Integrated Camera System Having Two Dimensional Image Capture and Three Dimensional Time-of-Flight Capture With A Partitioned Field of View

Patent metadata

Field	Value
Publication number	US-2017374355-A1
Application number	US-201715693553-A
Country	US
Kind code	A1
Filing date	Sep 1, 2017
Priority date	Dec 22, 2014
Publication date	Dec 28, 2017
Grant date	—

Abstract

An apparatus is described that includes an integrated two-dimensional image capture and three-dimensional time-of-flight depth capture system. The three-dimensional time-of-flight depth capture system includes an illuminator to generate light. The illuminator includes arrays of light sources. Each of the arrays is dedicated to a particular different partition within a partitioned field of view of the illuminator.

First claim

1 . (canceled)

2 . A depth camera comprising:
an illuminator having a field of view and comprising a plurality of arrays of light sources, wherein each array of light sources is associated with a respective sub-region of the field of view; an optical element comprising (i) a planar, source surface that faces the illuminator, (ii) a planar, emission surface that is obverse to the source surface, and (iii) a plurality of arrays of micro-lenses positioned on the source surface, wherein each micro-lens is aligned with a respective light source, and wherein each micro-lens collects light emitted by its aligned light source and causes the light to be less divergent internal to the optical element, and wherein the optical element directs light emitted from the light sources of each array to a respective sub-region of the field of view that is associated with the array; and an image sensor configured to receive light that is (i) emitted by the illuminator, and (ii) reflected by an object of interest.

3 . The depth camera of claim 2 , comprising:
a housing for mounting the optical element over the illuminator.

4 . The depth camera of claim 2 , wherein the illuminator is mounted on a semiconductor chip.

5 . The depth camera of claim 2 , wherein the light sources comprise light-emitting-diodes (LEDs) or vertical cavity surface emitting lasers (VCSELs).

6 . The depth camera of claim 2 , wherein the optical element further comprises (iv) a plurality of exit lenses positioned on the emission surface, wherein each exit lens is aligned with a respective array of light sources.

7 . The depth camera of claim 6 , wherein each exit lens exhibits a rounded, convex shape.

8 . The depth camera of claim 6 , wherein each exit lens exhibits a trapezoidal shape.

9 . The depth camera of claim 2 , wherein the optical element is formed from a material that is translucent in the infrared spectrum.

10 . The depth camera of claim 2 , wherein the optical element is formed using a multi-layered structure.

11 . A device comprising:
an optical element comprising (i) a planar, source surface that faces an illuminator, (ii) a planar, emission surface that is obverse to the source surface, and (iii) a plurality of arrays of micro-lenses positioned on the source surface, wherein each micro-lens is aligned with a respective light source of an array of light sources of the illuminator, and wherein each micro-lens collects light emitted by its aligned light source and causes the light to be less divergent internal to the optical element, and wherein the optical element directs light emitted from the light sources of each array to a respective sub-region of the field of view that is associated with the array.

12 . The device of claim 11 , wherein the optical element further comprises (iv) a plurality of exit lenses positioned on the emission surface, wherein each exit lens is aligned with a respective array of light sources.

13 . The device of claim 12 , wherein each exit lens exhibits a rounded, convex shape.

14 . The device of claim 12 , wherein each exit lens exhibits a trapezoidal shape.

15 . The device of claim 11 , wherein the optical element is formed from a material that is translucent in the infrared spectrum.

16 . The device of claim 11 , wherein the optical element is formed using a multi-layered structure.

17 . A device comprising:
an illuminator having a field of view and comprising a plurality of arrays of light sources, wherein each array of light sources is associated with a respective sub-region of the field of view, and wherein each light source emits light that is collected by a respective micro-lens that is aligned with the light source.

18 . The device of claim 17 , comprising:
a housing for mounting an optical element over the illuminator.

19 . The device of claim 17 , wherein the illuminator is mounted on a semiconductor chip.

20 . The device of claim 17 , wherein the light sources comprise light-emitting-diodes (LEDs) or vertical cavity surface emitting lasers (VCSELs).

Assignees

• Google Inc

Inventors

• Ko Jamyuen
• Wan Chung Chun

Classifications

• H04N23/57

  Mechanical or electrical details of cameras or camera modules specially adapted for being embedded in other devices · CPC title

• H04N23/56

  provided with illuminating means · CPC title

• H04N13/254 Primary

  in combination with electromagnetic radiation sources for illuminating objects · CPC title

• H04N2213/001

  Constructional or mechanical details · CPC title

• H04N13/289

  Switching between monoscopic and stereoscopic modes · CPC title