Three-dimensional measuring system and method of measuring the shape of an object
US6151118A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 18, 1997 |
| Grant date | Nov 21, 2000 |
| Priority date | — |
| Expiry date | Nov 18, 2017 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01B11/2518
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A three-dimensional measuring system comprises an optical system for emitting a light and optically scanning an object, a measuring sensor having an image pickup surface consisting of a plurality of picture elements and adapted to receive the light reflected on the surface of the object, a galvanometer mirror for changing a direction in which the light irradiates the object, a system controller for driving the measuring sensor so as to allow the same to output information on the quantity of light incident on each of the picture elements, and a barycentric calculation circuit for finding an instant when the light traverses each of the picture elements. This instant is found by implementing a barycentric calculation on the basis of outputs of the measuring sensor taken for a prescribed period of time and an instant at which each of the outputs is taken. The measuring system further comprises a host computer for finding a position on the surface of the object corresponding to each of the picture elements. This position is found on the basis of a relationship between a direction in which the light irradiates the object at an instant when the light traverses each of the picture elements…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.