Abstract

A high performance magnetooptic head, which generates a bias magnetic field itself, has been developed. It has a moving magnet actuator to drive an objective lens. The moving magnets have two functions. One is to apply a constant magnetic field on the recording medium. The other is to comprise a magnetic circuit for focusing and tracking control. This magnetooptic head is suitable for use in the two-head erase and write method, in which it is not necessary to change the polarity of the bias magnetic field. Moreover, it enables designing a small-sized magnetooptic disk drive, because a bias magnetic field generator is built into the optical head.

© 1988 Optical Society of America

Magnetooptic erasable disk memory with two optical heads

Teruo Murakami, Kozo Taira, and Masafumi Mori
Appl. Opt. 25(22) 3986-3989 (1986)

Digital magnetooptic disk drive

T. Deguchi, H. Katayama, A. Takahashi, K. Ohta, S. Kobayashi, and T. Okamoto
Appl. Opt. 23(22) 3972-3978 (1984)

Compact magnetooptical disk for coded data storage

Masahiro Ojima, Atsushi Saito, Toshimitsu Kaku, Masaru Ito, Yoshito Tsunoda, Shinji Takayama, and Yutaka Sugita
Appl. Opt. 25(4) 483-489 (1986)

Magnetooptic recording readout performance improvement

Toshiaki Iwanaga, Satoshi Sugaya, Hiroshi Inada, and Tadashi Nomura
Appl. Opt. 27(4) 717-722 (1988)

Magneto-optical disk drive technology using multiple fiber-coupled flying optical heads. part I. System design and performance

Jeffrey P. Wilde, John F. Heanue, Alexander A. Tselikov, and Jerry E. Hurst
Appl. Opt. 40(5) 691-706 (2001)