Dynamic information storage or retrieval – Specific detail of information handling portion of system – Radiation beam modification of or by storage medium
Patent
1996-01-30
1998-07-07
Ben, Loha
Dynamic information storage or retrieval
Specific detail of information handling portion of system
Radiation beam modification of or by storage medium
369100, 369110, 369 4432, G11B 700
Patent
active
057779740
ABSTRACT:
In an optical head for radiating a light spot on a magneto-optical recording medium and detecting light received via the medium, there are provided a light source, a condenser lens for condensing light from the light source, a photodetector, and a deflecting device. The photodetector detects interference light between light generated by a magneto-optical effect of the medium and light generated by diffraction on a curved surface of the condenser lens. The deflecting device is arranged between the light source and the recording medium. The deflecting device includes a beam splitter with polarized light splitting characteristics and functions to deflect the light from the light source toward the recording medium.
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Ben Loha
Canon Kabushiki Kaisha
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