Rotary encoder with source-adjacent light sampling and control
US4712000A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 17, 1984 |
| Grant date | Dec 8, 1987 |
| Priority date | — |
| Expiry date | Oct 17, 2004 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03M1/308
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A rotary encoder comprises a light emitting device, a photosensor, sampling means arranged between the light emitting device and the photosensor for intercepting the light emitted by the light emitting device as the sampling means is rotated, monitoring means arranged on a side of the sampling means facing the light emitting device in adjacent to the light emitting device for sensing a portion of the light from the light emitting device and producing a signal representing a light intensity sensed, and control means for controlling the light intensity of the light emitting device in accordance with the output of the monitoring means.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.