Patent ID: 7307786
Filing Date: 2007-12-11
Classification: G02B,Y10S

Abstract:
1. A beam shaper for use in connection with a quasi-monochromatic light source, the beam shaper comprising: a transmission element comprising a substantially transparent material, the transmission element being operative to guide propagation of light from the light source with differing ratios of imaging geometry, the transmission element comprising at least in part binary, surface relief diffractive patterns, having local grating periods optimized with respect to longitudinal and transverse directions, and with respect to an optical axis, wherein the local grating period are optimized substantially in accordance with the Bragg diffraction geometry for providing a maximum diffraction efficiency in guiding the propagation of light, wherein guiding the propagation of light comprises at least one of rounding, making elliptical, collimating, diverging or converging, wherein the beam shaper is integrated with the quasi-monochromatic light source, and wherein the beam shaper is arranged directly on and/or around a surface of the light source in an integral structure so as to constitute a protection matrix at least partially enclosing the light source, and wherein