Optical diffraction tomography (ODT) is a novel imaging technique in which a transparent object is illuminated from many different directions. The object's complex refractive index distribution is reconstructed digitally from the scattered field data by means of a reconstruction algorithm. Preliminary experimental results are presented for the imaging of an object whose refractive index and shape are known a priori. The results show that both the refractive index and the shape may be reconstructed accurately by the proposed ODT technique.
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