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Spatially Fourier-encoded photoacoustic microscopy using a digital micromirror device

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Abstract

We have developed spatially Fourier-encoded photoacoustic (PA) microscopy using a digital micromirror device. The spatial intensity distribution of laser pulses is Fourier-encoded, and a series of such encoded PA measurements allows one to decode the spatial distribution of optical absorption. The throughput and Fellgett advantages were demonstrated by imaging a chromium target. By using 63 spatial elements, the signal-to-noise ratio in the recovered PA signal was enhanced by 4×. The system was used to image two biological targets, a monolayer of red blood cells and melanoma cells.

© 2014 Optical Society of America

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