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AUTOMATIC MULTIPLE DEPTH CAMERAS SYNCHRONIZATION USING TIME SHARING

  • US 20150373322A1
  • Filed: 01/16/2015
  • Published: 12/24/2015
  • Est. Priority Date: 06/20/2014
  • Status: Active Grant
First Claim
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1. A depth sensing device for capturing an image containing depth information of a scene and for use in a depth sensing system that includes at least one other depth sensing device, comprising:

  • a transmitter capable of projecting light on a scene, the transmitter comprising a laser capable of producing a light beam including a series of laser pulses, each pulse having a pulse length and the series of pulses produced at a pulse frequency, anda receiver coupled to the transmitter at a known relative orientation, the receiver comprising a shutter and a sensor assembly capable of producing an image based on sensing light projected by the transmitter and reflected from the scene; and

    a controller comprising a processor, the controller coupled to the transmitter and the receiver, the controller configured todetermine the presence of light in the scene using the receiver,control the pulse length of the series of laser pulses,control when an exposure window begins during which the transmitter is activated to project light on the scene and activate the receiver to begin sensing light reflected from the scene, the beginning of the exposure window and the pulse length controlled based on the determined presence of the light on the scene from the at least one other depth sensing device so the exposure window is temporally different from when any other of the at least one other depth sensing devices in the system is illuminating the scene.

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