Quasi-optical diffraction tomography

Tomographical methods of image reconstruction of two-dimensional cross-sections of volumetric objects in the millimeter wavelength band are suggested and considered. Experimental images obtained using antennas of dielectric type and radiation frequency f≈136 GHz are represented. Volumetric dielectric objects have been taken as objects under investigation. It is shown that in the frequency band under consideration, the images of investigated objects with characteristic dimension A≈7λ÷15λ may be obtained by first-order diffraction tomography method (Born, Rytov or high frequency approximation of the first-order for scattered electromagnetic fields)