Method for optimizing a copying light profile
US6392739B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 28, 2000 |
| Grant date | May 21, 2002 |
| Priority date | — |
| Expiry date | Jan 28, 2020 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03B27/80
- WIPO fieldOptics
- WIPO sectorInstruments
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.