U.S. Philips Corporation

Hans-Jurgen Hirsch

Horst Dannert

Kristian Peschmann

Hans-Georg Junginger

Ewald Klein

Karl-Heinz Panstruga

An electroradiographic display with a high picture quality at low radiation intensities is obtained with a device consisting of a source of X-rays, an electrode passing X-rays, an intermediate recording space for an object to be displayed, an electrode on the side remote from the recording space on which a layer of dielectric material is disposed, and a second electrode with a photoconductive layer. The layers are separated by a gas gap which is bounded by one or more side walls. A direct voltage source is in electrical contact with the electrodes. The photoconductive layer comprises a granular photoconductive material in a binder. The gas gap between the dielectric layer and the photoconductive layer is from 50 to 500 .mu.m wide and the electrode passing X-rays has a surface resistance between 10.sup.3 to 10.sup.8 Ohms.

Electroradiographic recording device

The sensitivity of photoconductive layers of tetragonal lead monoxide in a binder is increased when the tetragonal lead monoxide produced by prior art process after being subjected to a further treatment has a grain size of 1 to 50 .mu.m and is dispersed in the binder without mechanical force and is sedimented on a layer carrier without mechanical force.

X-ray electrophotographic recording material and method of manufacturing

An x-ray exposure device comprising a flat and plane rectangular chamber containing an ionizable gas and having walls provided with electrode structures which generate a potential distribution corresponding to that of two concentric spherical electrodes, an insulating foil on which charge carriers resulting from ionization of the gas by the x-radiation and displaceable in the longitudinal direction of the chamber being arranged therewithin.

Growing community of inventors

Selfkant-Tuddern, Germany

Hans-Jurgen Hirsch