Rotating scanning method for data reading e.g. bar code scanner includes mirror facets movable between two position depending on motor speed

摘要

The method includes a polygon mirror assembly (100) with mirror facets (104,106) connected to a base (105). Depending on speed of the motor (110) the facets moves between first position (122,124) and second position (122',124') due to centrifugal force to provide multiple reflective angles. An Independent claim includes a scanning system.