Methods of separating selected items from a mixture including raisins and the selected items
US5464981A · kind A · utility
38Cited by
7References
27Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 10, 1995 |
| Grant date | Nov 7, 1995 |
| Priority date | — |
| Expiry date | Feb 10, 2015 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S250/91
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Methods of operating an automated optical inspection system to separate selected items, e.g., grape stems (124, 126, 128), grape leaves (122), or rocks from a mixture (16) of those items and raisins (120) include illuminating the mixture with illumination (37', 37") characterized by a spectral power distribution (86, 98) in the near infrared (88, 90, 100, 102), detecting reflections of wavelengths of the illumination in the near infrared, identifying the selected items based on the detected reflections, and sorting the selected items from the mixture.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.