Reflective array waveguide

• US 8,917,453 B2
• Filed: 12/23/2011
• Issued: 12/23/2014
• Est. Priority Date: 12/23/2011
• Status: Active Grant

• Current Assignee: Microsoft Technology Licensing LLC (Microsoft Corporation)
• Original Assignee: Microsoft Corporation
• Inventors: Bohn, David D.
• Primary Examiner(s): SAHLE, MAHIDERE S
• Application Number:
  US13/336,895
• Publication Number:
  US 20130163089A1
• Time in Patent Office: 1,096 Days
• Field of Search: 359/13, 359/630, 359/632
• US Class Current: 359/630
• CPC Class Codes: G02B 2027/0132 comprising binocular systems
• CPC Class Codes: G02B 2027/0178 Eyeglass type eyeglass details G02C
• CPC Class Codes: G02B 27/0172 characterised by optical features
• CPC Class Codes: Y10T 156/10 Methods of surface bonding and/or assembly therefor

Abstract

In embodiments of reflective array waveguide, a reflective array waveguide includes clear waveguide panels for see-through viewing of an environment viewed through the reflective array waveguide. The reflective array waveguide also includes reflecting waveguide panels to reflect a virtual image that is generated to appear as part of the environment. Each of the reflecting waveguide panels have a partially reflective mirror coating deposited on opposing sides, and the reflecting waveguide panels are alternated in the reflective array waveguide with the clear waveguide panels. The alternating clear and reflecting waveguide panels are angled for augmented reality imaging of the reflected virtual image as part of the environment that is viewed through the reflective array waveguide.

Claims

1. A reflective array waveguide, comprising:

clear waveguide panels configured for see-through viewing of an environment viewed through the reflective array waveguide; and

reflecting waveguide panels configured to reflect a virtual image that is generated to appear as part of the environment, each of the reflecting waveguide panels having a partially reflective mirror coating deposited on opposing sides of the reflecting waveguide panels, the reflecting waveguide panels alternated in the reflective array waveguide with the clear waveguide panels, and both the clear and reflecting waveguide panels extending across the reflective array waveguide.

2. A reflective array waveguide as recited in claim 1, wherein the alternating clear and reflecting waveguide panels are angled for augmented reality imaging of the reflected virtual image as part of the environment that is viewed through the reflective array waveguide.

3. A reflective array waveguide as recited in claim 1, wherein the partially reflective mirror coating is a metal oxide coating deposited on the opposing sides of a reflecting waveguide panel to balance tensile forces that would otherwise warp the reflecting waveguide panel.

4. A reflective array waveguide as recited in claim 1, wherein each reflecting waveguide panel is bonded on each side to a clear waveguide panel, and the clear waveguide panels are bonded to the reflecting waveguide panels to form an alternating sequence of the clear and reflecting waveguide panels in the reflective array waveguide.

5. A reflective array waveguide as recited in claim 1, wherein the reflecting waveguide panels are each formed from a glass panel with the partially reflective mirror coating deposited on both sides of the glass panel.

6. A reflective array waveguide as recited in claim 5, wherein the clear waveguide panels are each formed as a glass panel positioned between two of the reflecting waveguide panels.

7. A reflective array waveguide as recited in claim 5, wherein the clear waveguide panels are each formed between the reflecting waveguide panels in a plastic injection mold.

8. A method, comprising:

depositing a partially reflective mirror coating on opposing sides of reflecting waveguide panels of a reflective array waveguide;

alternating the reflecting waveguide panels in the reflective array waveguide with clear waveguide panels; and

bonding each reflecting waveguide panel on each side to a clear waveguide panel, the clear waveguide panels being bonded to the reflecting waveguide panels to form an alternating sequence of the clear and reflecting waveguide panels in the reflective array waveguide, and both the clear and reflecting waveguide panels extending across the reflective array waveguide.

9. A method as recited in claim 8, further comprising angling the alternating clear and reflecting waveguide panels for augmented reality imaging of a reflected virtual image as part of an environment that is viewed through the reflective array waveguide.

10. A method as recited in claim 8, wherein the partially reflective mirror coating is a metal oxide coating deposited on opposite sides of a reflecting waveguide panel to balance tensile forces that would otherwise warp the reflecting waveguide panel.

11. A method as recited in claim 8, further comprising forming each of the reflecting waveguide panels from a glass panel with the partially reflective mirror coating deposited on the opposing sides of the glass panel.

12. A method as recited in claim 11, further comprising forming each of the clear waveguide panels as a glass panel positioned between two of the reflecting waveguide panels.

13. A method as recited in claim 11, further comprising forming each of the clear waveguide panels in a plastic injection mold as a clear plastic panel between two of the reflecting waveguide panels.

14. A wearable display device, comprising:

a left display lens system configured to form an augmented reality image for viewing, the augmented reality image including a virtual image displayed to appear as part of a viewed environment;

a right display lens system configured to form the augmented reality image for viewing;

each of the left and right display lens systems including a reflective array waveguide formed from clear waveguide panels and reflecting waveguide panels;

the clear waveguide panels configured for see-through viewing of the environment as viewed through the reflective array waveguide; and

the reflecting waveguide panels configured to reflect the virtual image that is generated to appear as part of the environment, each of the reflecting waveguide panels having a partially reflective mirror coating deposited on opposing sides of the reflecting waveguide panels, the reflecting waveguide panels alternated in the reflective array waveguide with the clear waveguide panels, and both the clear and reflecting waveguide panels extending across the reflective array waveguide.

15. A wearable display device as recited in claim 14, wherein the alternating clear and reflecting waveguide panels are angled for the augmented reality imaging of the reflected virtual image as part of the viewed environment.

16. A wearable display device as recited in claim 14, wherein the partially reflective mirror coating is a metal oxide coating deposited on the opposing sides of a reflecting waveguide panel to balance tensile forces that would otherwise warp the reflecting waveguide panel.

17. A wearable display device as recited in claim 14, wherein each reflecting waveguide panel is bonded on each side to a clear waveguide panel, and the clear waveguide panels are bonded to the reflecting waveguide panels to form an alternating sequence of the clear and reflecting waveguide panels in the reflective array waveguide.

18. A wearable display device as recited in claim 14, wherein the reflecting waveguide panels are each formed from a glass panel with the partially reflective mirror coating deposited on the opposing sides of the glass panel.

19. A wearable display device as recited in claim 18, wherein the clear waveguide panels are each formed as a glass panel positioned between two of the reflecting waveguide panels.

20. A wearable display device as recited in claim 18, wherein the clear waveguide panels are each formed between the reflecting waveguide panels in a plastic injection mold.