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    SCAN ANGLE COMPENSATOR FOR ELECTRO-OPTICAL LABEL READING SYSTEM
    1.
    发明专利
    SCAN ANGLE COMPENSATOR FOR ELECTRO-OPTICAL LABEL READING SYSTEM 未知

    公开(公告)号：CA1078515A

    公开(公告)日：1980-05-27

    申请号：CA247942

    申请日：1976-03-15

    Applicant: SERVO CORP OF AMERICA

    Inventor： ZUCKERMAN LEONARD

    IPC: G06K7/10 ,  G11B7/00

    Abstract: SCAN ANGLE COMPENSATOR FOR ELECTRO-OPTICAL LABEL READING SYSTEM A scan angle compensator is provided for an electrooptical label reading system of the type comprising apparatus designed to scan an extended range for a coded data label disposed within a portion of the range and a sensor operative in response to light reflected from the label to produce signals representative of the data, wherein the strength of the signals is related to the position of the label within the range. The present compensator includes a function generator the output of which varies inversely to the fluctuation of said signals as said range is scanned and multiplying means receiving as inputs the output of the sensor and function generator and operative to multiply the same so that the amplitude of the output of the multiplier remains constant regardless of the position of the label within the range.

    PULSE WIDTH DETECTION CIRCUIT FOR ELECTRO-OPTICAL LABEL READING SYSTEM
    3.
    发明专利
    PULSE WIDTH DETECTION CIRCUIT FOR ELECTRO-OPTICAL LABEL READING SYSTEM 未知

    公开(公告)号：CA1078062A

    公开(公告)日：1980-05-20

    申请号：CA247887

    申请日：1976-03-15

    Applicant: SERVO CORP OF AMERICA

    Inventor： REISS CHARLES ,  ZUCKERMAN LEONARD

    IPC: B61L25/04 ,  G06K7/10

    Abstract: PULSE WIDTH DETECTION CIRCUIT FOR ELECTRO-OPTICAL LABEL READING SYSTEM A circuit for producing an output pulse of predetermined amplitude and a width equal to the mid amplitude width of an input pulse from an electro-optical label reading system is provided. The present circuit comprises delay line means having a first output terminal and a second output terminal with the signal at the second output terminal being delayed twice the time of the delay at the first terminal. The first output terminal of the delay line is connected to an amplifier operative to double the amplitude of the signal applied thereto. The output of the amplifier is connected to one input of each of first and second comparators with the other input to the comparators respectively connected to the input signal source and the second terminal of the delay line. The output of the comparators is connected to the input to an AND gate with the output from the AND gate providing the desired pulse width information.

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