Process and apparatus for generating at least three light...

G - Physics – 02 – F

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Details

G02F 1/39 (2006.01) G02B 27/18 (2006.01) G02F 1/35 (2006.01) H04N 9/31 (2006.01)

Patent

CA 2252674

The invention relates to a method and device for producing at least three light bundles (64, 66, 90) of differing wavelengths for a color display, wherein one of the light bundles (66) has the longest wavelength and another light bundle (64) has the shortest wavelength obtained using an OPO (56) and other non-linear optical components from a signal and/or idler beam (58, 60) of said OPO (56) and/or of a primary light bundle (5), from which a beam (52) which excites the OPO (56) is also derived. The invention provides for separation of at least one partial light bundle (52) from the primary light bundle (50) to excite the OPO (56). Both the light bundle (64) with the longest wavelength and the light bundle (66) with the shortest wavelength are obtained from the signal and/or idler beam (58, 60) of the OPO (56) by means of frequency upconversion and/or frequency mixing with another partial light bundle of the primary light bundle (50), excluding components other than the ones with the longest and shortest wavelengths, to display the light bundles (90) produced.

L'invention concerne un procédé et un dispositif permettant de produire au moins trois faisceaux lumineux (64, 66, 90) de différentes longueurs d'ondes pour une représentation couleur. Un (66) de ces faisceaux présente une plus grande longueur d'ondes et un autre (64), une plus courte, obtenue à l'aide d'un oscillateur à paramétrie optique (OPO) (56) et d'autres composants optiques non linéaires, à partir d'un faisceau de signaux et/ou d'un faisceau idler (58, 60) de l'OPO (56) et/ou d'un faisceau lumineux primaire (50) d'où est également dérivé un faisceau (52) excitant l'OPO (56). Il est prévu de séparer au moins un faisceau lumineux partiel (52) du faisceau lumineux primaire (50) pour exciter l'OPO (56). Il est également prévu que le faisceau lumineux (64) ayant la plus grande longueur d'ondes, tout comme le faisceau lumineux (66) ayant la plus courte longueur d'ondes soient dérivés du faisceau de signaux et/ou du faisceau idler (58, 60) de l'OPO (56) en raison de la multiplication des fréquences et/ou du mélanges de fréquences avec un autre faisceau lumineux partiel du faisceau lumineux primaire (50), à l'exclusion de composantes autres que celles de la plus courte et de la plus grande longueur d'ondes pour représenter les faisceaux lumineux (90) produits.

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