201 results about "Uv spectrum" patented technology

The present invention provides digital watermarks through multiple channels. The channels can include, e.g., visible, ultraviolet and infrared channels. The non-visible channels can be selected to fluoresce either in the visible or IR / UV spectrums upon the appropriate illumination in the infrared or ultraviolet spectrums. The watermarks in the various multiple channels can cooperate to facilitate watermark detection or to authenticate an object in which the watermarks are embedded. In other implementations the multiple watermarks include so-called orientation components. A relative relationship between the orientation components is used to convey data.

A system and method for determining location of a fluid leak at a drape of a reduced pressure delivery system being used on a tissue site of a patient may include applying a reduced pressure to the tissue site of the patient. The drape may be imaged to generate image data, and a determination of a location of a fluid leak of the drape may be made from the image data. As a result of the determination of the location of the fluid leak, the drape may be corrected. The imaging may be made in a non-visible spectrum. The non-visible spectrum may be in an IR spectrum or UV spectrum. In one embodiment, a fluid, such as compressed air, may be applied to the dressing via the interface between the drape and tissue of the patient to improve imaging in the non-visible spectrum.

The invention is a polarized sunglass lens that utilizes a multiband contrast enhancer comprised of three rare-earth oxides to provide relatively high peak transmittance in portions of the red and green spectrum, relatively lower transmittance for the blue spectrum, and very low transmittance for the UV spectrum. The lens provides enhanced perception of colors, heightened contrast, and improved visual acuity. The inclusion of vanadium pentoxide in the lens provides attenuation of the UV spectrum, thus protecting the user's eyes and the internal layers and colorants from UV-induced damage. The front lens element can be either the multiband contrast enhancer or a photochromic lens element.

A method for improving thermal dissipation in large gallium nitride light emitting diodes includes replacing sapphire with a better thermal conductor resulting in more efficient removal of thermal energy. A method for achieving a reliable and strong temporary bond between a GaN epitaxial layer and a support wafer. A method for transferring an epitaxial film from a growth substrate to a secondary substrate. An excimer laser initiates film delamination from the growth substrate. The laser beam is shaped by a shadow mask and aligned to an existing pattern in the growth substrate. A method for fabricating a LED that radiates white spectrum light. A phosphor that radiates a white spectrum after excitation in the blue or UV spectrum onto the GaN epitaxial wafer prior to die separation and packaging. A method for depositing a metal substrate onto a GaN epitaxy layer.

An inorganic, dielectric grid polarizer device includes a stack of film layers disposed over a substrate. Each film layer is formed of a material that is both inorganic and dielectric. Adjacent film layers each have different refractive indices. At least one of the film layers is discontinuous to form a form-birefringent layer with an array of parallel ribs having a period less than 400 nm. Another layer, different than the form-birefringent layer, is formed of an optically absorptive material for the ultra-violet spectrum.

An inorganic, dielectric grid polarizer device includes a stack of film layers disposed over a substrate. Each film layer is formed of a material that is both inorganic and dielectric. Adjacent film layers each have different refractive indices. At least one of the film layers is discontinuous to form a form-birefringent layer with an array of parallel ribs having a period less than 400 nm. Another layer, different than the form-birefringent layer, is formed of an optically absorptive material for the ultra-violet spectrum.

A phase difference plate which comprises one sheet of polymer film containing a compound having a rod-shaped molecular structure and exhibiting a maximum absorption wavelength (lambdamax) of less than 250 nm in an ultraviolet spectrum of its solution and which exhibits a retardation value as measured at a wavelength of 450 nm (Re450) of 60 to 135 nm and a retardation value as measured at a wave-length of 590 nm (Re590) of 100 to 170 nm, where the relationship: Re590-Re450>=2 nm is satisfied. The phase difference plate functions as a lambda / 4 plate.

The invention provides a detector for detecting total organic carbon (TOC) in sewage, mainly comprising a sample pool capable of being transmitted by ultraviolet rays, a UV optical splitter and a data processor of the organic carbon. The detector is characterized in that UV can emit 240-450nm of UV beams, and a neon lamp is used as a UV light source; the optical splitter is a UV reflective blazed grating, and the light strength of the light beams at each wavelength is detected by a linear array UV CCD (Charged Coupled Device); and the TOC value is determined according to the relationship between the absorbance at the feature wavelength and the TOC content. As known from the scheme, the detector has low cost and good stability and is capable of fully realizing automation and accurately measuring the TOC value so as to comprehensively reflect the pollution degree of the organic matter in the water. Thus, the detector has important help and realistic significance for monitoring and measuring the sewage discharge and the water pollution on the ground surface.

