Computer controlled, multiple angle illumination system
US5185638A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 26, 1991 |
| Grant date | Feb 9, 1993 |
| Priority date | — |
| Expiry date | Apr 26, 2011 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N2201/069
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
The illumination system as a part of an optical inspection system, the total inspection system itself, and the method of illuminating and inspecting a workpiece. The illumination system is computer controlled as to a level of intensity and adjustable as to angle of incidence. The illumination system includes illumination control electronics, a quad quartz halogen lamp array light source, a fiber optic line converter and an illumination collection system, having a collimator lens array and a focusing/field coverage lens. As a result of the present invention, determinations of false defects on the PCB are minimized. Human contact with the PCB is also minimized and the rate of inspections performable is increased.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.