Method of producing an X-ray exposure by means of a photoconductor and arrangement for carrying out the method

US4975935A · kind A · utility

Assignee

• U.S. Philips Corporation · US

Inventors

• Walter Hillen · Besigheim, DE
• Stephan Rupp · Forchheim, DE
• Ulrich Schiebel · Aachen, DE
• Ingo Schafer · Kiel, DE

Key dates

• Filing date: Dec 13, 1989
• Grant date: Dec 4, 1990
• Expiry date: Dec 13, 2009

Classification

• Technology area (CPC G): Physics
• CPC primary: G03G15/054
• WIPO field: Environmental technology
• WIPO sector: Chemistry

Abstract

The invention relates to a method of producing an X-ray exposure is provided by a photoconductor, which converts X-radiation into a charge pattern, is evenly charged locally before the X-ray exposure, is discharged by the exposure as a function of the intensity of the X-radiation and the surface of which is scanned after the exposure for detecting the charge density, an image value being formed for each image point, corresponding to the discharge at the image point. The measured image values may be falsified by the self-discharge of the photoconductor induced by X-radiation. Since the self-discharge always proceeds in accordance with the same time laws, the self-discharge effects are corrected utilizing the time of the scanning instants, i.e., position in time with respect to the X-ray exposure and the end of the charging of the photoconductor in conjunction with a characteristic discharge function of the photoconductor and a correction factor.