Patents Assigned to dSam Ltd.
  • Cinematograph camera flicker control and/or indicating device
    Patent number: 4669840
    Abstract: A cinematograph camera flicker indicating or control device uses a microprocessor to determine the combinations of camera speed and/or exposure period, or shutter opening, which will be likely to cause unacceptably uneven exposure of successive frames when filming is carried out under AC powered light sources. An alarm may be activated; alternatively, the camera speed and/or the exposure period and/or the lighting frequency may be automatically controlled by the microprocessor to eliminate or reduce such uneven exposure.
    Type: Grant
    Filed: June 26, 1986
    Date of Patent: June 2, 1987
    Assignee: dSam Ltd.
    Inventor: David Samuelson