Dynamic information storage or retrieval – Specific detail of information handling portion of system – Radiation beam modification of or by storage medium
Patent
1999-11-12
2000-10-10
Edun, Muhammad
Dynamic information storage or retrieval
Specific detail of information handling portion of system
Radiation beam modification of or by storage medium
369 54, 369121, 369 4437, G11B 700
Patent
active
061308730
ABSTRACT:
Methods and apparatus are provided for retrieving encoded information from data tracks on an optical disk using an array of microlasers as the illumination sources, an array of micro-scale photo detectors as the detection elements, and a bilens (BL) or a holographic optical element (HOE) as the main optical component. Multiple configurations are provided to position microlasers and photo detectors together on a mobile laser/detector block (LDB). The microlasers and detectors may be arranged in a hexagonal lattice relationship for an optimally compact arrangement. Laser beams generated by the surface-emitting microlasers are guided by the BL onto the optical disk (OD) surface. The reflected light is collected by the same BL or HOE, shifted, and then directed back onto the respective photo detectors on the LDB. Illumination, detection and alignment methods and apparatus for tracking, focusing, and magnification servo controls are also incorporated on the LDB.
REFERENCES:
patent: 5757741 (1998-05-01), Jiang et al.
patent: 5894467 (1999-04-01), Wang
patent: 6023450 (2000-02-01), Park et al.
Samsung Electronics, "Hologram Optical Module using VCSEL," Samsung Electronics Product Information, Samsung Electronics (Place and Date of Publication Not Known).
Hang Zhijiang
Lazarev Victor
Miyazawa Hiroshi
Edun Muhammad
Kenwood Corporation
New Dimension Research & Instrument, Inc.
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