METHOD AND SYSTEM FOR PROJECTING IMAGES AT PROJECTION ANGLESGREATER THAN 180 DEGREES

摘要

An optical projection system includes an image source (36) that is configure d 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 projecti on 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 projecti on 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 m ay cover a continuous, 360~ portion of the hemispherical surface.