Exposure system for copying machines

US4173411A · kind A · utility

Assignee

• AGFA-Gervaert AG · DE

Inventors

• Hans A. Massengeil
• Otto Stemme · Munich, DE
• Rudolf Eppe
• Josef Pfeifer · Therwil, CH
• Georg Konigl · Munich, DE
• Anton Schatz · Munich, DE

Key dates

• Filing date: Nov 25, 1977
• Grant date: Nov 6, 1979
• Expiry date: Nov 25, 1997

Classification

• Technology area (CPC G): Physics
• CPC primary: G02B13/24
• WIPO field: Optics
• WIPO sector: Instruments

Abstract

Relative movement is effected between the original and the projection system of the copying machine, and the latter projects images of successive transverse strip-shaped sections of the original onto the recording medium. The projection system comprises a plurality of lens-row systems. Each lens-row system includes a first lens row which receives light from a strip-shaped section of the original and projects into an intermediate image plane, and a second lens row which receives light from the intermediate image plane and projects that light onto the recording medium. The lens-row systems are spaced apart in a direction transverse to the direction of elongation of the individual lens rows. The light passing through each lens-row system includes a plurality of central rays, each passing through the optical center of one lens element of the first lens row and through the optical center of the corresponding lens element of the second lens row. Optical deflecting structure is utilized to cause the central rays of the plural lens-row systems to converge both in the vicinity of the original and in the vicinity of the recording medium. Thus, when the plural lens-row systems image onto the …