Personal care compositions comprising a polymer-bound UV absorber are described that provide enhanced properties, including customizable UV spectrum protection, broad-spectrum UV spectrum protection, water resistance, and labile UV stabilization. The polymer comprises anhydride functionality, such as maleic anhydride or a derivative thereof, and the UV absorber contains at least one hydroxyl, primary amine, or secondary amine group.The personal care compositions may be used to treat and / or protect against burns, cancers, erythema, lentigo (“liver spots”), keratotic lesions, wrinkles, and cellular changes of the skin; and / or color changes, embrittlement, lack of luster, tangles, split ends, and / or unmanageability of the hair.

The present invention provides digital watermarks through multiple channels. The channels can include, e.g., visible, ultraviolet and infrared channels. The non-visible channels can be selected to fluoresce either in the visible or IR / UV spectrums upon the appropriate illumination in the infrared or ultraviolet spectrums. The watermarks in the various multiple channels can cooperate to facilitate watermark detection or to authenticate an object in which the watermarks are embedded. In other implementations the multiple watermarks include so-called orientation components. A relative relationship between the orientation components is used to convey data.

An apparatus for monitoring the condition of a lubricating medium includes a UV light source, a UV receiver, a processor electrically coupled to both the UV light source and the UV receiver, and a memory device electrically coupled to the processor. The memory device has stored therein a plurality of instructions which, when executed by the processor, cause the processor to (a) communicate with the UV light source and the UV receiver so as to expose a sample of the lubricating medium to the UV light and generate a UV spectrum of the sample in response thereto, and (b) compare the UV spectrum of the sample to a model spectrum and generate a control signal if the UV spectrum of the sample has a predetermined relationship to the model spectrum.

The invention provides a method for calibrating the wavelength of an ultraviolet spectrograph. A 532 nanometer base frequency laser device, a frequency stabilization system, a frequency doubling system and a servo control system are mainly used in the method. The whole working process of a device comprises that the laser of the 532 nanometer base frequency laser device is divided into two channels through a light splitting element; one channel of the laser of the 532 nanometer base frequency laser device passes through the frequency stabilization system; the frequency stabilization system provides a stable reference frequency; if the frequency of base frequency laser deviates from the reference frequency, the frequency stabilization system can produce a feedback signal; the feedback signal passes through the servo control system, the cavity length of the base frequency laser device is adjusted, a 532 nanometer base light frequency is ensured to be always equal to the reference frequency provided by the frequency stabilization device, and the stability of a 532 nanometer laser frequency is guaranteed; the other channel of the laser of the 532 nanometer base frequency laser device passes through the frequency doubling system, so that 266 nanometer ultraviolet laser is generated; because the 532 nanometer light base frequency is stable, the frequency of 266 nanometer frequency doubled laser is also kept stable; after passing through an optically coupled system, the 266 nanometer ultraviolet laser enters the ultraviolet spectrograph, and then the ultraviolet spectrograph is calibrated.

A nonlinear optical crystal having a chemical formula of YiLajAlkB16O48, where 2.8≦i≦3.2, 0.8≦j≦1.2, i and j sum to about four, and k is about 12 is provided. The nonlinear optical crystal is useful for nonlinear optical applications including frequency conversion. Nonlinear optical crystals in a specific embodiment are characterized by UV blocking materials (e.g., some transition metals and lanthanides) at concentrations of less than 1,000 parts per million, providing high transmittance over portions of the UV spectrum (e.g., 175-360 nm).

The invention relates to a testing technique for testing transmission characteristics of spectral radiation, particularly to a testing device for testing transmission characteristics of ultraviolet-vacuum ultraviolet spectral radiation. The testing device comprises a monochrometer, a standard light source, a vacuum container, a photomultiplier tube disposed in the vacuum container and fixed at one side of a rotary table, a cryogenic pump and a molecular pump respectively communicated with the cavity of the vacuum container via two gate valves, a dry vacuum pump communicated with the cavity pipeline of the vacuum container, and a cryogenic unit communicated with the vacuum container via a pipeline, wherein a flange interface is provided at one end of the vacuum container and used for alternatively connecting with the monochrometer or standard light source; the movement platform capable of performing translational movement with respect to the vertical direction of the axial line of the interface is disposed in the vacuum container, and the rotary table is disposed on the movement platform. The invention can be used for high-precision calibration of the spectral radiation brightness and the spectral irradiance responsibility of the entire machine of an ultraviolet spectra remote sensing instrument; and can be used for testing the spectral responsibility of an ultraviolet detector and testing the spectral transmission characteristics of an ultraviolet optical element.

