Optical head for optical disk drive

Details Optical head for optical disk drive Optical head for optical disk drive

1996-10-01

1998-01-13

Nelms, David C.

Dynamic information storage or retrieval

Specific detail of information handling portion of system

Radiation beam modification of or by storage medium

369 13, 369 4412, 369 4414, 369 4423, 369103, 369110, 369122, G11B 700

Patent

active

057086443

ABSTRACT:
An optical head for a magneto-optical disk drive, including a laser diode mounted on a stem, a magneto-optical signal detector unit, and an error signal detector unit for detecting a focusing error and a tracking error. A cap is mounted on the stem so as to surround the laser diode and these detector units, and a beam splitter unit including a polarization beam splitter and a polarizing prism is mounted on the cap. A hologram for diffracting an error signal beam toward the error signal detector unit is formed on a lower surface of the beam splitter unit.

REFERENCES:
patent: 5579291 (1996-11-01), Matsumoto
patent: 5583843 (1996-12-01), Horinouchi
patent: 5608233 (1997-03-01), Sahara et al.
patent: 5621714 (1997-04-01), Kobayashi et al.

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