Reflectometer and associated light source for use in a...

G - Physics – 01 – N

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G01N 21/47 (2006.01)

Patent

CA 2584529

A light source for a reflectometer which is used in a chemical analyzer includes a plurality of light emitting devices. Some of the light emitting devices emit light of different wavelengths. The light emitting devices are arcuately arranged about a circle having a predetermined radius. Adjacent light emitting devices are spaced from each other a predetermined distance. The light emitting devices are positioned to direct light emitted therefrom to an illumination plane. At least two, but preferably three or four, of the light emitting devices emit light of substantially the same wavelength and are illuminated simultaneously to provide a volume of substantially homogenous irradiance at the illumination plane.

L'invention concerne une source lumineuse pour réflectomètre s'utilisant dans un analyseur chimique, qui comprend une pluralité de dispositifs électroluminescents. Certains des dispositifs électroluminescents émettent de la lumière présentant différentes longueurs d'onde. Les dispositifs électroluminescents sont placés en arc autour d'un cercle de rayon prédéterminé. Les dispositifs électroluminescents adjacents sont espacés les uns des autres selon une distance prédéterminée. Les dispositifs électroluminescents sont positionnés de façon à diriger la lumière émise vers un plan d'éclairage. Au moins deux, mais de préférence trois ou quatre des dispositifs électroluminescents émettent une lumière présentant sensiblement la même longueur d'onde, et s'illuminent simultanément afin de former un volume d'éclairement énergétique sensiblement homogène sur le plan d'éclairage.

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