Doppler optical coherence tomography with a micro-electro-mechanical membrane mirror for high-speed dynamic focus tracking

Optics Letters
Victor YangDavid L Dickensheets

Abstract

An elliptical microelectromechanical system (MEMS) membrane mirror is electrostatically actuated to dynamically adjust the optical beam focus and track the axial scanning of the coherence gate in a Doppler optical coherence tomography (DOCT) system at 8 kHz. The MEMS mirror is designed to maintain a constant numerical aperture of approximately 0.13 and a spot size of approximately 6.7 microm over an imaging depth of 1mm in water, which improves imaging performance in resolving microspheres in gel samples and Doppler shift estimation precision in a flow phantom. The mirror's small size (1.4 mm x 1 mm) will allow integration with endoscopic MEMS-DOCT for in vivo applications.

Citations

May 3, 2011·Journal of Biomedical Optics·Cuiru SunVictor X D Yang
Jan 15, 2010·Physics in Medicine and Biology·Beau A StandishI Alex Vitkin
Feb 26, 2020·Micromachines·Guangcan ZhouGuangya Zhou
Mar 16, 2007·Applied Optics·Carla Carmelo RosaAdrian Podoleanu
Jun 24, 2011·Biomedical Optics Express·Dongkyun KangGuillermo J Tearney
Oct 19, 2017·Optics Express·Pauline BoucherNicolas Treps
Sep 17, 2008·Optics Letters·Alexandre Mermillod-BlondinCraig B Arnold
Nov 7, 2019·Optics Express·Zehao WangBin Zheng
Jan 1, 2013·Microsystem Technologies : Sensors, Actuators, Systems Integration·Chih-Hsien HuangJun Zou

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