DEVICE AND METHOD TO REALIZE A LIGHT PROCESSOR

• US 20080266645A1
• Filed: 11/07/2007
• Published: 10/30/2008
• Est. Priority Date: 11/07/2006
• Status: Active Grant

• Current Assignee: Agency For Science Technology and Research
• Original Assignee: Agency For Science Technology and Research
• Inventors: Dharmatilleke, Saman
• Granted Patent: US 7,764,436 B2
• Time in Patent Office: Days
• US Class Current: 359/291
• CPC Class Codes: G02B 26/004 based on a displacement or a deformation of a fluid

Abstract

A device for light processing includes a first housing having a reflective bottom surface and walls defining a first cavity. A first fluid or gel has a meniscus disposed within the first cavity. A control means is coupled with the first fluid or gel for adjusting the curvature of the meniscus. The bottom surface is configured to reflect an incident light beam through the first fluid or gel and toward the meniscus.

Claims

1. A device for light processing comprising:

a first housing having a reflective bottom surface and side walls defining a first cavity;

a first fluid or gel having a meniscus disposed within the first cavity; and

a first control means coupled with the first fluid or gel for adjusting the curvature of the meniscus;

wherein the bottom surface is configured to reflect an incident light beam through the first fluid or gel and toward the meniscus.

2. The device of claim 1 wherein adjusting the curvature to above a critical curvature causes the meniscus of the first fluid or gel to deflect the reflected incident light to the bottom surface or the side walls of the cavity.

3. The device of claim 1 wherein adjusting the curvature to below a critical curvature allows the reflected incident light to refract onto a surface outside of the housing.

4. The device of claim 1 wherein the reflected incident light refracts onto a surface outside of the housing when the device is in the “

on”

position.

5. The device of claim 1 wherein the reflected incident light deflects to the bottom surface or the side walls of the cavity when the device is in the “

off”

position.

6. The device of claim 1 wherein the control means includes an actuator.

7. The device of claim 1 wherein the control means includes an electro-wetting means.

8. The device of claim 1 wherein the control means includes a piezoelectric actuator.

9. The device of claim 1 wherein the housing includes a top surface and wherein the top surface has a non-reflective coating.

10. The device of claim 1 wherein the housing includes a top surface and wherein the top surface does not have a non-reflective coating.

11. The device of claim 1 further comprising a hydrophobic material covering a surface of the walls above the meniscus of the first fluid or gel.

12. The device of claim 11 wherein the hydrophobic material includes a material selected from the group consisting of Teflon, CYTOP, zirconium oxynitride, polymers, ceramics, alloys or any other hydrophobic materials.

13. The device of claim 1 further comprising:

a second housing having a reflective bottom surface and side walls defining a second cavity;

a second fluid or gel having a meniscus disposed within the second cavity; and

a second control means coupled with the second fluid or gel for adjusting the curvature of the meniscus;

wherein the bottom surface is configured to reflect the incident light beam through the second fluid or gel and toward the meniscus.

14. The device of claim 1 wherein the cavity is coupled with a channel that is further coupled with a fluid or gel reservoir.

15. The device of claim 1 wherein the fluid or gel includes a liquid.

16. The device of claim 1 wherein the fluid or gel includes a polymer.

17. The device of claim 1, wherein the light processor is a digital light processor.

18. The device of claim 1, wherein the light processor is an analog light processor.

19. A device comprising:

a plurality of cavities, each having a reflective bottom surface;

a fluid or gel having a meniscus disposed within each cavity; and

a control means coupled with the fluid or gel for adjusting the curvature of the meniscus disposed within each cavity;

wherein the bottom surface is configured to reflect an incident light beam through the fluid or gel and onto an outside surface.

20. The device of claim 19 wherein the plurality of cavities is provided by porous silicon.

21. The device of claim 20 wherein each cavity has a diameter of about 5 μ

m.

22. The device of claim 19 wherein the plurality of cavities is coupled with a multi-channel structure that is further coupled with a fluid or gel reservoir.

23. The device of claim 19 wherein each cavity represents a pixel in a light processor.

24. The device of claim 19 wherein the outside surface is a display screen.

25. The device of claim 19 further coupled with an electronic feedback system that allows real-time focusing.

26. A method of manipulating light comprising:

providing a fluid or gel within a housing that includes a bottom surface and a cavity, wherein the fluid or gel forms a meniscus disposed within the cavity;

focusing an incident light beam to the bottom surface of the cavity, wherein the light beam reflects from the bottom surface to the meniscus; and

adjusting the curvature of the meniscus so that the light refracts out of the cavity or reflects into the cavity.

27. The method of claim 26 wherein adjusting the curvature of the meniscus so that light refracting out of the cavity occurs when the curvature remains below a critical curvature.

28. The method of claim 26 wherein adjusting the curvature of the meniscus so that light reflecting into the cavity occurs when the curvature exceeds a critical curvature, wherein the incident light beam forms an incident angle that is larger than a critical angle for total internal reflection.

29. The method of claim 26 wherein adjusting the curvature of the meniscus occurs by changing the pressure applied on the fluid or gel.

30. The method of claim 26 wherein adjusting the curvature of the meniscus occurs by electro-wetting.

31. A method of manipulating light in a light processor without movable mirrors comprising:

providing a fluid or gel within a housing that includes a reflective bottom surface and a cavity, wherein the fluid or gel forms a meniscus disposed within the cavity;

focusing an incident light beam to the bottom surface of the cavity;

adjusting the curvature of the meniscus to manipulate the reflection of incident light.

32. The method of claim 31 wherein adjusting includes adjusting the curvature of the meniscus to remain below a critical curvature so that the light beam refracts to outside the cavity.

33. The method of claim 31 wherein adjusting includes adjusting the curvature of the meniscus to exceed a critical curvature so that the light beam deflects back into the cavity.

34. The method of claim 31 wherein adjusting includes adjusting the curvature of the meniscus to remain below a critical curvature so that a pixel of light turns on.

35. The method of claim 31 wherein adjusting includes adjusting the curvature of the meniscus to exceed a critical curvature so that a pixel of light turns off.

36. A device for light processing comprising:

a first housing having a reflective bottom surface and side walls defining a first cavity;

a first electro-active or conductive material having a meniscus disposed within the first cavity; and

a first control means coupled with the first electro-active or conductive material for adjusting the curvature of the meniscus;

wherein the bottom surface is configured to reflect an incident light beam through the first electro-active or conductive material and toward the meniscus.

37. The device of claim 36 wherein the side walls are non reflective.

38. The device of claim 36 wherein the electro-active or conductive material includes a fluid.

39. The device of claim 36 wherein the electro-active or conductive material includes a gel.

40. The device of claim 36 wherein adjusting the curvature to above a critical curvature causes the meniscus of the first electro-active or conductive material to deflect the reflected incident light to the bottom surface or the side walls of the cavity.

41. The device of claim 36 wherein adjusting the curvature to below a critical curvature allows the reflected incident light to refract onto a surface outside of the housing.

42. The device of claim 36 wherein the control means is a power source coupled with the electro-active or conductive material to apply a voltage on the electro-active or conductive material.

43. The device of claim 36 further comprising a hydrophobic dielectric material covering the walls of the cavity.

44. The device of claim 43, wherein the curvature of the meniscus is adjusted by changing a contact angle formed by the electro-active or conductive material with the dielectric material on the walls of the cavity.

45. A light processor which uses total internal reflection of light to control transmission, refraction or reflection of light.

46. A light processor which uses total internal reflection and/or refraction and/or reflection of light to control the transmission, refraction or reflection of light in a device.