Patent ID: 9069227
Filing Date: 2015-06-30
Classification: G02B,G02F

Abstract:
1. An acousto-optic lens comprising: a first acousto-optic deflector arranged to support a first acoustic wave; a second acousto-optic deflector arranged to support a counter-propagating second acoustic wave; a driver for synthesizing first and second drive signals for said respective first and second acousto-optic deflectors; wherein said driver is arranged to synthesize a first drive signal that is phase-modulated by a non-sinusoidal first function that is capable of being expressed as a Taylor series having one or more coefficients greater than second order; wherein said driver is arranged to synthesize a second drive signal that is phase-modulated by a non-sinusoidal second function that is capable of being expressed as a Taylor series having one or more coefficients greater than second order; and wherein said acousto-optic lens further comprises: a memory for storing drive parameters associated with respective focal positions in space, wherein said acousto-optic lens is arranged to use said stored drive parameters when it is intended to focus electromagnetic radiation at a respective position in space.