Abstract: A method for generating radiation in a range of desired wavelengths in a direction of emission is provided. According to the method, initial radiation is produced by a radiation source, the wavelengths thereof including the desired range, and the initial radiation is filtered in such a way as to substantially eliminate the initial radiation beams having a wavelength outside the desired range. The inventive method is characterized in that the filtering is carried out by setting up a controlled distribution of the refractive index of the beams in a control region through which the initial radiation passes, in such a way as to selectively deviate the beams of the initial radiation according to the wavelength thereof and to recover the beams having desired wavelengths. The invention also relates to an associated device.

Abstract: A process and related apparatus for generating an output radiation through an output aperture, including generating pulsed radiations by a plurality of radiation sources, each source being arranged for respectively (i) generating within a respective plasma a respective pulsed elementary radiation whose wavelengths include a respective desired range, and (ii) directing rays of its respective elementary radiation on the output aperture. For each source, refractive indices of rays are distributed in a respective control region through which its respective elementary radiation passes and located in its respective plasma, to selectively deviate rays of its respective elementary radiation as a function of their wavelength, and temporally multiplexing the radiation sources to obtain at the output aperture the output radiation.

Abstract: A radiology device includes an X-ray source for exposing a subject to the radiation of said source, a converter for converting the X-rays into optical images so as to form primary optical images, a transformer for transforming the primary optical images into secondary optical images, and a display for displaying the secondary images to a user. The transformer includes an optical chain including, in succession, from the output of the converter to the output of the device, an image enlargement assembly exposed directly to the primary images from the converter, an assembly for optical intensification of the enlarged images, and a photosensitive matrix sensor for making the secondary images.