G - Physics
02
B
G02B 5/18 (2006.01) B32B 3/26 (2006.01)
Patent
CA 2431253
The invention relates to a beam shaper, which is intended for use in connection with a quasi-monochromatic light source (1) and which is fabricatedf rom a substantially transparent material as a transmission element (3) guiding the propagation of light for rounding, making elliptical, collimating, diverging, converging and/or for the like application of a light beam/beams (R). The beam shaper has its transmission element (3') guiding the light beam/beams (R) provided with a strucutre which at least partially consists of binary, surface relief type of diffractive patterns, having local grating periods thereof optimized with respect to longitudinal and transverse directions, as well as with respect to an optical axis, essentially in accordance with the Bragg diffraction geometry for providing a maximum diffraction efficiency.
L'invention concerne un organe de mise en forme de faisceau destiné à être utilisé conjointement avec une source de lumière quasi monochromatique (1) et fabriqué à partir d'un matériau sensiblement transparent faisant office d'élément de transmission (3) guidant la propagation de la lumière pour arrondir, rendre elliptique, collimater, faire diverger, converger et/ou similaire un ou plusieurs faisceaux lumineux (R). L'élément de transmission (3') guidant le/les faisceaux lumineux (R) de l'organe de mise en forme de faisceau, comprend une structure consistant au moins partiellement en un type à surface en relief binaire de motifs diffractifs, dont les périodes de réseau gravé sont optimisées par rapport aux sens longitudinal et transversal et par rapport à un axe optique, sensiblement en fonction de la géométrie de diffraction de Bragg, si bien qu'une efficacité de diffraction maximale est assurée.
Hatjasalo Leo
Rinko Kari
Borden Ladner Gervais Llp
Oy Ics Intelligent Control Systems Ltd.
Oy Modines Ltd
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