Portable laser scanning arrangement for and method of evaluating and validating bar code symbols

摘要: Laser light reflected from a bar code symbol pattern is detected by photodetector mounted in portable scanning head of laser system. By selecting appropriate threshold values on the analog signal generated photodetector, converted to series pulses, each pulse width accurately corresponding scanned pattern. A plurality functions can be determined function being independently selected keyboard entry head, displayed and/or recorded printer remote head. Single line or multiple scans two orthogonal directions relative may selected. bimorph speaker-type oscillatory element utilized as miniature element. Circuitry for synchronizing along both axes, and generating drive uniform, constant velocity manner also disclosed.