Detector array for optical encoders
US7199354B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Aug 26, 2004 |
| Grant date | Apr 3, 2007 |
| Priority date | — |
| Expiry date | Feb 22, 2025 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01D5/36
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A photodiode detector array for optical encoders includes a plurality of photodiodes, each of the photodiodes providing a scanning signal with a defined phase relationship to a scale when the detector array moves relative to the scale. A plurality of switching elements is provided for selectively combining each of the photodiodes with other photo diodes in a defined manner. The switching elements allow the photodiodes to be unambiguously combined for at least two different scale radii so that a defined number of phase shifted scanning signals is generated in each case. The combination of the photodiodes differs between the at least two different scale radii.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.