444 results about "Ultraviolet A Radiation" patented technology

A light source apparatus including light spectrum-converting materials that emit light primarily over large portions of the 360 nm-480 nm and the 590-860 nm spectral range is provided. This apparatus provides a cooled, high-luminance, high-efficiency light source that can provide a broader spectrum of light within these spectral ranges than has been cost-practical by using many different dominant peak emission LEDs. Up to 15% of the output radiant power may be in the spectral range 350-480 nm in one embodiment of this device, unless a specific separate source and lamp operating mode is provided for the violet and UV. Control methods for light exposure dose based on monitoring and controlling reflected or backscattered light from the illuminated surface and new heat management methods are also provided. This flexible or rigid light source may be designed into a wide range of sizes or shapes that can be adjusted to fit over or around portions of the bodies of humans or animals being treated, or mounted in such a way as to provide the special spectrum light to other materials or biological processes. This new light source can be designed to provide a cost-effective therapeutic light source for photodynamic therapy, intense pulsed light, for low light level therapy, diagnostics, medical and other biological applications as well as certain non-organic applications.

Contamination is reduced by exposing a specimen to light, such that the light includes ultraviolet and light of wavelength in the visible region, so that the light in the visible region damages the shell of an organism and the ultraviolet light prevents reproduction of the organism.

The device for ultraviolet radiation treatment of body tissues includes a UV light source, a halogen light source and a viewing mechanism all connected to a trifurcation joint by fiber optic cables. All three fiber optics cables are bundled together and exit the trifurcation joint and form a flexible shaft having a distal tip. The distal tip is polished to radiate collimated light. The device allows a user to illuminate the target area in or on the human body via the halogen light, to view the target area via the viewing mechanism, and to treat the body tissue via the UV light source. For destroying pathogens the UV light is calibrated to 253.7 nanometers, a germicidal UV wavelength, by selection of a specific light bulb. The UV light source may be a mercury light bulb and it is maintained at a constant wavelength using a fan to regulate the temperature within the UV light housing.

A UV screening composition comprising particles which are capable of absorbing UV light so that electrons and positively charged holes are formed within the particles, characterised in that the particles are adapted to minimise migration to the surface of the particles of the electrons and / or the positively charged holes when said particles are exposed to UV light in an aqueous environment.

Machines and methods for curing ultraviolet (UV) curable floor coatings are provided. In one embodiment, the machine includes a UV radiation source having one or more lamps where each lamp is operable to simultaneously emit UV radiation at two or more wavelengths and at relatively low power consumption, e.g., no more than about 75 watts per inch of cured coating width. The floor coating includes components that are reactive to these two or more wavelengths such that substantial or complete curing of the floor coating may occur upon simultaneous exposure to the two or more wavelengths. Preferably, the UV radiation emitted by each of the one or more lamps is greater at the two or more wavelengths than at wavelengths other than the two or more wavelengths.