Light transmitting member driving device for a contour measuring apparatus
US6480678B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Aug 30, 2001 |
| Grant date | Nov 12, 2002 |
| Priority date | — |
| Expiry date | Aug 30, 2021 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01B11/2536
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A three-dimensional measuring apparatus or similar contour measuring apparatus of the present invention includes a projector for emitting light, a lattice film or similar light transmitting member, and a camera. Light issuing from the projector is transmitted through the lattice film to illuminate an object to be measured. The lattice film is movable to a plurality of projecting positions in a preselected direction. The camera shoots the object being illuminated by the light. A driving device for driving the lattice film includes a cam follower associated with the lattice film, and a cam for guiding the cam follower. The cam has a cam surface including a plurality of contiguous, insensitive portions each for causing the lattice film to remain in a halt at a particular position when the cam follower contacts the insensitive portion.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.