Optical pick-up device for processing central and peripheral opt

Details Optical pick-up device for processing central and peripheral opt Optical pick-up device for processing central and peripheral opt

1996-01-30

2000-09-19

Young, W. R.

Dynamic information storage or retrieval

Specific detail of information handling portion of system

Radiation beam modification of or by storage medium

369 4423, 369120, G11B 708

Patent

active

061222410

ABSTRACT:
An optical pick-up device for at least one of recording, reproducing and deleting data on a recording medium includes a light source emitting a light, an objective lens focusing the light from the light source at a predetermined position of a data track of the recording medium and a light receiving element detecting a reflected light from the recording medium. A light receiving means divides the reflected light from the recording medium in a data track direction and detects a part of the reflected light. The reflected light is divided onto the light receiving element into a central component and peripheral components and an original signal is reproduced from at least one of a difference between the peripheral components and the difference between the peripheral components and a central component.

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Yamanaka et al., Temperature Distribution Analysis on Optical Disk by Superresolution Spot, Optics, vol. 21, No. 5, 1992/5, pp. 342-345.
Applied Physics, vol. 61, No. 3, 1992, pp. 250-253.

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