Ionography imaging method and chamber

Details Ionography imaging method and chamber Ionography imaging method and chamber

G - Physics

03

G

358/11

G03G 13/00 (2006.01) G03G 15/054 (2006.01)

Patent

CA 1090007

ABSTRACT OF THE DISCLOSURE An ionography imaging chamber wherein the sections of the pressure vessel carry concentric spherical electrodes centered at the source of X-rays and defining a spherical interelectrode gap. A dielectric receptor sheet is converted into a portion of a hollow cylinder during introduction into the gap and its marginal portions are thereupon biased against one of the sections by an inflatable gasket which seals the gap from the surrounding atmosphere prior to admission of compressed high Z gas. The admitted gas deforms the sheet against the electrode which is nearer to the source of X-rays while the gas at the rear side of the sheet is allowed to escape by way of ports in the respective section. If the gap re- ceives two sheets at a time, the admission of high Z gas takes place between the sheets so that each sheet overlies and closely follows the outline of the corresponding electrode. The two sheets may constitute discrete sheets or overlapping portions of a single sheet which is trained over a roller at a locus remote from the point of introduction of the sheet into the pressure vessel. Simultaneous exposure of both sheets to object-modulated X-rays results in the making of positive and negative latent images of the object. -1-

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