Patent ID: 7227127
Filing Date: 2007-06-05
Classification: G02B,G02F

Abstract:
1. A system for controlling the lateral position and collimation of a light beam comprising: a first acousto-optic deflector capable of changing the collimation of the light beam and deflecting the light beam in a first lateral direction; a second acousto-optic deflector capable of changing the collimation of the beam and deflecting the light beam in a second lateral direction; a first acoustic wave propagated through said first acousto-optic deflector, said first acoustic wave having a frequency gradient across said first acousto-optic deflector; a second acoustic wave propagated through said second acousto-optic deflector, wherein: said second acoustic wave is effectively counter-propagating to said first acoustic wave; said second acoustic wave has a frequency gradient across said second acousto-optic deflector and said second acoustic wave has a frequency with an offset from said first acoustic wave frequency.