Fluid-based light guiding structure and fabrication thereof

• US 10,025,028 B2
• Filed: 12/21/2016
• Issued: 07/17/2018
• Est. Priority Date: 09/13/2014
• Status: Active Grant

• Current Assignee: Sensor Electronic Technology Incorporated (Seoul Semiconductor Co., Ltd.)
• Original Assignee: Sensor Electronic Technology Incorporated (Seoul Semiconductor Co., Ltd.)
• Inventors: Dobrinsky, Alexander, Shur, Michael, Gaska, Remigijus
• Primary Examiner(s): Wong, Tina
• Application Number:
  US15/387,592
• Publication Number:
  US 20170097466A1
• Time in Patent Office: 573 Days
• Field of Search: None
• CPC Class Codes: G02B 1/045 Light guides
• CPC Class Codes: G02B 2006/0325 Fluid core or cladding
• CPC Class Codes: G02B 6/00 Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
• CPC Class Codes: G02B 6/0003 the light guides being doped with fluorescent agents
• CPC Class Codes: G02B 6/0065 Manufacturing aspects; Material aspects
• CPC Class Codes: G02B 6/10 of the optical waveguide type G02B6/02, G02B6/24 take precedence; devices or arrangements for the control of light by electric, magnetic, electro-magnetic or acoustic means G02F1/00; transferring the modulation of modulated light G02F2/00; optical logic elements G02F3/00; optical analogue/digital converters G02F7/00
• CPC Class Codes: G02B 6/102 for infrared and ultraviolet radiation
• CPC Class Codes: G02B 6/1221 made from organic materials
• CPC Class Codes: G02B 6/34 utilising prism or grating G02B6/293 takes precedence

Abstract

A solution for fabricating a structure including a light guiding structure is provided. The light guiding structure can be formed of a fluoropolymer-based material and include one or more regions, each of which is filled with a fluid transparent to radiation having a target wavelength, such as ultraviolet radiation. The region(s) can be created using a filler material, which is at least substantially enclosed by the fluoropolymer-based material and subsequently removed from each region. The structure can further include at least one optical element integrated into the light guiding structure.

Claims

1. A light guiding structure, comprising:

a plurality of ultraviolet transparent fluid layers;

a plurality of fluoropolymer layers, each fluoropolymer layer disposed between a pair of ultraviolet transparent fluid layers; and

a encapsulant that encapsulates the plurality of ultraviolet transparent fluid layers and the plurality of fluoropolymer layers.

2. The light guiding structure of claim 1, wherein a first set of the ultraviolet transparent fluid layers and a first set of the fluoropolymer layers form a first light guiding structure sub-region and a second set of the ultraviolet transparent fluid layers and a second set of the fluoropolymer layers form a second light guiding structure sub-region.

3. The light guiding structure of claim 2, further comprising a central ultraviolet transparent fluid region disposed between the first light guiding structure sub-region and the second light guiding structure sub-region.

4. The light guiding structure of claim 3, wherein one or more of the ultraviolet transparent fluid layers in the first light guiding structure sub-region and the second light guiding structure sub-region have a low refractive index.

5. The light guiding structure of claim 3, wherein the first light guiding structure sub-region, the second light guiding structure sub-region and the central ultraviolet transparent fluid region disposed there between form a Bragg reflector.

6. The light guiding structure of claim 5, wherein the first light guiding structure sub-region and the second light guiding structure sub-region each includes a thickness that is commensurate with a wavelength of radiation that is configured to propagate through the central ultraviolet transparent fluid region.

7. The light guiding structure of claim 3, wherein one of the first light guiding structure sub-region or the second light guiding structure sub-region includes at least one layer of a material having an index of refraction that is different than an index of refraction of the central ultraviolet transparent fluid region.

8. The light guiding structure of claim 3, wherein the plurality of ultraviolet transparent fluid layers and the central ultraviolet transparent fluid region include one of:

a gas, water or air.

9. The light guiding structure of claim 2, wherein one of the first light guiding structure sub-region or the second light guiding structure sub-region includes at least one layer of a material having fluorescent properties.

10. The light guiding structure of claim 1, wherein at least one of the ultraviolet transparent fluid layers includes a set of pillars, each pillar extending vertically through an ultraviolet transparent fluid layer to contact the pair of fluoropolymer layers that the ultraviolet transparent fluid layer is disposed there between, the set of pillars separating the ultraviolet transparent fluid layer into multiple regions each having an ultraviolet transparent fluid.

11. The light guiding structure of claim 1, wherein at least one of the fluoropolymer layers includes a set of diffusive elements, each diffusive element configured to propagate light from a light source in a diffusive manner.

12. The light guiding structure of claim 1, wherein an outer surface of the encapsulant includes a set of prisms.

13. A system, comprising:

at least one light source; and

a multi-layered light guiding structure coupled to the at least one light source, including;

a plurality of ultraviolet transparent fluid layers; and

a plurality of fluoropolymer layers, each fluoropolymer layer disposed between a pair of ultraviolet transparent fluid layers.

14. The system of claim 13, wherein each of the ultraviolet transparent fluid layers includes a set of pillars, each pillar extending vertically through the ultraviolet transparent fluid layer to contact the pair of fluoropolymer layers that the ultraviolet transparent fluid layer is disposed there between, the set of pillars separating the ultraviolet transparent fluid layer into multiple regions each having an ultraviolet transparent fluid.

15. The system of claim 14, wherein each of the multiple regions includes a pair of structural support members that crisscross with each other to contact a pair of pillars that defines the region, the multiple regions of crisscrossing structural support members placed between the pillars in the ultraviolet transparent fluid layer form a lattice-type truss.

16. The system of claim 13, wherein the plurality of fluoropolymer layers includes a plurality of horizontally extending fluoropolymer planes and a plurality of vertically extending fluoropolymer planes, each of the horizontally extending fluoropolymer planes intersecting with the plurality of vertically extending fluoropolymer planes.

17. The system of claim 13, wherein the plurality of ultraviolet transparent fluid layers includes one of:

a gas, water or air.

18. The system of claim 13, wherein the plurality of fluoropolymer layers includes a fluoropolymer selected from the group consisting of EFEP, ETFE, and PTFE.

19. A system, comprising:

a plurality of light sources; and

a multi-layered light guiding structure coupled to the plurality of light sources, including;

a plurality of ultraviolet transparent fluid layers, each including one of;

a gas, water or air; and

a plurality of fluoropolymer layers, each fluoropolymer layer disposed between a pair of ultraviolet transparent fluid layers; and

a substrate that supports the plurality of light sources and the multi-layered light guiding structure, wherein the plurality of light sources are disposed across the substrate, each light source configured to direct light to at least one object placed on the multi-layered light guiding structure.

20. The system of claim 19, wherein the plurality of fluoropolymer layers includes a plurality of horizontally extending fluoropolymer planes and a plurality of vertically extending fluoropolymer planes, each of the horizontally extending planes intersecting with the plurality of vertically extending fluoropolymer planes.