Method and apparatus for forming magnetic images by piezoelectric coupling between an optical image and a magnetostrictive imaging component
US4106028A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 11, 1977 |
| Grant date | Aug 8, 1978 |
| Priority date | — |
| Expiry date | Oct 11, 1997 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G19/00
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
Method and apparatus are provided for forming a magnetic image on a recording element replicating incident image illumination. The recording element is a composite structure comprising a photoconductive, piezoelectric component and a magnetostrictive component. By rigidly associating these components, mechanical stress generated by the illumination of the photoconductive, piezoelectric component is transmitted to the magnetostrictive component, in which the mechanical stress is converted to imagewise coercivity variations. If the recording element is simultaneously subjected to a magnetic field, a remanent magnetic field that replicates the image is produced in the magnetostrictive component.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.