Patent ID: 7260131
Filing Date: 2007-08-21
Classification: G02B,H01S

Abstract:
1. A symmetrization device for an input light beam having a plurality of beamlets parallely propagating along a propagation direction, said light beam having a cross-section plane perpendicular to said propagation direction defined by perpendicular first and second axes, each beamlet further having a cross-section shape in said cross-section plane and a divergence associated with each of said first and second axes, the device comprising a plurality of lens components disposed adjacent to each other, each of said lens components comprising: an input surface for receiving at least one of said beamlets transversally thereto, the input surface having a curved profile along the propagation direction and a contour in the cross-section plane; and an output surface for outputting said at least one beamlet, disposed in correspondence with the input surface at a predetermined distance therefrom, the output surface having a curved profile in the propagation direction and a contour in the cross-section plane; wherein the curved profiles of the input and output surfaces and the predetermined distance therebetween are selected to collectively permute the divergence associated with the first and second axes of said at least one beamlet, and the contours of the input and output surfaces substantially match the cross-section shape of said at least one beamlet thereat.