Apparatus for determining the position of a point on an object or the shape of a portion thereof
US4498777A · kind A · utility
Inventor
Key dates
| Filing date | Feb 9, 1982 |
| Grant date | Feb 12, 1985 |
| Priority date | — |
| Expiry date | Feb 9, 2002 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01B11/005
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Apparatus for determining the position of a point on an object or the shape of a portion thereof comprising an object table; a measuring index; an optical viewing device; a part-reflecting mirror device arranged to enable an image of the measuring mark to be brought into coincidence with the said point or portion when the object is viewed through the optical viewing device; a movement effecting device for effecting relative movement of the object table and of the measuring index so as to bring the image of the measuring index into said coincidence; and, an indicator responsive to said movement effecting device for indicating the position of said point or the shape of said portion.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.