Detection of three-dimensional information using a projected point or line of light
US4494874A · kind A · utility
37Cited by
4References
6Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 7, 1981 |
| Grant date | Jan 22, 1985 |
| Priority date | — |
| Expiry date | Jul 7, 2001 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01B11/24
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An object is scanned first with a flying light spot from a variable-intensity light-spot projector, and the reflected light is used as signals to point by point modify 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 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 to apply more light to points from which a weak reflected-light signal was received during the first scan.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.