Optical rotary encoder
US4727356A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 29, 1986 |
| Grant date | Feb 23, 1988 |
| Priority date | — |
| Expiry date | Jul 29, 2006 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03M1/301
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
An optical rotary encoder is formed by a control pulse generator portion and a selector switch portion which are of the unitary construction. The control pulse generator portion is formed by a code plate having a plurality of alternately formed reflecting and non-reflecting areas, a plurality of light emitting and receiving elements facing the code plate and an inner shaft for rotating the code plate. The selector switch portion is formed by a second code plate having a plurality of light transmitting apertures, a plurality of light emitting elements facing the second code plate, a plurality of light receiving elements provided on the opposite side of the second code plate from those light emitting elements and an outer shaft for rotating the second code plate. The inner and outer shafts are connected to each other and have a common axis of rotation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.