Spatially and temporally resolution enhanced, all-optical, localized, non-contact and photoacoustic imaging

Matan Benyamin; Zeev Zalevsky

doi:10.1117/12.3009031

13 March 2024 Spatially and temporally resolution enhanced, all-optical, localized, non-contact and photoacoustic imaging

Matan Benyamin, Zeev Zalevsky

Author Affiliations +

Proceedings Volume PC12854, Label-free Biomedical Imaging and Sensing (LBIS) 2024; PC128540H (2024) https://doi.org/10.1117/12.3009031
Event: SPIE BiOS, 2024, San Francisco, California, United States

Abstract

In this presentation we will present an all-optical pump-probe approach for non-contact photo-acoustic sensing and imaging. We will show various configurations for enhancing the obtainable spatial and temporal resolution as well as usage of the proposed sensing technique for various important applications. The presented pump-probe approach allows localized and direct technique for performing photoacoustic imaging while the focused pump beam excites the acoustic signal, and a focused probe beam does the spatial-temporal analysis of the diffracted speckle patterns. This analysis is done in one configuration by analyzing time changing contrast of the time varying speckle patterns and in another sensing configuration, where the speckle pattern do not vary but rather laterally move, by tracking the position of the correlation peak. Due to its advantage of performing localized photo-acoustic sensing, the proposed concept can allow sensing in solutions or other mediums typically problematic for conventional transducers-based photo-acoustic sensing.

Conference Presentation

Citation Download Citation

Matan Benyamin and Zeev Zalevsky "Spatially and temporally resolution enhanced, all-optical, localized, non-contact and photoacoustic imaging", Proc. SPIE PC12854, Label-free Biomedical Imaging and Sensing (LBIS) 2024, PC128540H (13 March 2024); https://doi.org/10.1117/12.3009031

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