Patent ID: 9036158
Filing Date: 2015-05-19
Classification: G01B,G01S,G02B

Abstract:
1. A pattern projector, comprising: a planar carrier; a light source, which is mounted on a surface of the planar carrier and is configured to emit a beam of light in a direction parallel to the surface; and a transparent substrate, which has a pair of first and second mutually-opposed planar surfaces and has mutually-opposed first and second edges extending between the planar surfaces, wherein the transparent substrate is mounted on the planar carrier along the first planar surface and is configured to receive the beam through the first edge and propagate the beam within the substrate by total internal reflection between the planar surfaces, and which comprises a diffractive structure that is formed on the second planar surface and is configured to direct at least a part of the beam to propagate out of the substrate in a direction that is angled away from the second planar surface and to create a pattern comprising multiple interleaved light and dark areas.