Projection system for copying machines

US4215933A · kind A · utility

Assignee

• AGFA-Gervaert AG · DE

Inventors

• Paul Feneberg
• Georg Konigl · Munich, DE
• Gunther Kirchhof · Taufkirchen, DE
• Anton Schatz · Munich, DE

Key dates

• Filing date: Dec 19, 1978
• Grant date: Aug 5, 1980
• Expiry date: Dec 19, 1998

Classification

• Technology area (CPC G): Physics
• CPC primary: G03B27/528
• WIPO field: Optics
• WIPO sector: Instruments

Abstract

A copying-machine projection system successively projects successive strip-shaped zones of an original onto successive strip-shaped zones of a photosensitive surface. The projection system is of the type comprising at least one row of component projection objectives extending transverse to the direction of relative movement as between projection system and photosensitive surface. The individual component projection objectives are constituted by corresponding lenticular elements of plural lens bars, the lens bars extending transverse to the relative-movement direction and being provided with respective rows of lenticular elements. The projection system projects a strip-shaped image onto the photosensitive surface but also forms an intermediate image plane. Located at the latter is a lens-aperture plate, the lens apertures of which are so shaped that the adjoining boundaries of adjoining lens apertures extend at an angle relative to the direction perpendicular to the relative-movement direction, this angle being at most equal to 80.degree.. As a result of this inclination, if the individual light fields projected improperly overlap, improperly overlap more or less than they nominally…