Holographic optical elements for augmented reality devices and methods of manufacturing and using the same

Patent metadata

Field	Value
Publication number	US-2022035166-A1
Application number	US-202117500137-A
Country	US
Kind code	A1
Filing date	Oct 13, 2021
Priority date	Sep 24, 2018
Publication date	Feb 3, 2022
Grant date	—

Abstract

Holographic optical elements for augmented reality (AR) devices and methods of manufacturing and using the same are disclosed. A disclosed system includes a holographic optical element (HOE), and a first light source to direct a first beam of light toward the HOE from a first direction. The first beam of light is collimated. The disclosed system further includes a second light source to direct a second beam of light toward the HOE from a second direction. The disclosed system also includes a decollimation lens positioned between the first light source and the HOE. The decollimation lens is to decollimate the first beam of light.

First claim

What is claimed is:

1 . A system comprising:
a holographic optical element (HOE); a first light source to direct a first beam of light toward the HOE from a first direction, the first beam of light being collimated; a second light source to direct a second beam of light toward the HOE from a second direction; and a decollimation lens positioned between the first light source and the HOE, the decollimation lens to decollimate the first beam of light.

2 . The system as defined in claim 1 , wherein a focal length of the decollimation lens defines a focal point for chief rays of sub-images to be reflected off the HOE from a projector.

3 . The system as defined in claim 2 , wherein the decollimation lens is a diverging lens, the diverging lens positioned between the focal point for the chief rays and the HOE.

4 . The system as defined in claim 3 , wherein the second beam of light is to converge towards a second focal point, the second focal point defining a location for the projector.

5 . The system as defined in claim 2 , wherein the decollimation lens is a converging lens, the HOE positioned between the focal point for the chief rays and the converging lens.

6 . The system as defined in claim 5 , wherein the second beam of light is to diverge outward from a second focal point, the second focal point defining a location for the projector.

7 . The system as defined in claim 2 , further including a lens array positioned between the decollimation lens and the HOE, the lens array to focus separate portions of the first beam of light to separate focal points on a focal plane between the focal point for the chief rays and the HOE.

8 . A method comprising:
positioning a decollimation lens adjacent to a holographic optical element (HOE); transmitting a first beam of light through the decollimation lens towards a first side of the HOE; and transmitting a second beam of light towards a second side of the HOE.

9 . The method as defined in claim 8 , defining a focal point for chief rays of sub-images to be reflected off the HOE from a projector based on a focal length of the decollimation lens.

10 . The method as defined in claim 9 , further including positioning the decollimation lens between the focal point for the chief rays and the HOE, the decollimation lens being a diverging lens.

11 . The method as defined in claim 10 , wherein the second beam of light is to converge towards a second focal point, the method further including defining a location for the projector based on a location of the second focal point.

12 . The method as defined in claim 9 , further including positioning the HOE between the focal point for the chief rays and the decollimation lens, the decollimation lens being a converging lens.

13 . The method as defined in claim 12 , wherein the second beam of light is to diverge from a second focal point, the method further including defining a location for the projector based on a location of the second focal point.

14 . The method as defined in claim 9 , further including positioning a lens array between the decollimation lens and the HOE to focus separate portions of the first beam of light to separate focal points on a focal plane between the focal point for the chief rays and the HOE.

15 . An apparatus comprising:
means for reflecting; means for directing a first beam of light toward the reflecting means from a first direction, the first beam of light being collimated; means for directing a second beam of light toward the reflecting means from a second direction; and means for decollimating light, the light decollimating means positioned between the first beam of light directing means and the reflecting means, the light decollimating means to decollimate the first beam of light.

16 . The apparatus as defined in claim 15 , wherein a focal length of the light decollimating means defines a focal point for chief rays of sub-images to be reflected off the reflecting means from means for projecting.

17 . The apparatus as defined in claim 16 , wherein the light decollimating means is a diverging lens, the diverging lens positioned between the focal point for the chief rays and the reflecting means.

18 . The apparatus as defined in claim 17 , wherein the second beam of light is to converge towards a second focal point, the second focal point defining a location for the projecting means.

19 . The apparatus as defined in claim 16 , wherein the light decollimating means is a converging lens, the reflecting means positioned between the focal point for the chief rays and the converging lens.

20 . The apparatus as defined in claim 19 , wherein the second beam of light is to diverge outward from a second focal point, the second focal point defining a location for the projecting means.

Assignees

• Intel Corp

Inventors

• Masson Jonathan
• Tremblay Eric
• Kilcher Lucio
• Guillaumee Mickael

Classifications

• G02B2027/0125

  Field-of-view increase by wavefront division · CPC title

• G02B2027/0174

  holographic · CPC title

• G03H1/041

  Optical element in the object space affecting the object beam, not otherwise provided for · CPC title

• G02B2027/0178

  Eyeglass type (eyeglass details G02C) · CPC title

• G02B27/0961

  Lens arrays (lens arrays per se G02B3/0006) · CPC title