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XERORADIOGRAPHIC ELECTROMETER SCAN EXPOSURE

IP.com Disclosure Number: IPCOM000023909D
Original Publication Date: 1979-Apr-30
Included in the Prior Art Database: 2004-Apr-01
Document File: 2 page(s) / 242K

Publishing Venue

Xerox Disclosure Journal

Abstract

A xeroradiographic system for scanning the charged surface 2 of a xeroradiographic plate 1 after exposure of an object 3 to penetrating radiation 4- The plate surface 2 is positioned away from the source 5 of penetrating radiation 4 such that the charged plate 1 can be in place just prior to X-rayexposures The plate 1 (or a charging grid 6) may be moved slightly in the direction of arrow 8 during charging to assure substantial uniform charging of the surface 2, the charging grid 6 also acting as a source of the electric field necessary to prevent ion discharge of the plate 1 during X-rayexposures After exposure plate 1 can be moved over a sensing head 9, such as an electrometer, or the sensing head could be moved adjacent to and under the plate 1. The above technique minimizes the time between charging and sensing thereby facilitating rapid readout. Further, the rapid cycling so provided would permit the use of higher dark decay photoconductors and would minimize, or even preclude, the amount of plate relaxation required.

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XEROX DISCLOSURE JOURNAL

X ERORADIOGRAPHIC ELECTROM ETER Proposed Classification SCAN EXPOSURE U.S~CL 250/315 R Ernest ft Lehmann Into CL B65d 51/16

3

a- 8

A xeroradiographic system for scanning the charged surface 2 of a xeroradiographic plate 1 after exposure of an object 3 to penetrating radiation 4~ The plate surface 2 is positioned away from the source 5 of penetrating radiation 4 such that the charged plate 1 can be in place just prior to X~rayexposures The plate 1 (or a charging grid 6) may be moved slightly in the direction of arrow 8 during charging to assure substantial uniform charging of the surface 2, the charging grid 6 also acting as a source of the electric field necessary to prevent ion discharge of the plate 1 during X~rayexposures After exposure plate 1 can be moved over a sensing head 9, such as an electrometer, or the sensing head could be moved adjacent to and under the plate 1. The above technique minimizes the time between charging and sensing thereby facilitating rapid readout. Further, the rapid cycling so provided would permit the use of higher dark decay photoconductors and would minimize, or even preclude, the amount of plate relaxation required.

Volume 4 Number 2 March/April 1979 193

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