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7 March 2022 Towards high-speed camera-based parallelized widefield photoacoustic remote sensing microscopy
Nathaniel J. M. Haven, Matthew T. Martell, Haoyang Li, James D. Hogan, Roger J. Zemp, Brendon S Restall
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Proceedings Volume PC11960, Photons Plus Ultrasound: Imaging and Sensing 2022; PC119602C (2022) https://doi.org/10.1117/12.2610350
Event: SPIE BiOS, 2022, San Francisco, California, United States
Abstract
Photoacoustic remote sensing (PARS) microscopy suffers from slow imaging speeds as a result of so far being an exclusively laser scanning microscopy-based technique. Here we introduce a camera-based PARS approach using a 10 million frames-per-second camera together with oblique 532nm excitation and white-light interrogation. 2mm x 1.2mm images of 20µm diameter gold bonding wires are obtained in fractions of a second albeit with lower resolution. Using these wide-field images, regions-of-interest can be established. Additionally, the observation of supersonic wavefronts suggest the generation of shockwaves. This observation is used to derive an empirical model for the time evolution of PARS signals.
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Nathaniel J. M. Haven, Matthew T. Martell, Haoyang Li, James D. Hogan, Roger J. Zemp, and Brendon S Restall "Towards high-speed camera-based parallelized widefield photoacoustic remote sensing microscopy", Proc. SPIE PC11960, Photons Plus Ultrasound: Imaging and Sensing 2022, PC119602C (7 March 2022); https://doi.org/10.1117/12.2610350
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KEYWORDS
Cameras
Microscopy
High speed cameras
Photoacoustic spectroscopy
Remote sensing
Fiber optic illuminators
Image resolution
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