IPC分类号：
F21V8/00 | G02B5/02 | A61N5/06
国民经济行业分类号：
C4350 | C3874 | C4090 | C3879
当前申请(专利权)人：
NEOLA MEDICAL AB
原始申请(专利权)人：
NEOLA MEDICAL AB
当前申请(专利权)人地址：
Scheelevägen 27,223 63 Lund,SE
发明人：
BERGSTEN, SARA | LEANDER, DENNIS
摘要：
A device and method for providing diffuse emission of light through a flat surface, which includes a flat light guide having two larger flat surfaces on opposite sides and side surfaces, wherein one of the two larger flat surfaces being a light emitting surface and the other surface being a back surface, a connector for coupling light into said flat light guide, and a diffusing layer arranged in contact with at least one of said two larger flat surfaces of said flat light guide.
技术问题语段：
The technical problem addressed in this patent is the need for a flat light diffuser designed for use in spectroscopy, especially in dermal applications, that can efficiently spread light and optimize the amount of light transmitted. Existing light diffusers are often bulky and not suitable for dermal use. The invention provides a solution by introducing a flat light guide with two larger flat surfaces on opposite sides and side surfaces, and a diffusing layer in contact with at least one of the flat surfaces. The diffusing layer may be printed or structured to diffuse light and provide a high transmission of light. The invention also includes a reflective material and a reflective layer to reflect light. The technical problem is solved by providing a flat light diffuser that is easy and cost-effective to manufacture.
技术功效语段：
The present patent is about a new light diffuser and a method for manufacturing it. The diffuser is designed to spread light over an area and optimize the amount of light transmitted. It is especially useful for dermal use in the field of spectroscopy. The diffuser is easy and cost-effective to manufacture. The technical effects of the patent are to provide a new light diffuser that can be used in the field of spectroscopy, especially for dermal use, and to provide a method for manufacturing it.
权利要求：
CLAIMS
1. A device for providing diffuse emission of light through a flat surface, the device comprising: a flat light guide having two larger flat surfaces on opposite sides and side surfaces, wherein one of the two larger flat surfaces being a light emitting surface and the other surface being a back surface; a connector for coupling light into said flat light guide; and a diffusing layer arranged in contact with at least one of said two larger flat surfaces of said flat light guide.
2. The device of claim 1, wherein a reflective material is arranged on all sides of the flat light guide apart from said light emitting surface. 3. The device of claim 2, wherein said reflective material reflects light either through specular reflection or through diffuse reflection.
4. The device of any of claims 2 or 3, wherein the diffusing layer is arranged between said back surface and said reflective material.
5. The device of any one of claims 1 to 4, wherein the diffusing layer has a refractive index higher than said flat light guide.
6. The device of any one of claims 1 to 5, wherein said diffusing layer is printed on one of said two larger flat surfaces of said flat light guide.
7. The device of any one of claims 1 to 6, wherein said diffusing layer is arranged as a pattern on one of said two larger flat surfaces of said flat light guide to provide a plurality of areas of diffuse reflection.
8. The device of claim 7, wherein said pattern is printed as a plurality of areas of various widths and space between.
9. The device of any one of claims 1 to 6, wherein said diffusing layer comprises structures, such as micro structures, to diffuse the light, or wherein the diffusing layer is a structural writing on at least one of said two larger surfaces of said flat light guide.
10. The device of any one of claims 7 or 8, wherein said diffusing layer is arranged as said pattern on said back surface of said flat light guide and said reflective layer is reflecting light of areas of said back surface not covered by said pattern.
11. The device of any one of claims 1 to 10, wherein said light emitting surface is covered by a first layer having a lower refractive index than said flat light guide.
12. The device of claim 11, wherein said layer covering said light emitting surface has a refractive index close to a material, such as human skin, to which light should be coupled.
13. The device of any one of claims 1 to 12, wherein said diffusing layer is arranged on said light emitting surface, or is arranged in said light guide, and wherein a second layer is arranged on said back surface and said side surfaces, said second layer has a lower refractive index than said flat light guide.
14. The device of any of claims 1 to 12, wherein said diffusing layer is arranged on said back surface and wherein a second layer is arranged on top of said diffusing layer and on said side surfaces has a lower refractive index than said flat light guide
15. The device of claim 14, wherein said diffusing layer is arranged on said back surface and said second
layer is arranged between said diffusing layer and said reflecting layer.
16. The device of any one of claims 1 to 15, wherein an initial area closest to said connector is not covered by said diffusing material.
17. A method of manufacturing a device for providing diffuse emission of light through a flat surface, comprising: providing a flat light guide having two larger flat surfaces on opposite sides and side surfaces, wherein one of the two larger flat surfaces being a light emitting surface and the other surface being a back surface; arranging a connector for coupling light into said flat light guide; and arranging a diffusing layer in contact with at least one of said two larger flat surfaces of said flat light guide.