Dynamic information storage or retrieval – Storage medium structure – Layered
Reexamination Certificate
2005-11-15
2005-11-15
Miller, Brian E. (Department: 2652)
Dynamic information storage or retrieval
Storage medium structure
Layered
Reexamination Certificate
active
06965556
ABSTRACT:
In an optical information medium having an information bearing surface having projections and depressions and/or capable of forming recorded marks, a functional layer is added. The information borne on the information bearing surface can be read by using reading light of a wavelength longer than 4NA·PLwherein PLis the minimum size of the projections and depressions or the recorded marks and NA is the numerical aperture of a reading optical system, setting the power of the reading light within such a range that the functional layer does not change its complex index of refraction, and irradiating the reading light to the information bearing surface constructed by the functional layer or to the information bearing surface through the functional layer or to the functional layer through the information bearing surface. The medium enables reading at a high resolution beyond the diffraction limit.
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Kato Tatsuya
Kikukawa Takashi
Shingai Hiroshi
Utsunomiya Hajime
Battaglia Michael V.
Miller Brian E.
Oblon & Spivak, McClelland, Maier & Neustadt P.C.
TDK Corporation
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