| 摘要 |
This invention relates to novel electronic devices for producing images such as of X-rays by means of electrical charges. The image the examined body or object is converted in a novel vacuum tube into a beam of electrons having the pattern of radiation image. This beam of electrons is converted next into electrical conductivity changes pattern which in turn modulates uniform electrical charges to produce the final image corresponding to original radiation image. In one embodiment of this invention the novel vacuum tube is provided with an image producing screen which exhibits electrical conductivity changes when bombarded by electrons. In one embodiment of this invention, two image producing screens are used, one of which is stationary and is affixed to wall of said vacuum tube and another one which is traveling outside of said tube. The stationary screen comprises layer of material exhibiting electrical conductivity changes when irradiated by said beam of electrons. The traveling film comprises a film of dielectric material which is inert to light which means is not light sensitive. In one embodiment of this invention the light inert traveling film is traveling within said tube and after the exposure to the outside of said tube. Means are also provided for advancing the traveling image producing screen to said vacuum tube and transporting it away from said tube to the means for developing and fixing said image of electrical charges. This invention will be especially useful for intensification of images formed by invisible radiations.
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