Abstract: LED lighting devices are provided that include two optical waveguides and at least one LED in an intermediate region between end faces of the optical waveguides so that radiation from the LED is coupled into the optical waveguides through the end faces. A de-coupler is on outer circumferential surface regions of each of the two separate optical waveguides. The de-coupler reflects the radiation guided in the optical waveguides so that the radiation passes through the optical waveguides and is coupled out of the optical waveguides laterally. The intermediate region has a length that is selected so that a brightness difference, measured perpendicular to an axis of the optical waveguides in the center of the intermediate region, at a distance of 10 mm perpendicular to the axis of the optical waveguides is at most 25% based on a maximum value of brightness along the axis of the optical waveguides.

Abstract: LED lighting devices are provided that include two optical waveguides and at least one LED in an intermediate region between end faces of the optical waveguides so that radiation from the LED is coupled into the optical waveguides through the end faces. A de-coupler is on outer circumferential surface regions of each of the two separate optical waveguides. The de-coupler reflects the radiation guided in the optical waveguides so that the radiation passes through the optical waveguides and is coupled out of the optical waveguides laterally. The intermediate region has a length that is selected so that a brightness difference, measured perpendicular to an axis of the optical waveguides in the center of the intermediate region, at a distance of 10 mm perpendicular to the axis of the optical waveguides is at most 25% based on a maximum value of brightness along the axis of the optical waveguides.

Abstract: LED lighting devices are provided that include two optical waveguides and at least one LED in an intermediate region between end faces of the optical waveguides so that radiation from the LED is coupled into the optical waveguides through the end faces. A de-coupler is on outer circumferential surface regions of each of the two separate optical waveguides. The de-coupler reflects the radiation guided in the optical waveguides so that the radiation passes through the optical waveguides and is coupled out of the optical waveguides laterally. The intermediate region has a length that is selected so that a brightness difference, measured perpendicular to an axis of the optical waveguides in the center of the intermediate region, at a distance of 10 mm perpendicular to the axis of the optical waveguides is at most 25% based on a maximum value of brightness along the axis of the optical waveguides.

Abstract: The invention includes optical elements for applications in regions with stringent fire safety regulations, whose color rendering index Ra is at least 97 at a thickness of 4 mm, and which are flame-retardant according to DIN 60332 and are mainly composed of a plastic having at least one structural element selected from the group consisting of sulphones, sulphides, ethers, esters, ketones and imides.

Abstract: LED lighting devices are provided that include two optical waveguides and at least one LED in an intermediate region between end faces of the optical waveguides so that radiation from the LED is coupled into the optical waveguides through the end faces. A de-coupler is on outer circumferential surface regions of each of the two separate optical waveguides. The de-coupler reflects the radiation guided in the optical waveguides so that the radiation passes through the optical waveguides and is coupled out of the optical waveguides laterally. The intermediate region has a length that is selected so that a brightness difference, measured perpendicular to an axis of the optical waveguides in the center of the intermediate region, at a distance of 10 mm perpendicular to the axis of the optical waveguides is at most 25% based on a maximum value of brightness along the axis of the optical waveguides.

Abstract: The invention includes optical elements for applications in regions with stringent fire safety regulations, whose colour rendering index Ra is at least 97 at a thickness of 4 mm, and which are flame-retardant according to DIN 60332 and are mainly composed of a plastic having at least one structural element selected from the group consisting of sulphones, sulphides, ethers, esters, ketones and imides.

Abstract: A fiber-optic device for functional and decorative interior lighting of aircraft cabins has at least one central light source and at least one fiber-optic waveguide system. The waveguides guide light from the light source to a lighting location. The waveguides are combined at a light-inlet side to form a light-receiving surface corresponding to the light source. The waveguides have at least one glass-fiber bundle with light outlet-side ends of glass fibers forming a light outlet surface preshaped as a point light, line of lights or flat light. Alternatively, a waveguide has at least one monofiber light-guiding rod with a diameter of 2-8 mm, preferably 3 mm, side light-emitting properties and a light outlet surface in the form of a line of lights or flat light. The device reduces the number of active power-consuming light sources in the cabin. One central light source supplies power to a plurality of locations and the light source can be outside the cabin.

Abstract: A fiber-optic device for lighting the interior space of a household or kitchen appliance includes optical fibers. The light entry ends of the optical fibers are assigned to a light source which is disposed away from the useful region of the interior space of the appliance. The optical fibers are grouped into flexible fiber bundles which extend with small bending radii from the light source to the inner walls of the appliance. Light exit ends of the fiber bundles form point light sources distributed on the inner walls of the appliance for an even illumination of the appliance interior space. The light source is advantageously disposed away from heated or refrigerated regions of the appliance. The fiber-optic device is advantageously mass-produced as a module which can be easily installed and serviced.

Abstract: A display device has a fiber optic projector for the luminous display of graphical representations. The projector has a fiber optic component with a projector input connected via optical conductors to a projector output. The projector input receives an input image that is transmitted to the projector output through optical conductors, for display as an output image with a display unit. Instead of sorting the optical conductor ends and combining them in a corresponding arrangement with identical assignment at the input and output sides, they are rather arbitrarily positioned such that the ends are irregular at the input as compared to the output. That is, the projector input and projector output are formed by combined optical conductor ends situated respectively opposite one another, that the optical conductor ends on the input and/or output sides are assigned to one another irregularly.

Abstract: In order to make traffic signs, information signs or advertising signs sufficiently visible in poor lighting conditions, a self-illuminated system with a fiber-optic lighting device is provided. The signs and billboards to be illuminated include one or more preferably plastic panels functioning as a display device arranged over each other, in which light is propagated from the fiber-optic device parallel to a display plane. Transparent information or signaling entities are provided on or in the panel or panels. In order to improve the quality of the illumination and to lower the manufacturing costs, the fiber-optic device is assembled in a modular manner from a plurality of standardized parts for standard fiber-optic systems according to display system requirements and includes multi-arm light guides, light outlet bodies for the multi-arm light guides acting as optical attachments for adjusting propagation angles for the light so that light intensities over the entire angular range are uniform.