Browsing by Author "Katkus, TA"

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    Three-dimensional phase imaging with near infrared synchrotron beam using phase-retrieval algorithm
    (Society of Photo-Optical Instrumentation Engineers (SPIE), 2023-03-08) Han, M; Smith, D; Ng, SH; Katkus, TA; Simon, A; Rajeswary, JF; Praveen, PA; Tobin, MJ; Vongsvivut, JP; Juodkazis, S; Anand, V
    The near infrared (NIR) part of the infrared synchrotron beam is usually dumped to improve the signal to noise ratio of spectral imaging. In this study, this NIR synchrotron beam has been extracted and used for three-dimensional (3D) phase imaging. A pinhole was inserted in the path of the fork shaped NIR synchrotron beam and the Airy diffraction pattern was aligned with biochemical samples and the diffracted intensity distribution was captured using an image sensor sensitive to NIR. A phase retrieval algorithm was used to estimate the 3D phase distribution at the object plane from the recorded intensity distribution. © (2023) Society of Photo-Optical Instrumentation Engineers (SPIE)