26836 results about "Ultraviolet lights" patented technology

A disposable downhole tool comprises a material that dissolves when exposed to a chemical solution, an ultraviolet light, a nuclear source, or a combination thereof. In an embodiment, the material comprises an epoxy resin, a fiberglass, or a combination thereof. In another embodiment, the material comprises a fiberglass and a binding agent. The material may also be customized to achieve a desired dissolution rate of the tool. In an embodiment, the disposable downhole tool further comprises an enclosure for storing the chemical solution. The tool may also comprise an activation mechanism for releasing the chemical solution from the enclosure. In an embodiment, the disposable downhole tool is a frac plug. In another embodiment, the tool is a bridge plug. In yet another embodiment, the tool is a packer.

A semi-conductor based imager includes a microlens array having microlenses with modified focal characteristics. The microlenses are made of a microlens material, the melting properties of which are selectively modified to obtain different shapes after a reflow process. Selected microlenses, or portions of each microlens, are modified, by exposure to ultraviolet light, for example, to control the microlens shape produced by reflow melting. Controlling the microlens shape allows for modification of the focal characteristics of selected microlenses in the microlens array.

Various phosphorescence charging systems are provided for charging a phosphorescent wheel. The wheel is attached to the frame of a vehicle with nighttime or low light operation capability. The phosphorescence charging system directs electromagnetic radiation, such as ultraviolet light, onto phosphorescent portions of the wheel so as to cause subsequent phosphorescent emission therefrom.

This invention concerns an epoxy coating for use as a non-skid surface for applications such as the deck of an aircraft carrier. The epoxy coating can be formulated from (a) an amine curing agent, (b) an epoxide-containing toughening agent such as a polysulfide and / or a polythioether, (c) an epoxy resin, (d) a rubber toughening agent, and (e) an optional fire retardant, a glass fiber thixotrope and impact toughening agent, an optional pigment, an optional corrosion inhibitor, an optional moisture penetration inhibitor, an optional ultraviolet light stabilizer, an optional abrasive aggregate, or a combination thereof.

A system for creating a flickering effect comprising a simulated candle housing, a light communicating channel on the housing, a source of ultraviolet light disposed in the channel, and a simulated flame having ultraviolet material thereon movable back and forth from its vertical axis mounted in the housing, the light focused on the simulated flame simulating a flickering flame.

A light-emitting device (2) including a light-emitting element (2a), a first phosphor (2b), and a second phosphor (2c). The light-emitting element (2a) emits light L1 having a wavelength range within the visible region. Upon receipt of the light L1, or light L3 originating from the second phosphor (2c), the first phosphor (2b) emits light L2 having a wavelength range, which differs from that of the first light L1 and the third light L3, but falls within the visible region. Upon receipt of a specific wavelength component (ultraviolet light, or the like) included in external light, the second phosphor (2c) generates the light L3 whose wavelength range is substantially the same as that of the light L1, thereby radiating the first phosphor (2b) with the light L3.

Hydrogels of polymerized and crosslinked macromers comprising hydrophilic oligomers having biodegradable monomeric or oligomeric extensions, which biodegradable extensions are terminated on free ends with end cap monomers or oligomers capable of polymerization and cross linking are described. The hydrophilic core itself may be degradable, thus combining the core and extension functions. Macromers are polymerized using free radical initiators under the influence of long wavelength ultraviolet light, visible light excitation or thermal energy. Biodegradation occurs at the linkages within the extension oligomers and results in fragments which are non-toxic and easily removed from the body. Preferred applications for the hydrogels include prevention of adhesion formation after surgical procedures, controlled release of drugs and other bioactive species, temporary protection or separation of tissue surfaces, adhering of sealing tissues together, and preventing the attachment of cells to tissue surfaces.

Method of printing with ultraviolet photosensitive resin-containing materials includes depositing at least one substance that includes an ultraviolet photosensitive resin on to a substrate, partially curing the substance by irradiating the substance with at least one ultraviolet light emitting device, and completely curing the substance. Substance curing system including a substrate, an applicator that deposits a substance that includes an ultraviolet photosensitive resin on to a substrate, and at least one ultraviolet light emitting device usable to irradiate the substance to partially cure and / or completely cure the substance.

The image forming apparatus comprises: an ink discharge device comprising a plurality of full line type inkjet heads arranged separately for a plurality of inks of different colors, each of the inkjet heads having a nozzle row in which a plurality of nozzles for discharging droplets of the ink toward a surface of a recording medium are arranged through a length corresponding to a full width of the recording medium; an ink supply device which supplies ultraviolet curable inks of corresponding colors to the inkjet heads; a conveyance device which causes the inkjet heads and the recording medium to move relatively to each other by conveying at least one of the recording medium and the inkjet heads in a direction substantially perpendicular to a breadthways direction of the recording medium; a first curing device which irradiates ultraviolet light for causing the droplets of the ink, deposited on the surface of the recording medium by one of the inkjet heads on an upstream side in a direction of relative conveyance of the recording medium with respect to the inkjet heads, to semi-cure to a degree whereby the droplets of the ink discharged from the inkjet head on the upstream side do not mix on the surface of the recording medium with the droplets of the ink discharged by a next one of the inkjet heads situated on a downstream side in the direction of relative conveyance, the first curing device comprising an ultraviolet light source including a group of light emitting elements arranged in a linear form and disposed between the inkjet heads of the respective colors; and a second curing device which irradiates ultraviolet light for performing main curing of the droplets of the ink on the recording medium to a degree whereby image degradation does not occur upon subsequent handling of the cured droplets of the ink, the second curing device being disposed after one of the inkjet heads situated in a furthest downstream position of the inkjet heads.

A lighting device comprising one or more solid state light emitters which emit ultraviolet light, one or more other emitters which emit light in the range of 430 nm to 480 nm and one or more other emitters which emit light in the range of 555 nm to 585 nm, to make a mixture which in the absence of any other light would be within an area defined by coordinates (0.32, 0.40), (0.36, 0.48), (0.43, 0.45), (0.42, 0.42), and (0.36, 0.38). One or more of the other emitters is a lumiphor. One or more of the other emitters can be a solid state light emitter. The lighting device may further comprise one or more 600 nm to 630 nm light emitters, and the lighting device may emit light within ten MacAdam ellipses of the blackbody locus. Also, packaged solid state light emitters and methods of lighting.

A method for the inactivation of Cryptosporidium oocysts, Giardia cysts and similar organisms comprising irradiating water with ultraviolet light in doses of from about 1 mJ / cm2 to about 175 mJ / cm2.