Abstract: An illumination apparatus having a radiation source and a light guide coupled thereto. The temperature of the light guide is monitored along its complete length. If a threshold temperature is exceeded, a switching mechanism will be triggered. The switching mechanism switches off the radiation source or triggers a warning signal.

Abstract: The appliance according to the invention for dermatological or cosmetic treatment of a patient comprises a base body (19; 6c19; 59), which has a radiation source (11; 6c11; 21; 41; 61) for emitting light in a wavelength range between 350 nm and 1000 nm. An intermediate piece (15; 6c15, 6c22, 6c23, 6c25; 25; 35; 45; 55; 550, 551; 650) sitting on the base body (19; 6c19; 59) conveys the light from the radiation source (11; 6c11; 21; 41; 61) in the direction of a body region (214) of the patient to be treated. An attachment element (15; 6c15, 6c22, 6c23, 6c25; 25; 35; 45; 55; 550, 551; 650) secured detachably on the light output end of the intermediate piece (15; 6c15, 6c22, 6c23, 6c25; 25; 35; 45; 55; 550, 551; 650) is brought into direct contact with the body region (214) to be treated, in order thereby to introduce a dermatologically or cosmetically active substance (213), during irradiation with the emitted light, into the body region (214) to be treated.

Abstract: An illumination apparatus includes an irradiation source and a liquid light guide coupled thereto. The liquid light guide has the form of a goose neck. A liquid filled light guide tube of the liquid light guide is supported in a position retaining tube and at least one end of the light guiding tube, preferably the light input end, is supported rotatably in the position retaining tube.

Abstract: An apparatus for optical examination of documents. The apparatus includes a light source, a plurality of panels which are exchangeable with each other, a viewing unit having a window formed by at least one of the plurality of exchangeable panels through which window light emitted from the light source exits for examination of documents by an observer. Further included is a coupling unit configured to supply the light emitted from the light source into the viewing unit. The light source and the viewing unit are coupled together by a light guide and the light guide is adapted to supply the light from the light source to the coupling unit. At least one of the plurality of exchangeable panels is a fluorescent panel including a fluorescent substance. The fluorescent panel is fluorescent in the yellow-red-infrared wavelength range when being illuminated with light in the ultraviolet-blue-green wavelength range.

Abstract: The invention relates to a dermatological treatment device suitable primarily for treating nail fungus, in particular toenail fungus. The use of a photochemically active substance allows effective control of the fungus by irradiating with light at a wavelength that is relatively harmless to health. Potential technical implementations are possible for setting up the irradiation device, utilizing either a gas discharge lamp or LEDs as the light source. A shoe-shaped optical shielding housing is preferably used, being transparent in the long-wavelength portion of the visible spectrum, and absorptive in the short-wavelength, therapeutic range of the spectrum.

Abstract: The invention improves the optical transmission of a light guide assembly in an optical illumination apparatus achieved by one or more insulation layers which sheath a rigid or flexible light guide rod of the light guide assembly and/or the coupling of light emitted from a radiation source into the light input surface of the light guide rod is improved by an adapter element. Important for the improved transmission in the light guide rod is a highly viscous liquid layer which is in direct contact with the lateral surface of the light guide rod and which includes a perfluoropolyether, particularly Krytox®, Fombline® or Galden®, e.g. Krytox® 16350.

Abstract: An illumination apparatus having a radiation source and a light guide coupled thereto. The temperature of the light guide is monitored along its complete length. If a threshold temperature is exceeded, a switching mechanism will be triggered. The switching mechanism switches off the radiation source or triggers a warning signal.

Abstract: A liquid light guide 11, 21, 31 which is connected to an irradiation source 23 including a reflector lamp has an irradiation image 12 with a relatively inhomogeneous intensity distribution. The present invention relates to a simple mechanical clamping device to be clamped from outside onto the liquid light guide 11, 21, 31 for impressing a sharp U- or S-shaped curvature thereon. Due to the curvature the intensity distribution of the irradiation image 12 is homogenized at an acceptably low transmission loss of only a few percent.