The invention discloses a transient ultraviolet multispectral radiometer, comprising a plug-pull type aiming lens, a guide rail component, a cassegrain imaging system, an ultraviolet spectrograph, a CCD driving circuit, a high-speed collection storage system and a computer which is provided with a spectrum measure data processing soft package. The cassegrain imaging system aims at a light source to be detected with the help of the aiming lens, adjusts self-focal distance and makes the light source to be detected for imaging clearly on the incidence slit of the ultraviolet spectrograph; the output optical signal of the ultraviolet spectrograph is converted to an electrical signal through the CCD driving circuit and is collected and stored by the high-speed system, and then is transmitted to the computer by a USB line. The spectrum measure data processing soft package calculates the spectrum power curve, the peak value wavelength, the corresponding power value of the light source to be detected according to relevant calculation means. The invention not only can detect the ultraviolet spectrum of the microsecond transient line light source and the transient side light source during single flashing time, but also can detect the ultraviolet spectrum of the steady state radiation light source including weak energy or the far radiation light source, and has good application prospect.

A method for fabricating an LED that radiates white spectrum light. A phosphor that radiates a white spectrum after excitation in the blue or UV spectrum is uniformly deposited onto a GaN epitaxial wafer prior to die separation and packaging. This allows wafer-level processing and probing of white LEDs and produces true white LED chips.

The invention relates to a method and a device for calibrating vacuum ultraviolet spectral radiometers. The method comprises spectral radiant luminance responsivity calibration, spectral radiant irradiance responsivity calibration and / or wavelength accuracy calibration, which are conducted in an oil-free vacuum chamber. The device comprises a spectral radiant luminance responsivity calibration mechanism, a spectral radiant irradiance responsivity calibration mechanism, and a wavelength accuracy calibration mechanism. There is no calibration device suitable for vacuum ultraviolet spectral radiometers in our country at present. By using the method and the device for calibrating vacuum ultraviolet spectral radiometers of the invention, the multiple parameters of a vacuum ultraviolet spectral radiometer can be calibrated in a ground laboratory before emission, and therefore, the accuracy of data acquired by the vacuum ultraviolet spectral radiometer is guaranteed. The method and the device are of great significance to the acquisition of spectral information of the sun, the earth surface and other sun-earth space environments.

Burdock synanthrin and its preparation method. the matter is extracted from root of burdock, white or weak yellow amorphous loose solid powder, freely soluble in water, slightly sweet, stable thermally. The left of optical rotation in water is -29.8í

Multiple wavelength spectrometers can be tuned to particular wavelengths. A dual wavelength spectrometer can include a spectrometer configured to detect at least some wavelengths that fall within the ultraviolet (UV) spectrum and a spectrometer configured to detect at least some wavelengths that fall within the visible spectrum. In some embodiments, a UV light spectrometer and a visible light spectrometer are disposed adjacent one another on a single substrate. A dual wavelength spectrometer can be used for analyzing bioaerosols, as well as for numerous other applications.

In embodiments of the present invention a second, different waveplate is introduced into a single rotating compensator normal incidence ellipsometer. The second waveplate provides a quarter wavelength retardation that is different from and complementary to that of the first waveplate in order to increase the spectral range for which useful retardation is available, especially towards the deep UV spectrum. The sensitivity for the system may also be increased in the conventional spectral range, since each of the two waveplates may be optimized for its own, somewhat more narrow spectral range of operation. With the proper choice of two waveplates of different retardation, the useful spectral range may be extended from typically 190-820 nm to 150-1000 nm, and beyond if necessary, while increasing the sensitivity within the conventional wavelength range at the same time.

An indicator hand illumination arrangement for use in an electronic device that comprises a casing, a dial positioned in the casing, at least one indicator hand positioned intermediate the dial and a cover for at least in part protecting the at least one indicator hand and the dial, wherein the arrangement comprises a light emitting element coupled to the cover, for emitting lightwaves in the UV spectrum towards the at least one indicator hand and in a direction perpendicularly to the dial surface; wherein the at least one indicator hand has a proximate end that is coupled to a stem and a distal end, the at least one indicator hand having a top surface, an inner and outer bottom surface, and a angled surface angled non-perpendicularly to the angle of the lightwaves; such that lightwaves that emanate from the light emitting element deflect off of the angled surface and propagate in a direction towards the distal end of the at least one indicator hand.

