Programmable illuminator for vision system
US6633338B1 · kind B1 · utility
16Cited by
17References
18Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 27, 1999 |
| Grant date | Oct 14, 2003 |
| Priority date | — |
| Expiry date | Apr 27, 2019 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N21/8806
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
The field portion (40) of a workpiece (14) that an electro-optical system (28) can image is deflected by a field-of-view deflector (38) and an array of light sources (42, 44) illuminates the workpiece. As the field of view (40) moves about the workpiece surface, individual sources (42, 44) in the light-source array are so turned on and off that all sources that could be imaged into the field of view by specular reflection are turned off. In this way, proper dark-field illumination is maintained.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.