Optical information recording apparatus for recording optical information in a phase change type optical recording medium and method therefor
US5272667A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 31, 1990 |
| Grant date | Dec 21, 1993 |
| Priority date | — |
| Expiry date | Dec 31, 2010 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B2007/24316
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
There is disclosed an optical information recording apparatus for recording optical information in a phase change type optical recording medium and a method therefor. The order of the atomic arrangement of the optical recording medium is capable of changing between a first state of order thereof and a second state of order thereof higher than the first state. A first light source generates a first light including the optical information and projecting the generated first light on the optical recording medium so as to change the order of the atomic arrangement of the optical recording medium from the first state to the second state and from the second state to the first state, mainly by heating the optical recording medium. A second light source generates a second light and projects the generated second light on the optical recording medium together with the first light so as to accelerate the change in the order of the atomic arrangement of the optical recording medium from the first state to the second state caused by the first light source by mainly exciting electrons in the optical recording medium, thereby recording the optical information in the optical recording medium.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.