Method of producing an X-ray exposure by means of a photoconduct

Details Method of producing an X-ray exposure by means of a photoconduct Method of producing an X-ray exposure by means of a photoconduct

1989-12-13

1990-12-04

Howell, Janice A.

X-ray or gamma ray systems or devices

Specific application

Xeroradiography

378 32, 355208, 355214, 25037009, B41M 500, G01T 124

Patent

active

049759353

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.

REFERENCES:
patent: 4300062 (1981-11-01), Marshall, Jr.
patent: 4377742 (1983-03-01), Kawabata et al.
patent: 4554453 (1985-11-01), Feigt et al.
patent: 4752944 (1988-06-01), Conrads et al.

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