System and a method for optically detecting an edge of a tape
US5294803A · kind A · utility
35Cited by
15References
57Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Dec 31, 1991 |
| Grant date | Mar 15, 1994 |
| Priority date | — |
| Expiry date | Dec 31, 2011 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B27/36
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A method and apparatus performs the detection of an edge of a tape and further controls the read/write head to position itself relative to the detected edge. An array of photodetectors in an integrated circuit chip senses the intensity of light illuminating the chip with the tape running between the light source and the photodetectors. A light-to-dark transition is formed which is indicative of the edge of the tape.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.