Integrating point source for texture projecting bulb

Patent metadata

Field	Value
Publication number	US-10337691-B2
Application number	US-201715489524-A
Country	US
Kind code	B2
Filing date	Apr 17, 2017
Priority date	Jun 10, 2016
Publication date	Jul 2, 2019
Grant date	Jul 2, 2019

Abstract

A texture projecting light bulb includes an extended light source located within an integrator. The integrator includes at least one aperture configured to allow light to travel out of the interior of the integrator. In various embodiments, the interior of the integrator may be a diffusely reflective surface and the integrator may be configured to produce a uniform light distribution at the aperture to approximate a point source. The integrator may be surrounded by a light bulb enclosure. In various embodiments, the light bulb enclosure may include transparent and opaque regions configured to project a structured pattern of visible and/or infrared light.

First claim

What is claimed is:

1. A texture projecting light bulb comprising:
an incandescent filament configured to produce infrared light;
an integrating sphere enclosing the incandescent filament, wherein the integrating sphere comprises a diffusely reflective interior surface, a baffle disposed at least partially within the integrating sphere, and an aperture configured to allow light to pass out of the integrating sphere; and
a light bulb enclosure surrounding the integrating sphere, the enclosure comprising one or more regions transmissive to infrared light and one or more regions opaque to infrared light, wherein the one or more transmissive regions are configured to project a structured light pattern of infrared light detectable by a computer vision system.

2. A texture projecting light bulb comprising:
a light source;
an integrator surrounding the light source, the integrator comprising an interior surface and at least one aperture, wherein the interior surface of the integrator is at least partially coated with a specularly reflective coating; and
an enclosure surrounding the integrator, wherein at least a portion of the enclosure is translucent.

3. The light bulb of claim 2 , wherein the light source is configured to produce infrared light.

4. The light bulb of claim 2 , wherein the light source is configured to produce visible light.

5. The light bulb of claim 2 , wherein the light source is configured to produce a combination of infrared and visible light.

6. The light bulb of claim 2 , wherein the integrator comprises an integrating sphere.

7. The light bulb of claim 2 , wherein the integrator comprises an integrating cube.

8. The light bulb of claim 2 , wherein the interior surface of the integrator comprises a specularly reflective material.

9. The light bulb of claim 2 , wherein the interior surface of the integrator comprises a diffusive material.

10. The light bulb of claim 2 , wherein the interior surface of the integrator is at least partially coated with a diffusive coating.

11. The light bulb of claim 2 , wherein the light source comprises an incandescent filament.

12. The light bulb of claim 2 , wherein the light source comprises a light-emitting diode.

13. The light bulb of claim 2 , wherein the light source comprises a gas-discharge element.

14. The light bulb of claim 2 , wherein the light source comprises an arc light.

15. The light bulb of claim 2 , wherein at least a portion of the enclosure comprises a material reflective to infrared wavelengths and transparent to visible light.

16. The light bulb of claim 2 , wherein at least a portion of the enclosure is opaque.

17. The light bulb of claim 2 , wherein at least a portion of the interior surface of the enclosure is capable of absorbing light.

18. The light bulb of claim 2 , wherein the translucent region of the enclosure is configured to project a structured light pattern.

19. The light bulb of claim 2 , wherein at least a portion of the enclosure is spherical.

20. The light bulb of claim 19 , wherein the aperture of the integrator is located at a center of the spherical portion of the enclosure.

21. The light bulb of claim 2 , further comprising a base configured to be mechanically and electrically connected to a light bulb socket.

22. The light bulb of claim 21 , where the base comprises a threaded base.

23. The light bulb of claim 2 , further comprising a baffle disposed at least partially within the integrator.

24. A texture projecting light bulb comprising:
a light source;
an integrator surrounding the light source, the integrator comprising an interior surface and at least one aperture;
a baffle disposed at least partially within the integrator; and
an enclosure surrounding the integrator, wherein at least a portion of the enclosure is translucent.

25. The light bulb of claim 24 , wherein at least a portion of the baffle is located along a straight line path between the light source and the aperture.

26. The light bulb of claim 24 , wherein the baffle intersects every straight line path between the light source and the aperture.

27. The light bulb of claim 24 , wherein the baffle comprises a specularly reflective surface.

28. The light bulb of claim 24 , wherein the baffle comprises a diffusely reflective surface.

Assignees

• Magic Leap Inc

Inventors

• Kaehler Adrian
• Bradski Gary

Classifications

• H04N13/344

  with head-mounted left-right displays · CPC title

• F21K9/68

  Details of reflectors forming part of the light source · CPC title

• H04N13/395

  with depth sampling, i.e. the volume being constructed from a stack or sequence of two-dimensional [2D] image planes · CPC title

• F21V3/02 Primary

  characterised by the shape · CPC title

• H04N13/383

  for tracking with gaze detection, i.e. detecting the lines of sight of the viewer's eyes · CPC title