Compact dual optical and scan modules in bar code readers

摘要

A first module, including a laser for emitting a laser beam and a photodiode for detecting light reflected from a bar code symbol, is independently mounted on a motherboard in a spaced relation to a second module which includes a movable reflector and a drive for moving the reflector. The reflector is advantageously mounted for oscillation on a pair of taut elements constituting an endless band.