Hitachi, Ltd.

Nippon Hoso' Kyokai

Hitachi Denshi Kabushiki Kaisha

Hitomi Suzuki

Masakazu Fukushima

Masanori Maruyama

Kentaro Oku

Mitsuhiro Kurashige

Shigehiko Takayama

A magnetic-focus electrostatic-deflection image pickup tube utilizes a magnetic field for electron beam focusing and an electrostatic field for electron beam deflection. The magnetic field generated by a magnetic focus coil is distributed on the tube axis to have the peak of intensity which is offset toward the electron gun. The electron beam can be deflected and focused to provide a minimized beam spot with less distortion.

Image pickup tube

A magnetic focusing and electrostatic deflecting image pickup tube comprises electrostatic deflection electrodes each constituted by a straight arrow pattern yoke composed of straight line segments arrayed in a linear zigzag pattern. The pattern yoke has a twist angle set at a value not greater than 105.degree.. An average value of angles formed by each upper apex and two lower apices adjacent to the upper apex of the zigzag pattern yoke with reference to the axis of the tube lies within a range of 116.degree. to 127.degree..

Cylindrical image pickup tube having electrostatic deflection electrodes

Growing community of inventors

Akishima, Japan

Hitomi Suzuki