Abstract: An illumination apparatus comprises an irradiation source 11 and a liquid light guide 10 coupled thereto. The liquid light guide has the form of a goose neck. A liquid filled light guide tube 28 of the liquid light guide 10 is supported in a position retaining tube 22 and at least one end of the light guiding tube 28, preferably the light input end, is supported rotatably in the position retaining tube 22.

Abstract: An apparatus for optical examination of documents. The apparatus includes a light source, a viewing unit having a window through which light emitted from the light source exits for examination of documents by an observer. A method for optical examination of a document. The method steps include: providing a light source; emitting light from the light source into a viewing unit; emitting light from the viewing unit through a window; applying fluid to a document to be viewed; and, bringing the document into contact with the window such that an observer can examine the document.

Abstract: Crime scene lighting devices are used in forensic criminology for illumination and investigation at crime scenes using fluorescence excitation. High radiation powers are required both for white light in the so-called general search and for the criminologically relevant UVA-blue-green range. Moreover, it should be possible for the crime scene investigator to use the forensic lighting device portably and independent from the public power supply. The present disclosure relates to a suitable crime scene light device with a mercury ultra high pressure lamp as the light source, a light guide and terminals for operating the lamp selectively with an accumulator or the public power supply system. A suitable carrier bag, a so-called lorgnette with various longpass filters and a cross-section converter for visualizing shoeprints form useful accessories of the forensic lighting device.

Abstract: A liquid lightguide comprising a tube made out of a fluoropolymer, covered on the inside by a thin amorphous coating layer and closed at both ends by transparent plugs to contain within an optically transparent liquid. This liquid can be an aqueous solution of inorganic salts. The coating layer comprises a solid fluoropolymer, like TEFLON® AF, preferably a mixture of a solid fluoropolymer and a liquid fluoropolymer like a perfluoropolyether. This mixture is more economical and promotes a better adhesion of the layer to the tube, and allows for increased flexibility of the tube and smaller tube diameters. The hydrophobic properties of the mixture in contact with the aqueous solution preserves the coating layer composition and thus its optical properties, thus increasing the lifetime of the lightguide.

Abstract: The present invention provides a lightguide having a liquid core and a tubular cladding made from a plastic material, characterized in that the inner surface of the tubular cladding is coated with a layer containing the copolymer consisting of the components TFE and HFP, or TFE and PMVE wherein the weight proportion of the HFP or the perfluoroalkyl vinyl component in the copolymer may vary between 25% and 50%.

Abstract: An illuminator apparatus has a light source and a liquid-core light guide comprising a tubular flexible sheath of a fluorocarbon polymer material which is filled with a lightguiding fluid such as glycol, a salt solution containing a chloride, fluoride or phosophate, phenylmethyl silicone oil (n.apprxeq.1.57), PCTFE oil, polychlorotrifluoroethylene oil (n=approx. 1.40) or also pure water. The tubular sheath is internally coated with a thin film of Teflon AF.RTM., the refractive index of which is lower than that of the sheath material.

Abstract: The specification describes an irradiation device, more particularly for use for causing the polymerization of fillings of resins in dentistry, using radiation in the UVA range which is transmitted from a radiation source via a light guide. The source of UVA radiation is a tungsten incandescent filament lamp with a color temperature of at least 3150.degree. K. and an electrical power of at least 15 Watts. For a defined solid angle, which is not less than 6 sterad, the radiation from the filament of the lamp is collected by an UV reflecting reflector and focussed at a focal point F.sub.1 lying outside the incandescent filament lamp. In the ray path between the filament of the lamp and the focal point F.sub.1 a dielectric thin film reflection filter is provided with a defined angle alpha of inclination .noteq. 0.degree. of the filter normal to the optic axis defined by the incandescent filament and the focal point F.sub.1.