Incremental optical encoder having partially opaqued quadrature detectors
US5763874A · kind A · utility
29Cited by
7References
5Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 29, 1996 |
| Grant date | Jun 9, 1998 |
| Priority date | — |
| Expiry date | Feb 29, 2016 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01D5/36
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An optical encoder having a detector device including four light detectors, each formed of an elongated light sensitive surface. Free zones of this surface alternate with zones covered by an opaque layer arranged so that the cooperation of the light detectors with an encoder disc which leads to the delivery of output signals in phase quadrature, each light detector generating an output signal of a single phase.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.