Fig. 1From: Hybrid optical parametrically-oscillating emitter at 1930 nm for volumetric photoacoustic imaging of water contenta Schematic diagram of the hybrid optical parametrically-oscillating emitter (HOPE) at 1930 nm. b Optical-resolution photoacoustic microscopy (OR-PAM). Col: collimator; M: mirror; Obj: Objective lens; UST: ultrasonic transducer; Amp: RF amplifier; DAQ: data acquisition card; PC: personal computer.Back to article page