High-luminosity light source

摘要

The present invention relates to a high-luminosity light source which comprises a body with a transparent screen having an electro-conductive layer applied thereon for supporting a luminophore. A planar cathode is mounted within the body, while a grid-type anode is placed between the screen and the cathode at a predetermined distance from the latter. The body is filled with a working gas consisting of an inert gas or a mixture of inert gases, while the anode and the cathode may be made of spray-resistant materials. The cathode may be made in the shape of a grid, while an additional screen having an electro-conductive layer applied thereon for supporting a luminophore is placed on the side of said cathode. A highly efficient photoluminophore may be used as the luminophore, while the working-gas pressure and the excitation parameters are optimally selected for excitation of the ultraviolet radiation of the working gas. Unlike light sources used in prior art, the luminophore is excited by electrons originating from a secondary emission, thus producing strong currents of electron beams and a high luminosity. This construction may also be used to provide sources with a large surface area. The light source of the present invention is an efficient one with a high intensity.