Abstract
AbstractIn this paper, we present an original acousto‐optic device which allows to separate an arbitrary polarised incident light beam into two orthogonally polarised diffracted beams. This device operates with a single frequency ultrasonic wave and the two diffracted orders are frequency up and down shifted, respectively. A birefringent crystal of Paratellurite has been chosen for experimental validation due to its very high acousto‐optic figure of merit for the slow acoustic shear wave. This device has been conceived in order to be implemented in a optical modulation line of a stereoscopic laser videoprojector based on the simultaneous projection of the two left and right images orthogonally polarised. Special polarising glasses select the two images for each eye. The projection is based on a X‐Y scanning of a laser beam which is both intensity and polarisation modulated. The “on‐line” separator allows to dynamically control and minimize the “ghost” phenomenon of a such a stereoscopic system.
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