12 Jan 2020
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Anand Vijayakumar
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Katkus Tomas
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Linklater Denver
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Ivanova Elena P
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Juodkazis Saulius
Detection of phase variations across optically transparent samples is often a
difficult task. We propose and demonstrate a compact, lightweight and low cost
quantitative phase contrast imager...Light diffracted from a pinhole is incident
on a thick object and the modulated light is collected by an image sensor and
the intensity pattern is recorded. Two optical configurations namely lens-based
and lensless cases are compared. A modified phase-retrieval algorithm is
implemented to extract the phase information of the sample at different axial
planes from a single camera shot.(read more)