Apparatus and method for reducing shade effects during print quality control
US5790186A · kind A · utility
5Cited by
6References
22Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 27, 1995 |
| Grant date | Aug 4, 1998 |
| Priority date | — |
| Expiry date | Dec 27, 2015 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB41F33/02
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
An apparatus and method for reducing shade effects associated with print quality control, typically generated while viewing or imaging a partly transparent/partly opaque printed material against a light diffusing surface. The reduction in shade effects is by illuminating the printed material from above and viewing or imaging the printed material against a multiple volume light scatterer, thereby redistributing at least part of the light, such that at least part of the scattered light illuminates shaded regions in the image or view obtained.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.