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Servo control of the position and size of an optical scanning system

Servo control of the position and size of an optical scanning system

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A method of controlling the position and size of a television-type raster relative to arbitrary references by means of four servo mechanisms is described. One of the applications of such a system is that of a reading device for punched cards. A system for reading any one of a stack of cards without removing the selected card has been developed using the servo-controlled raster. The design of the servo mechanisms for this application is described in detail.

References

    1. 1)
      • Automatic Strobes and Recurrence Frequency Selectors
    2. 2)
      • Universal High Speed Digital Computers: A Small Scale Experimental Machine
    3. 3)
      • A Storage System for Use with Binary Digital Computing Machines
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Servo control of the position and size of an optical scanning system
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