static conditions or as a result of dynamic movements capable of deflecting a beam over a total mechanical angle of at least 4 u00b0 mechanical capable of deflecting a beam at frequencies gt 1 5 khz capable of being driven by different types of command signals including those necessary for raster scanning and ones consisting of amplitude modulated sine or modified sine wave functions devices that meet or exceed these criteria are described below the torque required to move a large mirrored surface through a significant mechanical angle can be achieved using two or more closed loop galvanometers to drive a single reflective surface an example of a suitable galvanometer is model 6215 commercially available from cambridge technology cambridge mass with modifications to the electronic control circuitry cooling of the galvanometer case to increase heat transfer and use of u201c intelligent control u201d non raster command signals the frequency response of these galvanometers can be extended to exceed 5 khz in one embodiment of a beam steering device shown in fig1 two galvanometers 101 102 are mounted orthogonally to one another energy is transmitted to the support platform 104 by rotation of the central shafts 105 of each galvanometer 101 102 dissipation of thermal energy generated by operation of the galvanometers is accelerated by a heat sink 103 in which cooled water enters an interior chamber via an inlet 108 flows around the.