Rotary position encoder
US8637804B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Feb 15, 2010 |
| Grant date | Jan 28, 2014 |
| Priority date | — |
| Expiry date | May 4, 2031 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01D5/3473
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A rotary position encoder for determining a rotary position of a shaft includes a rigid substrate having a planar surface and mounted on the shaft to rotate with the shaft; an optical disk having at least a transparent polycarbonate layer and a reflective layer on the transparent polycarbonate layer, affixed to the planar surface of the substrate, the optical disk having a first circumferential track encoded therein having binary data; an optics assembly for interrogating the optical disk and providing an output signal indicative of data received from the interrogation of the optical disk; and a tracking motor for driving the optics assembly radially with respect to the optical disk.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.