Apparatus for determining the three-dimensional shape of an object optically without contact
US5262844A · kind A · utility
4Cited by
6References
7Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 2, 1992 |
| Grant date | Nov 16, 1993 |
| Priority date | — |
| Expiry date | Mar 2, 2012 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01B11/2527
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Apparatus for determining the three-dimensional shape of an object by projecting patterns onto the surface of the object, the patterns having fringes with a light intensity that varies sinusoidally in space, said apparatus comprising means (30, 34, 36) for changing the pattern centered on the projection optical axis (28), and cam means (54) for displacing the patterns (12a, 12b) transversely through distances equivalent to phase shifts of 2.pi./n.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.