MANIFOLD FOR COLLIMATING LIGHT

摘要

The present disclosure provides systems, methods and apparatus to collimate light. In one aspect, a manifold to collimate light can be used to illuminate a display or project an image. The manifold can be formed of optically transmissive material and can have a backside for receiving light from a light source and a front wall, opposite the backside, for outputting collimated light. The front wall can include a plurality of lens. The upper and bottom walls of the manifold can extend along a curve from the backside to the front wall. The manifold can be hollowed, with an internal cavity that opens to the backside. The manifold can be configured to collimate light propagating in directions extending out of a plane, while light propagating from the light source in directions within the plane is not collimated or is less collimated.