Inexpensive PIN diode detector samples screen brightness between camera frames generating error signal for feedback control of intensity. System was tested by taking flat-field exposures at several density levels over 4 hour period. Results showed processed film density levels varied by less than + or - 10 percent usually centering around + or - 8 percent.


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    Title :

    Z-axis control loop for cathode-ray tubes


    Contributors:

    Published in:

    Publication date :

    1979-01-01



    Type of media :

    Miscellaneous


    Type of material :

    No indication


    Language :

    English




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