Non-contact type measuring device for measuring three-dimensional shape using optical probe
US5410410A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 29, 1992 |
| Grant date | Apr 25, 1995 |
| Priority date | — |
| Expiry date | Dec 29, 2012 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01B11/26
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A sensor unit of an optical probe includes an illuminating device having an illuminating point arranged on the central portion of a detective surface facing a to-be-measured object, and eight light receiving devices arranged on the x and y axes in the detective surface, for receiving a reflected light from the object, four light receiving points among those of the eight light receiving devices being symmetrically arranged on the x axis with respect to the illuminating point and the remaining four light receiving points thereof being symmetrically arranged on the y axis with respect to the illuminating point. The rotation angle .theta. of the unit normal vector around the x axis and the rotation angle .phi. thereof around the y axis in the detective surface are calculated by processing the amounts of light received by the eight light receiving devices of the sensor unit.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.