Optical inspection apparatus for moving articles
US4581632A · kind A · utility
36Cited by
7References
22Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 8, 1985 |
| Grant date | Apr 8, 1986 |
| Priority date | — |
| Expiry date | Feb 8, 2005 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N21/88
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An optical inspection system for articles moved by a conveyor, in which photo-electric transducers of one or more cameras are directed onto a transverse viewing area to detect light variations in individual articles. A threshold system permits correction for light signals in relation to the angular distance between the article being observed and the camera optical axis. A two-step inspection involves first detecting anomalous light levels, and subsequently detecting the size of each defect.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.