Optical pickup apparatus for reproducing signals recorded on an

Details Optical pickup apparatus for reproducing signals recorded on an Optical pickup apparatus for reproducing signals recorded on an

1992-10-01

1994-10-11

Psitos, Aristotelis

Dynamic information storage or retrieval

Specific detail of information handling portion of system

Radiation beam modification of or by storage medium

369 47, 369112, 369 58, 369 4411, G11B 700

Patent

active

053553616

ABSTRACT:
An optical pickup apparatus reproduces signals recorded on an optical disk, which has a signal track in which a plurality of signal pit strings are arranged in a circumferential direction of the optical disk, each of the signal pit strings including a plurality of signal pits arranged in a line in a radial direction of the optical disk, the optical disk being rotated at a speed v relative to the optical pickup apparatus. The optical pickup apparatus is provided with: a device for projecting a light spot onto at least one signal pit string of the optical disk; a lens for converging a reflected light from the signal pit string and for forming a linear image of the signal pit string at a magnification m; and a one-dimensional scan type photodetector device having a plurality of photoelectric elements arranged in a line and located in an image forming position of the lens, for sequentially scanning, at a scanning speed s, the linear image by the photoelectric elements and for sequentially generating signals of the photoelectric elements. The photoelectric elements are arranged at an angle .theta. with respect to the direction of the linear image, the angle .theta. being prescribed as follows:

REFERENCES:
patent: 4353077 (1982-10-01), Gokey et al.
patent: 5081617 (1992-01-01), Gelbart
patent: 5084858 (1992-01-01), Maeda
patent: 5146445 (1992-09-01), Nakamura et al.
patent: 5224082 (1993-06-01), Kurokawa et al.

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