Patent ID: 9057784
Filing Date: 2015-06-16
Classification: G01S,G02B

Abstract:
1. A time-of-flight depth camera, comprising: a light source configured to generate coherent light; a first optical stage including an array of periodically-arranged lens elements positioned to receive at least a portion of the coherent light, the first optical stage adapted to diverge the portion of the coherent light to form divergent light characterized by a light profile that is more intense farther from an optical axis of the divergent light than closer to the optical axis of the divergent light; a second optical stage positioned to receive at least a portion of the divergent light, the second optical stage adapted to reduce an intensity of one or more diffraction artifacts in the divergent light to form illumination light to be projected into an illumination environment; and an image sensor configured to detect at least a portion of return illumination light reflected from the illumination environment.