Dense multi-axis array for motion sensing
US7405389B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 15, 2005 |
| Grant date | Jul 29, 2008 |
| Priority date | — |
| Expiry date | Aug 8, 2026 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F3/0317
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
The present disclosure describes an optical displacement sensor having a dense multi-axis array of photosensitive elements. Generally, the sensor includes a two dimensional array of multiple photosensitive elements. In one embodiment, the array includes multiple linear arrays of photosensitive elements arranged along three or more axes in a space-filling, close-packed multi-axis array. The photosensitive elements are connected to each other in such a way that motion is determinable along each of the axes by measuring differential photocurrents between photosensitive elements along each of the axes. The inventive architecture advantageously increases signal redundancy, and reduces signal drop-out or low signals due to random fluctuations in the incident or absorbed light or in the signals from the photosensitive elements.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.