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Fabrication of a medium with controlled scattering coefficient by partially random distribution of voids in a transparent material.
Optical setup for measuring the output intensity distribution from the scattering medium by using a He–Ne laser source at a wavelength of 594 nm. NDF: neutral density filter.
(a) Photograph of fabricated scattering medium in PMMA and (b) output intensity distribution obtained in the setup of Fig. 2 when the void density was 33.06%.
The output beam width as a function of void density in the scattering medium.
Optical microscope images of fabricated voids (a) in one layer and (b) along the depth direction at 0.3 mm from the surface.
Calculated output beam widths as a function of (a) void density by using complex amplitude propagation and (b) scattering coefficient by Monte Carlo simulation.
Fabrication conditions of the scattering media.
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