Imaging device for printing form

US6937262B2 · kind B2 · utility

Assignee

• Heidelberger Druckmaschinen AG · DE

Inventors

• Uwe Ernst · Mannheim, DE
• Bernd Vosseler · Heidelberg, DE

Key dates

• Filing date: Jun 18, 2003
• Grant date: Aug 30, 2005
• Expiry date: Jun 18, 2023

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B41J2/451
• WIPO field: Textile and paper machines
• WIPO sector: Mechanical engineering

Abstract

A device for recording images on a printing form (46), having at least one laser diode bar (10), which includes a number of laser diodes (12) whose image spots (56) lie disjunctly in an image field (36), and having an array (16) of microlenses (20) positioned in the emission region (14) of the light radiated by the laser diode bar, one microlens (20) being assigned to each optical path (18) of a laser diode (12). The device is distinguished in that at least one first laser diode (22) and one second laser diode (24) are densely positioned on the laser diode bar (10) in such a way that the first optical path (26) of the first laser diode (22) and the second optical path (28) of the second laser diode (24) run through a first microlens (30) of the array. The device can be used, in particular, in a print unit or a printing press and, at a given width of the laser diode bar, makes it possible to provide a greatest possible number of imaging channels (40).