Multiple beam optical pickup using a vertical cavity surface emi

Details Multiple beam optical pickup using a vertical cavity surface emi Multiple beam optical pickup using a vertical cavity surface emi

1997-10-29

2000-02-08

Neyzari, Ali

Dynamic information storage or retrieval

Specific detail of information handling portion of system

Radiation beam modification of or by storage medium

369 4423, 369 4437, 369 94, 369112, 369118, G11B 700

Patent

active

060234504

ABSTRACT:
An optical pickup capable of multiple track scanning, including a light source having at least two vertical cavity surface emitting lasers (VCSELs) to emit at least two or more light beams and a light controlling device for controlling the focal position of a light formed on one type of recording medium of two formats of different thicknesses, is provided. The light emitted from each VCSEL is focused on adjacent tracks of the recording medium via a polarization beam splitter, the light controlling device and an objective lens in sequence, and the light reflected from the recording medium is received by a photodetector via the objective lens, the light controlling device and the polarization beam splitter. The number of photodetectors correspond to the number of VCSELs to receive lights corresponding to each track.

REFERENCES:
patent: 4988153 (1991-01-01), Paek
patent: 5034344 (1991-07-01), Jewell et al.
patent: 5034958 (1991-07-01), Kwon et al.
patent: 5237581 (1993-08-01), Asada et al.
patent: 5349592 (1994-09-01), Ando
patent: 5351256 (1994-09-01), Schneider et al.
patent: 5483511 (1996-01-01), Jewell et al.
patent: 5638353 (1997-06-01), Takahashi
patent: 5734637 (1998-03-01), Ootaki et al.
patent: 5838715 (1998-11-01), Corzine et al.
patent: 5844879 (1998-12-01), Morita et al.
patent: 5926450 (1999-07-01), Braat
Patent Abstracts of Japan vol. 015, No. 511 (P-1292), Dec. 25, 1991 & JP 03 222130 A (Ricoh Co., Ltd.) Oct. 1, 1991 *Abstract.
Patent Abstracts of Japan vol. 095, No. 001, Feb. 28, 1995 & JP 06 295467 A (Nippon Columbia Co Ltd) Oct. 21, 1994 *Abstract.
Patent Abstracts of Japan vol. 018, No. 587 (P-1824), Nov. 10, 1994 & JP 06 215406 A (Matsushita Electric Ind Co Ltd) Aug. 5, 1994, *Abstract.

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