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 . The MEMS mirror is designed to maintain a constant numerical aperture of and a spot size of over an imaging depth of 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 will allow integration with endoscopic MEMS-DOCT for in vivo applications.
© 2006 Optical Society of America
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