Hologram integrated with a beam splitter to separate a plurality

Details Hologram integrated with a beam splitter to separate a plurality Hologram integrated with a beam splitter to separate a plurality

1995-10-25

1997-07-15

Epps, Georgia Y.

Dynamic information storage or retrieval

Specific detail of information handling portion of system

Radiation beam modification of or by storage medium

369109, 369103, 369112, 369 4423, 369 4437, G11B 7135, G11B 1110

Patent

active

056489501

ABSTRACT:
In an optical pickup system, the light emitted from a source to illuminate an optical recording medium is reflected and directed via a beam splitter to a photodetector so as to read information signals, and a hologram device for splitting the emerging light from the source into a plurality of beams is provided as an integral part of the entrance surface of the beam splitter.

REFERENCES:
patent: 5136424 (1992-08-01), Cox et al.
patent: 5455712 (1995-10-01), Yamamoto et al.
patent: 5490133 (1996-02-01), Nakamura et al.
patent: 5515354 (1996-05-01), Miyake et al.
patent: 5532999 (1996-07-01), Aikoh et al.
patent: 5535055 (1996-07-01), Ono et al.
patent: 5544143 (1996-08-01), Kay et al.

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