Projector system with light pipe optics

G - Physics – 03 – B

Patent

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Details

G03B 21/14 (2006.01) G02B 6/032 (2006.01) G02B 6/42 (2006.01)

Patent

CA 2348386

A projector system includes a lamp (10), a reflector collector optic (11), relay optics (18, 19) to image light from a light pipe (15) exit pupil to an image gate of an image forming means (21), such as a film gate or an LCD panel. The light pipe is hollow and has cold mirror reflecting internal walls, is tapered in shape, and has an entrance pupil which is larger than a center section in cross section. The light pipe mixes the light by internal reflection and produces light which is uniform in color and intensity across the exit pupil.

L'invention concerne un système de projecteur qui comprend une lampe (10), un dispositif optique collecteur réflecteur (11), des dispositifs optiques relais (18, 19) qui transmettent la lumière provenant d'une pupille de sortie de conduit de lumière (15) à un couloir d'image d'un moyen de formation d'image (21), tel qu'un couloir de film ou un panneau d'affichage à cristaux liquides. Le conduit de lumière est creux, comporte des parois internes réfléchissantes à miroir froid, a une forme conique, et présente une pupille d'entrée qui est plus grande, en section transversale, qu'une section centrale. Le conduit de lumière mélange la lumière par réflexion interne et produit de la lumière d'une couleur et d'une intensité uniformes, à travers la pupille de sortie.

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