The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 21, 2002
Filed:
Jan. 28, 2000
Walter Kraft, Zürich, CH;
Max Nussbaumer, Bellikon, CH;
Gretag Imaging Trading AG, , CH;
Abstract
The present invention relates to a system for the optimization of a copying light profile during copying of photographic originals in a photographic copier. The photographic copier comprises a light source for producing copying light, a number of light conducting means for guiding the copying light along a light path, and a local transmission modulator. An element with a known transmission profile is provided in the light path for being shone through, whereby no photographic original to be copied and of unknown transmission profile is found in the light path, and furthermore a transmission profile specific for the local transmission modulator is provided. The resulting copying light is measured broken down by area, and the profile of the copying light is measured and compared with a desired copying light profile. Based on this comparison, the transmission profile preselected for the copying process is optimized.