Method of and apparatus for ascertaining the characteristics of shorter and longer sections of photographic material

US5303000A · kind A · utility

Assignee

• Agfa-Gevaert NV · BE

Inventors

• Gerhard Benker · Pullach, DE
• Ulrich Klueter · Munich, DE
• Reimund Muench · Munich, DE
• Erich Nagel · Anzing, DE
• Wilhelm Nitsch · Munich, DE
• Volker Weinert
• Hans-Joachim Vedder · Puchheim, DE

Key dates

• Filing date: May 5, 1992
• Grant date: Apr 12, 1994
• Expiry date: May 5, 2012

Classification

• Technology area (CPC G): Physics
• CPC primary: G03B27/735
• WIPO field: Optics
• WIPO sector: Instruments

Abstract

Strips of coherent, exposed and developed film frames are advanced past, and discrete frames are placed onto, a window at a monitoring station where successive increments of the film frames are monitored by a device having photocells forming at least one row which extends transversely of the path of advancement of strips. The monitoring device is at a standstill during advancement of strips but is transported past a discrete frame at the monitoring station. Such monitoring device can ascertain the density of film frames, and its photocells generate signals which are used to image the frames onto photographic paper.