One of the Approaches to Creating an Area Quasi-optical Illuminator in the Millimeter Wavelength Range
The article considers one of the approaches to the creation of an area quasi-optical illuminator of technical vision systems in the millimeter wavelength range. Along with the widely used X-ray radiation, millimeter-wave radiation, which represents its safer alternative in terms of exposure to living organisms, is promising for studying the internal structures of objects, searching for inhomogeneities and hidden defects of various structures. The approach of forming a radiation pattern in the near zone with parameters allowing to configure uniform illumination of a given area is presented. An original quasi-optical system has been developed that makes it possible to form a matrix camera adapted to the field of view, having a sensitive (active) rectangular surface, the configuration of the radiation diagram of the illuminator of the millimeter-range vision system using a quasi-optical system placed in the opening of a conical horn radiator, and thereby providing an increase in the efficiency of the emitted electromagnetic energy by the matrix camera. The results of simulation modeling and experimental study of the illuminator implemented using a quasi-optical system are presented. Based on the results of the work, ways to improve the characteristics of the obtained areal quasi-optical illuminator are formulated.
illuminator, directional pattern, millimeter wave range, radio vision, technical vision