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Title:
OPTICAL DEVICE FOR LIGHT COLLECTION
Document Type and Number:
WIPO Patent Application WO/2015/028991
Kind Code:
A4
Abstract:
The present invention relates to an optical system, wherein the optical system comprises a transparent optic defining an optical volume, the transparent optic comprising a first main face adapted to admit light into the optical volume and a first turning optic for turning the light admitted inside the optical volume such that the light is internally reflected within the optical volume.

Inventors:
VENKATESAN, Varun Akur (286 12th Main, 5th Cross Sector 5, HSR Layout, Bangalore 2, 56010, IN)
Application Number:
IB2014/064174
Publication Date:
May 07, 2015
Filing Date:
September 01, 2014
Export Citation:
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Assignee:
VENKATESAN, Varun Akur (286 12th Main, 5th Cross Sector 5, HSR Layout, Bangalore 2, 56010, IN)
International Classes:
G02B19/00; F21V8/00; H01L31/054
Download PDF:
Claims:
AMENDED CLAIMS

received by the International Bureau on 20.03.2015

Patent Claims

1. An optical system, comprising: a transparent optic defining an optical volume, the transparent optic comprising a first main face adapted to admit light into the optical volume and a second main face opposite to the first main face, the second main face being parallel to the first main face; and a first turning optic for turning the light admitted inside the optical volume such that the light is internally reflected within the optical volume, wherein the light interacts with the first turning optic a plurality of times, the first turning optic is adapted to provide an added turn angle to each successive reflection of the light.

2. The optical system according to claim 1 wherein the first turning optic is configured to impart a cumulatively larger turn angle as the interaction of the incident light with the first turning optic increases.

3. The optical system according to claim 1, wherein the first turning optic is arranged on a portion of one of the first main face and the second main face.

4. The optical system according to claim 1, wherein the transparent optic further comprises one or more side faces configured to direct light outside the optical volume.

5. The optical system according to claim 1, wherein the first turning optic is configured to turn the light to a direction different from the geometric normal of the first main face.

6. The optical system according to claim 1, wherein the first turning optic is configured to turn the light to a direction different from the geometric normal of the second main face.

7. The optical system according to claim 1, wherein the first turning optic comprises an array of geometrical structures for turning the light.

8. The optical system according to claim 6, wherein the geometrical structures are adapted to selectively alter the direction of reflection.

12. The optical system according to claim 7, wherein the array of geometrical structures are prisms or trapezoidal in shape.

13. The optical system according to claim 1, wherein the first turning optic is configured to simultaneously direct portions of the incident light in more than one directions.

14. The optical system according to claim 1, wherein the first turning optic is made of a material of laterally varying refractive index.

15. The optical system according to claim 1, wherein the first turning optic is made of one or more layers of axially varying refractive index.

16. The optical system according to claim 1, wherein the first turning optic is curved in one or more directions.

17. The optical system according to any of the preceding claims, wherein the first turning optic is arranged on a portion of one of the first main face and the second main face.

18. The optical system according to claim 17, wherein the first turning optic is a made of an elastic material.

19. The optical system according to claim 17, wherein the first turning optic is made of a flexible material.

20. The optical system according to claim 17, wherein the first turning optic is a film.

21. The optical system according to any of the claims 2 to 20, wherein the first turning optic is a layer formed on a portion of one of the first main face and the second main face.

23. The optical system according to any of the claims 2 to 21, wherein the second main face is at an angle to the first main face.

24. The optical system according to any of claims 1 to 23, wherein the optical volume is formed of a solid.

25. The optical system according to any of the claims 1 to 23, wherein the optical volume is formed of a fluid.

26. The optical system according to any of the claims 1 to 23, wherein at least a portion of the optical volume is formed of vacuum.

27. The optical system according to claims 1 to 23, wherein the transparent optic is flexible.

28. The optical system according to claims 1 to 23, wherein the transparent optic is stretchable.

29. The optical system according to claims 2 to 23, wherein at least one of the first main face, the second main face and the first turning optic is coated with an antireflection coating.

30. The optical system according to any of the preceding claims, further comprising a secondary turning optic for directing the light at a desired angle onto the first main face, the secondary turning optic coupled to the first main face via a layer having a refractive index lower than the optical volume.

31. The optical system according to any of the preceding claims, further comprising: an additional transparent optic defining an additional optical volume; and a coupler adapted to receive the light emerging from the optical volume of the transparent optic after internal reflection and direct the light onto the additional transparent optic; wherein the additional transparent optic is adapted to admit the light directed by the coupler.

32. The optical system according to any of the preceding claims, wherein a wavelength selective filter is placed between the first turning optic and the optical volume.

32. The optical system according to any of the preceding claims, further comprising a coupling device to direct light onto a portion of the first main face or the second main face.

34. The optical system according to any of the preceding claims, wherein a first portion of the incident light is admitted inside the optical volume and a second portion of the incident light is transmitted.

35. The optical system according to any of the claims 2 to 33, wherein the first turning optic is removably attached onto one of the first face and the second face.

36. The optical system according to claim 6, wherein the geometrical structures are adapted to reflect a first portion of the incident light and transmit a second portion of the incident light.

37. The optical system according to any of the preceding claims, wherein the transparent optic comprises a propagation area comprising a triangular geometrical profile, wherein the light propagates through internal reflections between the first main face and the second main face in the propagation area.

38. The optical system according to any of the preceding claims, further comprising a plurality of transparent optics are arranged one above another, wherein at least one said transparent optic is configured to direct a portion of the light admitted from the scene to at least one said another transparent optic.

39. The optical system according to any of the preceding claims, wherein the transparent optic is configured to admit light from a plurality of different viewpoints and direct the light at different positions of the first turning optic for light corresponding to different viewpoints.

40. The optical system according to any of the preceding claims, wherein the transparent optic comprises a cylindrical geometrical structure.

41. The optical system according to claim 12 wherein the prism further comprises of: a base face, a leading edge face and a trailing edge face; first angle of the prism defined as the angle between the leading edge face and the base face; and the second angle of the prism defined as the angle between the trailing edge face and the base face.

42. The optical system according to claim 41 wherein the value of the first angle of prism is less than half the value of the critical angle.

43. The optical system according to claim 41 wherein the value of second angle of the prism is less than (90-critical angle).

44. The optical system according to claim 41 wherein the value of second angle of the prism is less than (90-critical angle - 2* the first angle of prism* number of reflections).

45. The optical system according to claim 31 wherein the coupler turns the rays of light such that the number of interactions of rays of light in the second optical volume is increased.

46. The optical system according to claim 31 wherein the coupler is a reflector.

47. The optical system according to claim 1, further comprising an offshoot area adapted to admit additional rays of light into the optical volume for capturing an additional dimension of an object; the offshoot area enabled with a turning optic for redirecting the additional rays of light to reach the optical volume in a predetermined manner.

48. The optical system according to claim 3 wherein a portion of the first or the second main face is coated with bragg gratings, photonic crystals or perfect mirrors.

49. The optical system according to claim 1 wherein the light incident distal from the point of exit, exits at a larger angle than light incident proximal from the point of exit.