Methods and systems for projecting images at greater than...

H - Electricity – 04 – N

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H04N 9/31 (2006.01) G02B 13/06 (2006.01) G02B 27/02 (2006.01) G02B 27/18 (2006.01) G03B 21/00 (2006.01) G09F 19/00 (2006.01)

Patent

CA 2442611

An optical projection system includes an image source (36) that is configured to generate an array of image pixels. A lens assembly (30) is configured to project the array of image pixels onto a hemispherical surface at a projection angle greater than 180~. The lens assembly may include a wide-angle lens assembly (34) and an image relay lens assembly (32) that is configured to reduce dispersion in the array of image pixels between the image source and the wide-angle lens assembly. The wide-angle lens assembly may include a meniscus lens assembly (44) and a wavefront shaping lens assembly (42). The lens assembly may be further configured to project the array of image pixels onto the hemispherical surface such that there is a constant angular separation between adjacent image pixels. An optical projection system may also include two image sources that are configured to generate first and second arrays of image pixels and two lens assemblies that are configured to respectively project the first and second arrays of image pixels at projection angles that are greater than 180~ onto a surface in opposite directions of each other. The combination of the first and second arrays of image pixels may cover a continuous, 360~ portion of the hemispherical surface.

L'invention concerne un système de projection optique qui comprend une source d'image (36) qui est configurée pour générer une matrice de pixels. Un ensemble objectif (30) est configuré pour projeter la matrice de pixels sur une surface hémisphérique à un angle de projection supérieur à 180·. L'ensemble objectif peut comprendre un ensemble lentille grand angle (34) et un ensemble lentille relais d'image (32) qui est configuré pour réduire la dispersion de la matrice de pixels entre la source d'image et l'ensemble lentille grand angle. L'ensemble lentille grand angle peut comprendre un ensemble lentille convexo-concave (44) et un ensemble lentille de mise en forme de fronts d'onde (42). L'ensemble objectif peut en outre être configuré pour projeter la matrice de pixels sur la surface hémisphérique de telle sorte qu'il y ait une séparation angulaire constante entre les pixels adjacents. Un système de projection optique peut également comprendre deux sources d'image qui sont configurées pour générer une première matrice de pixels et une seconde matrice de pixels, ainsi que deux ensembles objectifs qui sont configurés pour projeter, respectivement, la première et la seconde matrice de pixels à des angles de projection supérieurs à 180·, sur une surface, dans des sens opposés. La combinaison de la première et de la seconde matrice de pixels peut couvrir une partie continue de 360· de la surface hémisphérique.

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