Optical reading apparatus having a reading sensor of electronic scanning type

摘要: In an optical reading apparatus having a sensor for converting optically readable information into electrical signal by electronically scanning image of information, such as bar code, detector is provided to detect the intensity light incident on label which provided. Data indicative used determine subsequent period in manner that shortened when increases or vice versa. Since decrease results lower output voltage from sensor, undesirable saturation circuitry following effectively prevented, providing stable operation code reader.