Optical encoder and method of operating the same
US11341342B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 14, 2018 |
| Grant date | May 24, 2022 |
| Priority date | — |
| Expiry date | Feb 14, 2038 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06K7/14
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
An encoder connected to an object is provided. The encoder includes a plate, a sensor, a memory and a processor. The plate has a pattern thereon. The sensor is configured to obtain an image of a portion of the pattern. The memory is configured to store a first set of reference images corresponding to a portion of the pattern and angle and/or position information corresponding to the first set of images. The processor is configured to shift the first set of reference images to obtain a second set of reference images and to compare the obtained image with the first set of reference images and/or the second set of reference images.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.