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1. 发明授权

US4682077A Television camera tube device 失效
标题翻译：电视摄像管设备
公开(公告)号：US4682077A
公开(公告)日：1987-07-21
申请号：US755014
申请日：1985-07-15
申请人： Masanori Maruyama , Masamichi Moriya , Shinichi Kato , Masakazu Fukushima , Yasuhiko Nonaka , Chihaya Ogusu
发明人： Masanori Maruyama , Masamichi Moriya , Shinichi Kato , Masakazu Fukushima , Yasuhiko Nonaka , Chihaya Ogusu
IPC分类号： H01J29/46 , H01J29/48 , H01J29/52 , H04N5/228
CPC分类号： H01J29/488
摘要： A camera tube device for use in a television camera comprises an electron gun including a cathode electrode for emission of an electron beam, and first and second grid electrodes respectively having apertures for controlling the diameter of the electron beam. The aperture of the second grid electrode is sufficiently smaller than the aperture of the first grid electrode. The first grid electrode is applied with a positive voltage relative to the cathode electrode and the second grid electrode is applied with a positive voltage relative to the cathode electrode which is higher than that applied to the first grid electrode. The positive voltage applied to the first grid electrode has such a value that forms the electron beam having passed through the aperture of the first grid electrode into a laminar flow beam. As the level of brightness of the object increases, the positive voltage applied to the first grid electrode is decreased to increase the amount of electron beam passing through the aperture of the second grid electrode.
摘要翻译：用于电视摄像机的相机管装置包括电子枪，其包括用于发射电子束的阴极，以及分别具有用于控制电子束直径的孔的第一和第二栅电极。第二栅电极的孔径比第一栅电极的孔径小得多。第一栅电极相对于阴极被施加正电压，并且第二栅极施加相对于阴极的正电压，其高于施加到第一栅电极的正电压。施加到第一栅电极的正电压具有这样的值，其形成已经通过第一栅电极的孔的电子束成层流束。当物体的亮度水平增加时，施加到第一栅极的正电压减小，以增加通过第二栅电极的孔径的电子束的量。

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