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Arrangement for capturing image of printing substrate web

A technology for printing materials and formats, applied in the field of image devices, can solve problems such as the inability to achieve uniform illumination in the image area.

Active Publication Date: 2016-03-02
BST ELTROMAT INT GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Homogeneous illumination of the image field cannot be achieved in this case

Method used

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  • Arrangement for capturing image of printing substrate web
  • Arrangement for capturing image of printing substrate web

Examples

Experimental program
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Embodiment Construction

[0013] exist figure 1 The image recording device shown in FIG. 2 includes a camera 10 and a light source 12 , which are arranged in the printing press in such a way that images printed on a printing material web 14 can be recorded and electronically processed. In this respect, only the printing cylinder 16 , the pressure cylinder 18 and the guide cylinder 20 , through which the printing material web 14 is drawn off from the pressure cylinder, are shown in the printing press. The registration control device 22 processes the image captured by the camera 10 and controls the drive and lateral position of the printing cylinder 16 in such a way that the color component images printed by the printing cylinder 16 are compared with other, not shown, images. The other color component images printed by the printing equipment on the printing material web are accurately overlapped.

[0014] The light source 12 comprises a circuit board 24 equipped with light-emitting diodes, in front of w...

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Abstract

The invention relates to an arrangement for capturing an image of a printing substrate web (14) in a printing machine, comprising a camera (10) that has a sensor field (32) extending parallel to the printing substrate web, and an objective lens (30) whose optical axis (A) runs at right angles to said sensor field (32), and comprising a light source (12) that is arranged relative to the printing substrate web (14) such that the light emitted therefrom is reflected by reflective surface portions of the printing substrate web, mainly into the camera (12). The invention is characterised in that the objective lens (30) is arranged to be offset to the sensor field (32) such that a straight line (B) extending through the centre of the sensor field (32) and the centre of the objective lens (30) and a straight line (C) extending from the centre of the light source (12) to the centre of the light incident on the image field (28) on the printing substrate web (14) each form an angle ([beta], [gamma]) to the axis of incidence (l), these angles being equal.

Description

technical field [0001] The invention relates to a device for capturing images on a printing material web in a printing press, the device comprising a camera having a sensing area extending parallel to the printing material web and a lens, the optical axis of the lens being aligned with the sensing area Extending at right angles, the device also includes a light source which is arranged relative to the printing material web in such a way that the light emitted by the light source is mainly reflected into the camera by the reflective surface of the printing material web. Background technique [0002] Such a camera is used, for example, to generate a feedback signal to a register regulator in a printing press. The light source should be arranged in such a way that, in particular when the printing material web is a reflective surface or at least has a reflective partial surface, for example when the printing material web is a reflective metal foil or is metallized or printed wit...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B41F33/00G01N21/89G06K9/20G06T7/00H04N1/028H04N1/195
CPCB41F33/0081G01N21/8901H04N1/19594B41P2233/13G01N21/8983H04N1/0284H04N2201/0081B41J13/0009
Inventor 克劳斯·雷克富斯弗兰克·伯切尔
Owner BST ELTROMAT INT GMBH
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