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:
Feb. 19, 1980
Filed:
Aug. 17, 1978
Siegfried Barbieri, Brixen, IT;
Durst AG Fabrik Fototechnischer Apparate, Bozen, IT;
Abstract
An illuminating system is provided with a source of light for generating a beam of light having a ratio of energy distribution at three wave length ranges that differ from the spectral sensitivity of photographic copying material at those three wave length ranges. Color filters are inserted into the beam of light to a depth for compensating for the disparity between the energy distribution and spectral sensitivity. One of the filters is of a filter color that influences the wave length ranges having the highest energy levels in excess of a desired energy; a second filter of a second filter color influences only the wave length range with the largest energy excess over the desired energy level.