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- W1975590976 abstract "Angular Domain Imaging (ADI) is a high resolution, ballistic imaging method that utilizes the angular spectrum ofphotons to filter multiply-scattered photons which have a wide distribution of angles from ballistic and quasi-ballisticphotons which exit a scattering medium with a small distribution of angles around their original trajectory. Anadvantage of the ADI method is that it is suitable with a wide variety of light sources, as it is not sensitive to coherenceor wavelength and does not require a pulsed source or a highly collimated beam. We extend the ADI method totransmissive imaging of scattering media using incoherent, collimated sources with a spatial filter comprised of aconverging lens (focal distance of 50 to 100 mm) and pinhole aperture (diameter of 100 to 500 μm) giving acceptancesangles of 0.06 to 0.6° to produce wide-beam, full-field images of planar, high contrast, phantom test objects through 5cm thick scattering media at optical depths of up to 14.6 (scattered to ballistic photon ratio ≈ 2×106). Experimentalimages, obtained using a 12 mm diameter beam produced by a quartz-halogen incandescent source (beam divergenceangle 0.52°, beam power < 10 mW), demonstrate the advantages of this combination of broadband, incoherent sourceand spatial filter: lack of interference artifacts seen with laser sources, ease of changing image magnification, simplecorrelation between system geometry and resolution, and ease of spectral filtration to obtain multispectral images.Monte Carlo simulation with angular tracking is used to validate the experimental results and determine system tradeoffs." @default.
- W1975590976 created "2016-06-24" @default.
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- W1975590976 date "2010-02-11" @default.
- W1975590976 modified "2023-09-23" @default.
- W1975590976 title "Optical imaging of structures within highly scattering material using an incoherent beam and a spatial filter" @default.
- W1975590976 doi "https://doi.org/10.1117/12.843286" @default.
- W1975590976 hasPublicationYear "2010" @default.
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