System and a method for controlling position of a magnetic head relative to a servo track of a tape by optical detection of an edge of the tape
US5294791A · kind A · utility
29Cited by
16References
19Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Feb 13, 1992 |
| Grant date | Mar 15, 1994 |
| Priority date | — |
| Expiry date | Feb 13, 2012 |
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.