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(a) Configuration of the high-speed optical-resolution photoacoustic microscopy (OR-PAM) system. (b) Optical paths of the two lasers as the MEMS scanner moves. (c) Fully synchronized timing diagram. MEMS, microelectromechanical system; FM, flat mirror; DM, dichroic mirror; FC, fiber collimator; RC, reflective collimator; OL, objective lens; UT, ultrasound transducer; CRL, correction lens; OUC, opto-ultrasound beam combiner; ACL, acoustic lens.
