Abstract: A device comprise input 6 and output 8 end faces connected with a multitude of channels for transportation of an optical radiation with reflection from their walls. Through the central channels radiation may be transported without reflections. Continuations of the inlet 7 and outlet 9 ends of the channels beyond the input and output end faces of the device are oriented in such a way that in aggregate have shape of input flux of optical radiation perceived by the device, and required output flux, correspondingly. At that, one or both of end faces of the device, except for the inlet and outlet openings of the channels, have non-transparent coating, or the walls of the channels and medium between the channels are non-transparent. When continuations of longitudinal axes of the channels from the side of input and output end faces intersect in points located on continuation of the longitudinal axis of the device, it will be able to focus divergent flux of optical radiation from quasipoint source.