18 June 2018 Image formation in trans-illumination interferometry
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We are interested in finding the regions where the trans-illumination diagnostic beam indicates some kind of change and interpret it potentially as anomaly. Upon simulation we found that the trans-illuminated signal may be measured on axis even when the sample is too thick (dμs=10) to permit trans-illumination with ballistic photons. Assuming a single scattering case, corresponding to a weakly scattering sample that is in the literature simulated as a flesh of a chicken breast, we find that even a small aperture transmits signal that may be used to identify sample differentiation. We show the spreading of the trans-illuminated signal that clearly depends on the depth of anomaly, allowing determination of its position. Upon scanning of the probe beam, changes in transillumination delineate the transverse extend of the anomaly. Our simulations agree with published results.
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M. Strojnik, M. Strojnik, M. K. Scholl, M. K. Scholl, M. S. Kirk, M. S. Kirk, } "Image formation in trans-illumination interferometry", Proc. SPIE 10695, Optical Instrument Science, Technology, and Applications, 1069508 (18 June 2018); doi: 10.1117/12.2315440; https://doi.org/10.1117/12.2315440

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