Dynamic information storage or retrieval – Condition indicating – monitoring – or testing
Reexamination Certificate
2007-03-13
2007-03-13
Edun, Muhammad (Department: 2627)
Dynamic information storage or retrieval
Condition indicating, monitoring, or testing
C369S275100, C369S047100, C369S100000
Reexamination Certificate
active
10633654
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 one-photon absorption and confocal 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.
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International Search Report, International Application No.: PCT/US2003/31730, dated May 4, 2006.
Akselrod Anna E.
Akselrod Mark S.
Orlov Sergei S.
Edun Muhammad
Jagtiani & Guttag
Landauer, Inc.
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