Apparatus for laser marking indicia on a photosensitive web
US6236426A · kind A · utility
1Cited by
3References
6Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 25, 2000 |
| Grant date | May 22, 2001 |
| Priority date | — |
| Expiry date | Jan 25, 2020 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G15/04018
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An apparatus for laser marking indicia on a moving photosensitive web substantially reduces fog spots on the web caused by impinging laser energy. A laser beam attenuating member arranged in the laser beam tube enables control of peak laser beam power thereby significantly reducing the incident of fog spots on the film surface.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.