Elliptical reflector illumination system for inspection of printed wiring boards
US4801810A · kind A · utility
19Cited by
3References
18Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jul 13, 1987 |
| Grant date | Jan 31, 1989 |
| Priority date | — |
| Expiry date | Jul 13, 2007 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N2201/0636
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An elliptical reflector illumination system for inspection of printed wiring boards including an elliptical reflector element for mounting above the board to be inspected with a region of the board generally at a first elliptical focus of the reflector element. There is a light source mounted generally at a second elliptical focus of the elliptical reflector element for illuminating substantially all facets of the region of the board at the first focus. One or more detectors are provided for sensing light reflected from the illuminated facets of at least a portion of the illuminated region of the board at the first focus.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.