公开(公告)号：US4221992A

公开(公告)日：1980-09-09

申请号：US935496

申请日：1978-08-18

申请人： Joji Ueda ,  Hiroshi Hisamatsu ,  Yoshio Takamura

发明人： Joji Ueda ,  Hiroshi Hisamatsu ,  Yoshio Takamura

IPC分类号： H01J29/46 ,  H04N9/093 ,  H01J31/26

CPC分类号： H04N9/093

摘要： A scanning area rotation device for an image pick-up tube is provided with a focusing coil enclosing the image pick-up tube and a rotation coil surrounding the vicinity of the target face of the image pick-up tube. A first integration value is calculated by integrating a magnetic flux density, which is developed by the focusing coil, distributing from the target face toward an electron gun of the image pick-up tube with respect to a distance along a tube axis of the image pick-up tube. A second integration value is calculated by integrating a magnetic flux density, which is developed by the rotation coil, distributing from the target face toward the electron gun with respect to a distance along the tube axis. In order to rotate the scanning-area on the target face without off-focusing of the electron beams scanned on the target face, current flowing through the rotation coil has a value allowing the ratio of the second to first integration value to be less than 1/100 in absolute value.

摘要翻译： 用于摄像管的扫描区域旋转装置设置有包围摄像管的聚焦线圈和围绕摄像管的目标面附近的旋转线圈。 通过将由聚焦线圈展开的磁通密度相对于图像拾取器的管轴的距离从目标面朝向摄像管的电子枪分配来计算第一积分值 上管。 通过将由旋转线圈展开的磁通密度相对于沿着管轴的距离从目标面朝向电子枪分布来计算第二积分值。 为了在目标表面上旋转扫描区域而不会在目标面上扫描的电子束的聚焦，流过旋转线圈的电流具有允许第二至第一积分值的比率小于1的值 / 100绝对值。