Inography imaging method and chamber

Details Inography imaging method and chamber Inography imaging method and chamber

1977-09-01

1979-11-20

Church, Craig E.

Radiant energy

Source with charged plate-type detector

2503151, B41M 500

Patent

active

041752325

ABSTRACT:
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 receives 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.

REFERENCES:
patent: 3828192 (1974-08-01), Morsell
patent: 4065670 (1977-12-01), Morsell
patent: 4074133 (1978-02-01), Muller

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