Patent Number: 6,298,026

Title: Magneto-optical head apparatus using evanescent light

Abstract: A magneto-optical head includes an optical member, objective lens, SIL and coil. The magneto-optical head converts a laser beam to an evanescent light and directs it to a magneto-optical recording medium. Further, the magneto-optical head applies a magnetic field to the magneto-optical recording medium. When tilt is caused, it decreases the tilt angle. The optical member refracts the laser beam to a prescribed direction to be directed to the objective lens when the laser beam is displaced from a designed optical axis. The objective lens allows the laser beam to be focused onto a point on an end face of the SIL. Further, the SIL emits the evanescent light. The optical member is arranged in contact with the optical member. As a result, a signal can accurately be recorded or reproduced even when tilt is caused to an optical disk while alleviating the problem associated with the tilt.

Inventors: Suzuki; Yoshihisa (Bisai, JP), Tanaka; Sayoko (Gifu, JP), Mitani; Kenichiro (Gifu, JP)

Assignee: Sanyo Electric Co., Ltd.

International Classification: G11B 11/00 (20060101); G11B 11/105 (20060101); G11B 7/135 (20060101); G11B 7/095 (20060101); G11B 7/125 (20060101); G11B 007/00 (); G01D 015/12 ()

Expiration Date: 10/02/2018