Detection of three-dimensional information with a projected plane of light
US4594001A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 6, 1983 |
| Grant date | Jun 10, 1986 |
| Priority date | — |
| Expiry date | Oct 6, 2003 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01B11/24
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An object is scanned first with a light plane from a variable-intensity light-plane projector, and the reflected light is used as signals to modify point by point the output of the projector in accordance with the intensity of the respective reflective-light signal. Thereupon the object is scanned a second time and the projector is instructed to apply less light than before to those points of the object from which a strong reflected-light signal was received during the first scan, and/or to apply more light to points from which a weak reflected-light signal was received during the first scan. In similar manner, a projected intensity encoded light volume is projected on an object and the reflected light is used as signals to point-by-point modify the output of the projector for subsequent projections.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.