Patent · US Expired

Optical single-bit recording and fluorescent readout utilizing aluminum oxide single crystals

US7072275B2 · kind B2 · utility

2Cited by
15References
75Claims
0Family size

Assignee

Inventors

Key dates

Filing dateApr 22, 2003
Grant dateJul 4, 2006
Priority date
Expiry dateSep 2, 2024

Classification

  • Technology area (CPC G)Physics
  • CPC primaryG11B2007/2432
  • WIPO fieldAudio-visual technology
  • WIPO sectorElectrical engineering

Abstract

The present invention provides methods and apparatuses for writing information to, reading information from, and erasing information on a luminescent data storage medium comprising Al2O3. The method includes writing and erasing of the information using photoionization via sequential two-photon absorption and non-destructive reading the information using fluorescent detection. The apparatuses for writing and reading the information incorporate confocal detection and spherical aberration correction for multilayer volumetric fluorescent data storage. The methods also allow multilevel recording and readout of information for increased storage capacity.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.