Compound curved stereoscopic eyewear

• US 20110188115A1
• Filed: 02/01/2011
• Published: 08/04/2011
• Est. Priority Date: 02/01/2010
• Status: Abandoned Application

• Current Assignee: RealD Incorporated
• Original Assignee: RealD Incorporated
• Inventors: Sharp, Gary D., Coleman, David A.
• Application Number:
  US13/019,275
• Publication Number:
  US 20110188115A1
• Time in Patent Office: Days
• US Class Current: 359/465
• CPC Class Codes: B29D 11/00644 polarizing
• CPC Class Codes: B29D 11/0073 Optical laminates
• CPC Class Codes: G02B 30/25 using polarisation techniques
• CPC Class Codes: G02B 5/30 Polarising elements light-modulating devices with active elements G02F1/00
• CPC Class Codes: G02B 5/3033 in the form of a thin sheet or foil, e.g. Polaroid
• CPC Class Codes: G02B 5/3083 Birefringent or phase retarding elements G02B5/3008, G02B5/3016 take precedence; systems for polarisation control G02B27/286; manufacturing phase modulating patterns by lithographic processes G03F7/001
• CPC Class Codes: H04N 2213/008 Aspects relating to glasses for viewing stereoscopic images

Abstract

Stereoscopic eyewear with compound curvature may be employed to view three dimensional content. The manufacture of such eyewear may be achieved by thermoforming a first material and by thermoforming a second material. The first and second materials may be in roll stock form prior to thermoforming, and the first layer may be polarizer material, while the second layer may be retarder material. Each of the first and second materials may be thermoformed by employing optimized thermoforming conditions for each of the two materials. Additionally, the two thermoforming lines may be timed so that the curved shapes of the first material in roll stock form may be substantially synchronized with the curved shapes of the second material in roll stock form, which may allow the curved shapes of each of the first and second materials in roll stock form may be joined together.

Claims

1. A method for providing a lens with compound curvature, the method comprising:

thermoforming a first layer with first predetermined thermoforming conditions;

thermoforming a second layer with second predetermined thermoforming conditions; and

coupling the first and second thermoformed layers.

2. The method of claim 1, wherein the first layer comprises linear polarizer material, and wherein the second layer comprises retarder material.

3. The method of claim 2, wherein at least one of the linear polarizer material and the retarder material is in roll stock form prior to thermoforming.

4. The method of claim 1, wherein thermoforming the first layer and second layer further comprises forming the first layer and second layer into substantially curved surfaces.

5. The method of claim 1, wherein assembling the thermoformed first layer and the thermoformed second material further comprises coupling the two materials together with an adhesive.

6. The method of claim 5, wherein coupling the two layers together further comprises curing the adhesive with an ultraviolet light source.

7. The method of claim 1, wherein thermoforming the first and second layers is performed substantially simultaneously.

8. The method of claim 2, wherein forming the first layer and the second layer into a series of curved surfaces further comprises substantially matching the radius of curvature of an approximately convex surfaces of the first layer to the radius of curvature of an approximately concave surfaces of the second layer.

9. The method of claim 8, further comprising substantially synchronizing the processing of the first and second layers so that the approximately convex surfaces of the first layer may be brought into contact with the approximately concave surfaces of the second layer.

10. The method of claim 1, wherein assembling the first layer and the second layer induces minimal differential stress between the first and second layers.

11. The method of claim 1, further comprising thermoforming a third layer.

12. The method of claim 2, wherein the retarder material is a cyclo olefin copolymer material.

13. The method of claim 2, wherein the linear polarizer material is a polyvinyl alcohol material.

14. A method for providing a lens with compound curvature, the method comprising:

thermoforming a polarizer layer;

thermoforming a retarder layer; and

assembling the thermoformed polarizer layer and the thermoformed retarder layer while substantially maintaining an approximate retardation value, wherein a first side of the thermoformed polarizer layer is in contact with a first side of the thermoformed retarder layer.

