Contactless position and displacement measuring device
US6034765A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Apr 9, 1998 |
| Grant date | Mar 7, 2000 |
| Priority date | — |
| Expiry date | Apr 9, 2018 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH10F77/957
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A contactless position and displacement measuring device includes at least one light source and at least one photosensor adapted to move relative to each other. When illuminated by a light beam emitted by the light source the photosensor generates at least one electrical signal representative of the position of the light source relative to the photosensor. The sensor includes a plurality of layers deposited onto a support, namely at least one resistive first layer to form a potentiometer track, at least one photosensitive second layer to deliver electrical charges when it is illuminated by the light beam emitted by the source and at least one metallic third layer to collect the electrical charges generated by the photosensitive second layer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.