Direct write holographic printer

G - Physics – 03 – H

Patent

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Details

G03H 1/26 (2006.01) G02F 1/35 (2006.01) G02F 1/37 (2006.01) G03H 1/24 (2006.01) H01S 3/109 (2006.01) H01S 3/08 (2006.01) H01S 3/11 (2006.01) H01S 3/16 (2006.01)

Patent

CA 2424327

A direct write holographic printer for producing RGB colour reflection holograms is disclosed. A Nd:YLF crystal (1) in a laser cavity is excited to produce an emission at 1313 nm which is frequency converted by doubling to 656.5 nm and by tripling to 437.7 nm. In a separate cavity a similar Nd:YLF crystal (1a) is synchronously or asynchronously excited to produce an emission at 1047.1 nm (or at the related line of 1053 nm) which is frequency converted by doubling to 523.6 nm (or 526.5 nm). The emissions at 437.7 nm and 656.5 nm are combined co-linearly with the emission at 523.6 nm (or 526.5 nm) to produce a single RGB pulsed laser beam.

L'invention concerne une imprimante holographique à inscription directe servant à produire des hologrammes par réflexion RVB. Un cristal Nd:YLF (1) situé dans une cavité laser est excité pour produire une émission à 1313 nm qui est convertie en fréquence par doublement à 656,5 nm et par triplement à 437,7 nm. Dans une cavité séparée, un cristal Nd:YLF similaire (1a) est excité de manière synchrone ou asynchrone afin de produire une émission à 1047,1 nm (ou à la ligne relative de 1053 nm) qui est convertie en fréquence par doublement à 523,6 nm (ou 526,5 nm). Les émissions à 437,7 nm et à 656,5 nm sont combinées de manière colinéaire avec l'émission à 523,6 nm (ou 526,5 nm) afin de produire un seul faisceau laser à impulsion RVB.

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