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    Sec camera tube and image intensifier protection against excessive light damage
    1.
    发明授权
    Sec camera tube and image intensifier protection against excessive light damage 失效
    SEC相机管和图像增强器防止过度光损坏

    公开(公告)号：US3706903A

    公开(公告)日：1972-12-19

    申请号：US3706903D

    申请日：1969-11-03

    申请人： HUGHES AIRCRAFT CO

    发明人： HANSEN JAY M ,  HOLSCHER DONALD J ,  PRINCE PAUL R

    IPC分类号： H01J31/50 ,  H04N5/228 ,  H01J31/48

    CPC分类号： H01J31/50 ,  H01J2231/50089 ,  H04N5/228

    摘要： Protection of a low level television camera tube used with an image intensifier tube is provided by a shutter and a current limiting element in series with the photocathode of the image intensifier tube to cause the electron image in the intensifier to defocus, thereby providing protection for the camera tube while the shutter is being closed. A current limiting element in series with the photocathode of the camera tube further aids in protecting the target of the camera tube by reducing the kinetic energy of photoelectrons produced in response to a light image from the intensifier. A photodetector responds to excessive illumination to cause a control circuit to close the shutter.

    摘要翻译： 与图像增强管一起使用的低电平电视摄像机管的保护由与图像增强管的光电阴极串联的快门和限流元件提供，以使增强器中的电子图像散焦，从而为 相机管，同时快门关闭。 与相机管的光电阴极串联的限流元件还有助于通过减少响应于来自增强器的光图像而产生的光电子的动能来保护照相机管的目标。 光电探测器响应过度照明，使控制电路关闭快门。