Method and device for determining the absolute coordinates of an object
US6876458B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Mar 19, 2003 |
| Grant date | Apr 5, 2005 |
| Priority date | — |
| Expiry date | Mar 19, 2023 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01B11/2513
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
In a method for determining the absolute coordinates of an object (1), the object (1) is exposed to light (3) through a projection grid (2). The light (4) reflected by the object 1 is registered by a sensor (5). The image picked up by the sensor is evaluated. In order to improve such a method, the projection grid (2) comprises a first grid with a first grid vector (G1), and a second grid with a second grid vector (G2) which differs from said first grid vector. The sensor (5) is arranged at a distance (b) from the projection grid (2) such that the projections (bx, by), of the base vector (b) leading from the first and from the second grids to the sensor (5), onto the associated grid vectors (G1, G2) differ in size.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.