The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 17, 2003
Filed:
Sep. 24, 1999
Heidelberger Druckmaschinen Aktiengesellschaft, Heidelberg, DE;
Abstract
In a method and apparatus for point-by-point and line-by-line scanning of masters chucked on a scanner drum, for pixel-by-pixel illumination of the master, a light spot is generated with a light conductor, the light spot being imaged by a matching objective onto the master as an illumination spot. The scan light is focused with a scanner objective and is converted into an image signal in an opto-electronic scanner element. The illumination spot, scanner objective, and scanner element implement a feed motion in the direction of the rotational axis of the scanner drum for planar scanning of the master. Given employment of scanner drums having different diameters, the size of the illumination spot is corrected by a modification of the imaging scale of the light spot. The modification of the imaging scale occurs by displacing the light conductor with an actuating drive relative to the stationary matching objective. A corresponding focus correction occurs with a radial displacement of the scanner objective.