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Proceedings Paper

Design optimization and implementation of a miniature optical coherence tomography probe based on a MEMS mirror
Author(s): Donglin Wang; Linlai Fu; Jingjing Sun; Hongzhi Jia; Huikai Xie
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Paper Abstract

Optical coherence tomography (OCT) provides non-invasive cross-sectional imaging capability and high resolution, but it has very limited applications inside human body because of the stringent size requirements for accessing the internal organs. Micro-Electro-Mechanical Systems (MEMS) is an emerging technology that can make devices with small size and fast speed. This paper reports the design optimization of a MEMS mirror-based miniature OCT probe. The probe consists of three main parts: a GRIN lens module (1.3 mm in diameter), a MEMS mirror (1.7 mm x 1.55 mm), and a stainless steel mount. A special assembly holder is designed for easy placement of parts and accurate optical alignment and real-time monitoring of optical alignment and electrical characteristics is also used to the assembly process. Code V is used for the optical design and analysis. Simulation shows that the changes of the spot size and focal length are within the acceptable range when the distance between the optical fiber and the GRIN lens varies less than 0.1 mm. The fiber may tilt as much as 2.5 degrees without any considerable change of the spot size and working distance. The maximum tolerance to the lateral shift between the fiber and GRIN lens is about 0.1 mm.

Paper Details

Date Published: 8 September 2011
PDF: 10 pages
Proc. SPIE 8191, International Symposium on Photoelectronic Detection and Imaging 2011: Sensor and Micromachined Optical Device Technologies, 81910M (8 September 2011); doi: 10.1117/12.899645
Show Author Affiliations
Donglin Wang, Univ. of Shanghai for Science and Technology (China)
WiO Technology Co., Ltd. (China)
Linlai Fu, WiO Technology Co., Ltd. (China)
Jingjing Sun, Univ. of Florida (United States)
Hongzhi Jia, Univ. of Shanghai for Science and Technology (China)
Huikai Xie, WiO Technology Co., Ltd. (China)
Univ. of Florida (United States)


Published in SPIE Proceedings Vol. 8191:
International Symposium on Photoelectronic Detection and Imaging 2011: Sensor and Micromachined Optical Device Technologies

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