Reference position detecting device utilizing a plurality of photo-detectors and an encoder using the device
US5059791A · kind A · utility
14Cited by
13References
48Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 3, 1990 |
| Grant date | Oct 22, 1991 |
| Priority date | — |
| Expiry date | Oct 3, 2010 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01D5/38
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A reference position detecting device comprises an optical device for directing a light beam to a pattern indicating the reference position and plural photoreceptor elements for receiving the light beam obtained through the pattern. A reference position signal is obtained from signals from the photoreceptor elements.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.