Computational three-dimensional imaging with near infrared synchrotron beam using Fresnel zone apertures fabricated on barium fluoride windows using femtosecond laser ablation

Daniel Smith; Molong Han; Soon Hock Ng; Tomas Katkus; Aravind Simon John Francis Rajeswary; Mark J. Tobin; Jitraporn Vongsvivut; Saulius Juodkazis; Vijayakumar Anand

doi:10.1117/12.2655172

8 March 2023 Computational three-dimensional imaging with near infrared synchrotron beam using Fresnel zone apertures fabricated on barium fluoride windows using femtosecond laser ablation

Daniel Smith, Molong Han, Soon Hock Ng, Tomas Katkus, Aravind Simon John Francis Rajeswary, Mark J. Tobin, Jitraporn Vongsvivut, Saulius Juodkazis, Vijayakumar Anand

Author Affiliations +

Proceedings Volume 12445, Practical Holography XXXVII: Displays, Materials, and Applications; 124450Y (2023) https://doi.org/10.1117/12.2655172
Event: SPIE OPTO, 2023, San Francisco, California, United States

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Abstract

The near infrared (NIR) part of the infrared synchrotron beam is usually discarded to improve the signal to noise ratio of spectral imaging at the Australian Synchrotron. In this study, NIR synchrotron beam has been extracted and used for three-dimensional (3D) imaging. A Fresnel zone aperture (FZA) was fabricated on barium fluoride windows using femtosecond ablation. The 3D point spread functions (PSFs) were recorded using the FZA mounted between the pinhole and the image sensor. An object is then placed within the boundaries of the PSF library and an object intensity distribution was recorded. Computational reconstruction methods were applied to reconstruct the object information.

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Daniel Smith, Molong Han, Soon Hock Ng, Tomas Katkus, Aravind Simon John Francis Rajeswary, Mark J. Tobin, Jitraporn Vongsvivut, Saulius Juodkazis, and Vijayakumar Anand "Computational three-dimensional imaging with near infrared synchrotron beam using Fresnel zone apertures fabricated on barium fluoride windows using femtosecond laser ablation", Proc. SPIE 12445, Practical Holography XXXVII: Displays, Materials, and Applications, 124450Y (8 March 2023); https://doi.org/10.1117/12.2655172

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