Sensor-illumination system for use in three-dimensional measurement of objects and assemblies of objects
US4645348A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 1, 1983 |
| Grant date | Feb 24, 1987 |
| Priority date | — |
| Expiry date | Sep 1, 2003 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01B11/2513
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A three-dimensional triangulation-type sensor-illumination system adapted for connection to a machine vision computer. The illumination source in the preferred system comprises a unique cross hair light pattern which provides sufficient image data to the computer to enable the computer to make three-dimensional measurements of a wide variety of features, including edges, corners, holes, studs, designated portions of a surface and intersections of surfaces. The illumination source and sensor are both mounted within a single housing in a specific position and orientation relative to one another, thereby permitting the system to be internally calibrated. In addition, the sensor-illuminator unit is preferably mounted in a test fixture so that the light source is substantially normal to the surface of the part to be examined and the sensor is thereby positioned at a perspective angle relative thereto.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.