Patent Number: 053894731
Section: claims

1. A method of producing an X-ray grid, comprising the steps of providing a monolithic panel of a photosensitive material;  exposing the panel through a masking device to produce in the panel a hidden image;  developing the hidden image in the panel by a thermal treatment;  etching the photosensitive monolithic panel after said developing so as to form a monolithic grate with a plurality of cells with partitions therebetween; and  covering the partitions with an X-ray absorbing material,  said providing including using as the photosensitive material a photosensitive glass with a differential of solubility not less than 25, and  said exposing including exposing with a radiation having a wavelength which is shorter than a wavelength of an ultraviolet radiation. 2. A method as defined in claim 1, wherein said developing includes heating the panel to a temperature substantially equal to 450.degree.-700.degree. C. 3. A method as defined in claim 1, wherein said exposing includes exposing with X-ray radiation. 4. A method as defined in claim 1, wherein said exposing includes exposing with gamma radiation. 5. A method as defined in claim 1; and further comprising the step of covering opposite transverse sides of the panel with covers composed of an X-ray transmitting material. 6. A method as defined in claim 1, wherein said covering with an X-ray absorbing material includes covering with X-ray absorbing material all surfaces of said monolithic panel including inner surfaces of said cells.