Illumination system and method for spatial modulators

G - Physics – 02 – B

Patent

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Details

G02B 27/09 (2006.01) B41J 2/45 (2006.01) G02B 27/10 (2006.01) G02B 27/14 (2006.01) G02B 27/16 (2006.01) G06K 15/12 (2006.01) H04N 1/12 (2006.01) H04N 1/401 (2006.01) G03F 7/20 (2006.01)

Patent

CA 2328954

The present invention is directed to a system and a method for illuminating imaging radiant energy from a laser source onto a spatial modulator. It comprises means or a step of focusing the radiant energy from the laser source at a focal point. There is further provided a mixing means mixing the radiant energy substantially at or downstream the focal point, the mixing means having an input, a plurality of reflecting surfaces and an output, wherein the reflecting surfaces are arranged so that upon entry of the radiant energy into the input of the mixing means the radiant energy is subjected to multiple reflections and at the output the distribution of the radiant energy is substantially uniform.

La présente invention a trait à un système et à un procédé visant à éclairer un modulateur spatial à l'aide d'énergie rayonnée d'imagerie provenant d'une source laser. Le procédé comporte un moyen ou une étape de concentration, sur un foyer, de l'énergie rayonnée provenant de la source laser. Un moyen mélangeur également prévu mélange l'énergie rayonnée pratiquement au foyer ou en aval du foyer, le moyen mélangeur comportant une entrée, plusieurs surfaces réfléchissantes et une sortie. Les surfaces réfléchissantes sont aménagées de sorte que lorsque l'énergie rayonnée pénètre dans l'entrée du moyen mélangeur, elle subit de multiples réflexions, et qu'à la sortie la répartition de l'énergie rayonnée est sensiblement uniforme.

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