Sharp Kabushiki Kaisha Corporation

Akihito Yoshimoto

Tohru Okuda

Tatsushi Yamamoto

Hideo Okada

Takamitsu Tadera

Masaji Tsuji

Yoshio Yoshida

Shigeaki Kakiwaki

Sigeaki Kakiwaki

In manufacturing an optical pickup, an adhesive is applied between an optical waveguide device and a wedge-shaped device fixing member, and an adhesive is applied between the wedge-shaped device fixing member and a stem. After the position of the optical waveguide device is adjusted in three-dimensional directions of an optical axis direction and directions orthogonal to the optical axis by moving the wedge-shaped device fixing member, the optical waveguide device and the wedge-shaped device fixing member are fixed.

Optical pickup having optical waveguide device fixed on stem with wedge-shaped device fixing member interposed and method of manufacturing the same

A magnetic recording/reproducing apparatus compares speed information obtained by speed detecting means for a magnetic tape with a set travelling speed of the magnetic tape in a control circuit, and controls the rotational frequency of a driving motor for a take-up reel, thereby controlling constant-speed travelling of the magnetic tape, with employment of no capstan. According to this system, the overall apparatus can be simplified and miniaturized with reduction in weight and cost. Further, it is possible to improve constant-speed travelling performance of the magnetic tape by adjusting resonance and antiresonance appearing due to total equivalent inertia moment related to the magnetic tape and reels in the transfer characteristic of the control system.

Magnetic recording/reproducing apparatus

Growing community of inventors

Yamatotakada, Japan

Akihito Yoshimoto