Holographic optical element for optical disk pickup head

Details Holographic optical element for optical disk pickup head Holographic optical element for optical disk pickup head

1995-05-17

1996-06-04

Ben, Loha

Dynamic information storage or retrieval

Specific detail of information handling portion of system

Radiation beam modification of or by storage medium

369103, 369105, 369116, 369 4425, 2502015, G11B 700

Patent

active

055239935

ABSTRACT:
A pickup head for use in optical disk systems such as compact disk players or CD-ROM computer memory includes a holographic optical element that has two decision regions that greatly simplify the design of the pickup head. The two decision regions diffract light that encounters the holographic optical element in two different directions, respectively. The amount of light power incident upon each decision region is utilized to determine a focus error signal and to interpret information stored on the compact or optical disk.

REFERENCES:
patent: 4686663 (1987-08-01), Kuhn
patent: 4945529 (1990-07-01), Ono et al.
patent: 4983017 (1991-01-01), Tsuji et al.
patent: 5157249 (1992-10-01), Hashimoto et al.
patent: 5361246 (1994-11-01), Tominaga
patent: 5410529 (1995-04-01), Kurata et al.
patent: 5412631 (1995-05-01), Komma et al.

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