Patent ID: 6932274
Filing Date: 2005-08-23
Classification: G02B,G06K

Abstract:
1. An arrangement for reducing vibration in a reader for electro-optically reading indicia, comprising: a) a support; b) a movable scan component for scanning the indicia and mounted on the support for oscillating movement about a first axis; c) a movable counterweight mounted on the support for oscillating movement about a second axis; and d) a drive including a first permanent magnet mounted on the scan component for joint movement therewith, a second permanent magnet mounted on the counterweight for joint movement therewith, and an energizable electromagnetic coil mounted between the magnets and operative, when energized by a periodic drive signal, to magnetically interact with the magnets and cause the scan component and the counterweight to move with oppositely directed moments that counterbalance each other, thereby minimizing vibration propagation to the support.