Amplitude Control (e.g., Automatic Gain Control) Patents (Class 348/255)
Color tv (e.g., saturation) (Class 348/256)
  • Device and method for controlling the contrast in an image observation system provided with an MCP image intensifier
    Patent number: 5341219
    Abstract: A device for determining a control signal for an image observation system including an image intensifier and an image converter wherein the control signal is representative of the contrast range of an output signal of the image converter and with control elements for adjusting the gain of the image intensifier and the gain of the image converter in a manner whereby the control signal at a value representative of a large contrast range in the output of signal of the converter results in higher adjustment gain of the image intensifier and a lower adjustment gain to the image converter and where the control signal at a value representative of a low contrast range in the output signal of the image converter results in lower adjustment gain to the image intensifier and higher adjustment gain to the image converter.
    Type: Grant
    Filed: November 16, 1992
    Date of Patent: August 23, 1994
    Assignee: B.V. Optische Industrie "De Oude Delft"
    Inventors: Johannes B. J. Schelen, J. van den Berg