to 500x500 μm, and the scanning range can be adjusted by changing the amplitude of the drive signals.

Citation Download Citation

Guangping Li, He Gao, Ai Zhou, and Zhihai Liu "Endoscope two dimensional scanning fiber probe and the driving method", Proc. SPIE 8199, 2011 International Conference on Optical Instruments and Technology: Optical Sensors and Applications, 819913 (22 November 2011); https://doi.org/10.1117/12.905054

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