Zig-zag-patterned position sensor system
US6420692B1 · kind B1 · utility
3Cited by
1References
19Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 12, 1999 |
| Grant date | Jul 16, 2002 |
| Priority date | — |
| Expiry date | Nov 12, 2019 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH10F77/957
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An optical position detector which has adjacent detector cells connected to each other in a zig-zag pattern offers a wider dynamic range than a detector with a vertical separation line during transition between a read laser power and a write laser power. This allows use of a fast response bi-cell in place of a slower position sensing device (PSD). The optical position detector has detector cells coupled to each other in a zig-zag pattern. Each detector cell produces a signal when a light beam is focused onto the cell to indicate a location of the light beam relative to the cell.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.