15. The method of claim 14, wherein the polarizer layer is thermoformed under conditions optimized for thermoforming the polarizer layer, and wherein the retarder layer is thermoformed under conditions optimized for thermoforming the retarder layer.

16. The method of claim 14, wherein assembling the thermoformed polarizer layer and the thermoformed retarder layer further comprises laminating the polarizer and the retarder together.

17. The method of claim 16, wherein laminating the polarizer and the retarder together further comprises depositing an adhesive onto at least a first surface of the thermoformed polarizer layer.

18. The method of claim 14, wherein thermoforming the polarizer layer and thermoforming the retarder layer are performed substantially simultaneously.

19. The method of claim 18, further comprises substantially synchronizing the thermoforming of the polarizer and the retarder so that the approximately convex surfaces of the polarizer may be brought into contact with the approximately concave surfaces of the retarder.

20. A lens with compound curvature, comprising:

a first thermoformed layer comprising linear polarizer material, the first thermoformed layer formed using first predetermined thermoforming conditions; and

a second thermoformed layer comprising retarder material, the second thermoformed layer formed using second predetermined thermoforming conditions,

wherein the first and second thermoformed layers are coupled with an adhesive.

21. The lens with compound curvature of claim 20, wherein the optically polarized material has a plurality of substantially curved surfaces.

22. The lens with compound curvature of claim 21, wherein the plurality of substantially curved surfaces of the optically polarized material includes a substantially matched radius of curvature of a plurality of approximately convex surfaces of the first thermoformed layer with the radius of curvature of a plurality of approximately concave surfaces of the second thermoformed layer.

23. The lens with compound curvature of claim 20, wherein the first thermoformed layer and the second thermoformed layer is thermoformed substantially simultaneously.

24. The lens with compound curvature of claim 20, wherein the coupled first thermoformed layer and the second thermoformed layer have a minimal differential stress between the first and second thermoformed layers.

25. The lens with compound curvature of claim 20, further comprising a third thermoformed layer.

26. The lens with compound curvature of claim 20, wherein the linear polarizer material comprises polyvinyl alcohol.

27. The lens with compound curvature of claim 20, wherein the retarder comprises a cyclo olefin copolymer.

28. The lens with compound curvature of claim 20, wherein the linear polarizer material has an axis of polarization, wherein the retarder has an axis of retardation, and wherein the axis of polarization is oriented in a range between 43 and 47 degrees to the axis of retardation in a central area of the lens.

29. The lens with compound curvature of claim 20, wherein the first predetermined thermoforming conditions are different from the second predetermined thermoforming conditions.

30. Stereoscopic eyewear for receiving orthogonal circularly polarized light, comprising:

a first lens comprising;

a first thermoformed layer comprising linear polarizer material, the first thermoformed layer formed using first predetermined thermoforming conditions,

a second thermoformed layer comprising retarder material, the second thermoformed layer formed using second predetermined thermoforming conditions,

wherein the first thermoformed layer is coupled to the second thermoformed layer,

wherein the linear polarizer material has an axis of polarization, wherein the retarder has an axis of retardation, and wherein the axis of polarization is fixedly maintained in a range between +43 and +47 degrees to the axis of retardation within a central area of the first lens;

a second lens comprising;

a third thermoformed layer comprising linear polarizer material, the third thermoformed layer formed using the first predetermined thermoforming conditions,

a fourth thermoformed layer comprising retarder material, the fourth thermoformed layer formed using the second predetermined thermoforming conditions,

wherein the third thermoformed layer is coupled to the fourth thermoformed layer,

wherein the linear polarizer material has an axis of polarization, wherein the retarder has an axis of retardation, and wherein the axis of polarization is fixedly maintained in a range between −

43 and −

47 degrees to the axis of retardation within a central area of the second lens; and

a frame to hold the first and second lenses.