DEVICE FOR RATIONALIZING IMAGE PICKUP TUBE BEAM FOCUS

• Main Authors: KATASE WATARU, NAKAGAKI SHINTARO, ICHIMURA HIROSHI, KITAMI KAORU, NEGISHI ICHIRO, OSADA MASARU, TAKANASHI RYOYU
• Format: Patent
• Language: English
• Published: 10.08.1989
• Subjects: ELECTRIC COMMUNICATION TECHNIQUE; ELECTRICITY; PICTORIAL COMMUNICATION, e.g. TELEVISION

PURPOSE:To constantly attain a rational focus by changing the focus electric pole voltage of a pickup tube by only a prescribed quantity corresponding to the generation period of a signal for a signal level detection and controlling the focus electric pole voltage in the direction of the enlargement...