Polyurethane Light Guides
First Claim
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1. A light guide formed from an unclad flexible polyurethane fibre, wherein said light guide produces significant side scattering over distances of up to several metres.
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Abstract
A light guide (1) formed from an unclad flexible polyurethane fibre produces significant side scattering (2) over distances of up to several metres. The polyurethane fibre is in the form of a solid fibre or a tube and may comprise light scattering particles. The polyurethane fibre may comprise a transparent flexible polyurethane UV resistant outer cladding. Embodiments include illuminated shoe laces, a power cord safety indicator, an illuminated dental suction tube and a dental curing tip.
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Citations
17 Claims
- 1. A light guide formed from an unclad flexible polyurethane fibre, wherein said light guide produces significant side scattering over distances of up to several metres.
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6. A safety indicator for a power cord comprising an unclad flexible polyurethane extruded tube and one or more light emitting diodes coupling light into said fibre.
- 7. An illuminated dental suction tube comprising an unclad polyurethane extruded tube and one or more light emitting diodes coupling light into said tube for the illumination of a patient'"'"'s mouth and for the extraction of fluids from the patient'"'"'s mouth through the tube.
- 9. A dental curing tip comprising an unclad polyurethane extruded solid fibre and one or more light sources coupling blue light into the fibre for curing fillings in teeth.
- 11. A light guide formed from a transparent flexible polyurethane inner fibre having a transparent flexible polyurethane outer cladding, wherein said inner fibre is susceptible to deterioration caused by ultra-violet (UV) radiation and said outer cladding is resistant to deterioration caused by ultra-violet (UV) radiation.
Specification