Piezoelectric scanning mirrors for endoscopic optical coherence tomography

被引：44
作者：
Gilchrist, Kristin H. [1 ]
McNabb, Ryan P. [2 ,3 ]
Izatt, Joseph A. [2 ,3 ]
Grego, Sonia [1 ]
机构：
[1] RTI Int, Ctr Mat & Elect Technol, Res Triangle Pk, NC 27709 USA
[2] Duke Univ, Dept Biomed Engn, Durham, NC 27708 USA
[3] Duke Univ, Fitzpatrick Inst Photon, Durham, NC 27708 USA
来源：
JOURNAL OF MICROMECHANICS AND MICROENGINEERING | 2009年 / 19卷 / 09期
关键词：
HIGH-SPEED; SWEPT SOURCE; CATHETER; PZT; INTERFEROMETER; MICROSCOPY; ACTUATORS; DRIVEN;
D O I：
10.1088/0960-1317/19/9/095012
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
A novel piezoelectric scanning mirror design for endoscopic optical coherence tomography (OCT) is presented. OCT is an interferometric technique providing microscopic tomographic sectioning of biological samples with mm-range penetration capability in tissue and is suited for integration with endoscopes using fiber-based light delivery to the sample. The piezoelectric scanning mirror was designed to provide wide-range rapid forwarding-looking scanning of the optical beam at the distal end of a compact catheter. The optical scanner provides a large ratio of mirror aperture to device size with rectangular mirror sizes ranging from 600 mu m x 840 mu m to 840 mu m x 1600 mu m. Static angular displacements up to +/-7 degrees (mechanical angle) were demonstrated and resonance frequencies of hundreds of Hz (and up to 1-2 kHz) were measured, depending on the mirror size. The imaging capability of the piezoelectric scanner was demonstrated using a bench-top spectrometer-based Fourier-domain OCT system.
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页数：11
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