Patent ID: 8150220
Filing Date: 2012-04-03
Classification: G02B,G06F

Abstract:
1. An optical waveguide with a light-emitting element comprising: a light-emitting element; and an optical waveguide including a core for guiding light emitted from the light-emitting element to generate a plurality of light beams, wherein the core comprises: a main path; and a plurality of branched paths branched at a plurality of branched points from the main path, wherein the main path has two sides, in which one side has a plurality of branched points and the other side does not have any branched points, the one side having a plurality of branches points and the other side without branched points are faced to each other, wherein the plurality of branched points are provided on a straight line substantially parallel to a light guiding direction of the main path, wherein the width of the main path becomes narrower as the main path moves away from the light-emitting element, wherein an angle a formed by the main path and the light guiding direction of the main path is 0.1° to 2.0° in each branched point where each branched path is branched from the main path, wherein an angle θ formed by the other side without branched points in the main path and the light guiding direction of the main path is 0.3° to 1.7°, and further wherein the plurality of light beams emitted from tips of the plurality of branched paths are parallel to one another at least in a portion thereof.