Encoder with a light emitting editing wheel
US5384460A · kind A · utility
Assignees
Inventor
Key dates
| Filing date | Nov 3, 1993 |
| Grant date | Jan 24, 1995 |
| Priority date | — |
| Expiry date | Nov 3, 2013 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01D5/34715
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An encoder with a light emitted editing wheel comprises an editing wheel defines a wheel body and a hole in its middle portion. The editing wheel is made from transparent material, such glass, acrylic etc. The editing wheel is mounted on a shaft member and can be actuated to rotate thereon via suitable actuating means. A plurality of light focusing means being disposed along the circumference of the editing wheel. A light receiving means is provided radially on the wheel body. The light focusing means is interconnected with the light receiving means and capable of focusing a light source transmitted from the light receiving means into a plurality of light point. A light source is disposed at a perpendicular position above the editing wheel. The light source is capable of sending a light to the light receiving means of the editing wheel. And a sensor means is disposed adjacent to the light focusing means. A pair of light detecting means are provided at the sensor means thereon. The light detecting means is capable of sending an active signal as a light point is received thereon.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.