A method for critical dimension control in which a substrate is received having an underlying layer and a radiation-sensitive material layer thereon. The radiation-sensitive material is exposed through a patterned mask to a first wavelength of light in the UV spectrum, and developed a first time. The radiation-sensitive material is flood exposed to a second wavelength of light different from the first wavelength of light and developed a second time to form a pattern. Prior to flood exposure, the radiation-sensitive material has a first light wavelength activation threshold that controls generation of acid to a first acid concentration in the radiation-sensitive material layer and controls generation of photosensitizer molecules in the radiation-sensitive material layer, and a second light wavelength activation threshold different than the first light wavelength activation threshold that can excite the photosensitizer molecules resulting in the acid comprising a second acid concentration greater than the first acid concentration.

The invention relates to a flue gas analysis and measurement method implemented through an ultraviolet spectrum and belongs to the technical field of flue gas detection. The flue gas analysis and measurement method through the ultraviolet spectrum includes the steps that, the part with light intensity slowly changing with wave length is eliminated in an absorption spectrum, only the part with light intensity rapidly changing with the wave length is left, and then the part with light intensity rapidly changing with the wave length is utilized to conduct inversion on the concentration of gas, so that measured value fluctuation and drifting caused by light source temperature drift or attenuation, dust interference, interference of other gas and other factors are avoided, according to the adopted technical scheme, a differential optical absorption spectroscopy (DOAS) is utilized, in other words, the part with light intensity slowly changing with wave length is eliminated in the absorption spectrum, only the part with light intensity rapidly changing with the wave length is left, and then the part with light intensity rapidly changing with the wave length is utilized to conduct inversion on the concentration of gas. The flue gas analysis and measurement method is widely applied to analysis and measurement of flue gas.

The invention belongs to the technical field of spectral analysis, and discloses a method for evaluating tobacco alcoholization quality through ultraviolet spectrum. The method comprises the following steps: extracting different polarity components of tobacco by adopting four different solvent of petroleum ether, chloroform, absolute ethyl alcohol and water, scientifically establishing a multiple regression model of ultraviolet spectrum peak area and sensory quality of the four solvent parts according to ultraviolet spectrum difference caused by different tobacco alcoholization quality, and evaluating the sensory quality of the tobacco by utilizing the multiple regression model, wherein components extracted from the four solvent parts comprise tobacco liposoluble components and water-soluble components, and the tobacco alcoholization quality can be evaluated quickly, conveniently, fast and macroscopically. The method for evaluating tobacco alcoholization quality through ultraviolet spectrum has relatively good stability and reproducibility.

The invention discloses a novel multilayer film capable of improving extreme ultraviolet spectrum purity and thermal stability and belongs to the filed of extreme ultraviolet lithography. The novel multilayer film is a periodic multilayer film, and substrate of the periodic multilayer film is plated with a silicon (Si) layer and a molybdenum (Mo) layer in sequence, wherein the Si layer and the Mo layer are alternant. The novel multilayer film further comprises a thermal stability layer which is manufactured on the periodic multilayer film, wherein the Si layer and the Mo layer are alternant on the periodic multilayer film. The novel multilayer film capable of improving the extreme ultraviolet spectrum purity and the thermal stability can guarantee that reflectivity losses of extreme ultraviolet wavebands can be ignored and restrains reflectivity of wavebands out of band effectively on the condition that appearances of films are not changed, optical elements are not increased, radial directions of light are not changed and processing steps are not added in addition through the periodic multilayer film with an alternant Si layer and a Mo layer being plated with a silicon nitride (Si3N4) thermal stability layer.

The present invention relates to a composition suitable for topical application to skin to provide protection to the skin when exposed to UV radiation, the composition including a sunscreen in amounts effective to absorb, reflect or scatter radiation in at least a portion of the ultraviolet spectrum, a marine nucleotide in amounts effective to mitigate effects on intracellular ion concentration and a cosmetically-acceptable topical carrier.

An ultra-broadband ultraviolet (UV) catadioptric imaging microscope system with wide-range zoom capability. The microscope system, which comprises a catadioptric lens group and a zooming tube lens group, has high optical resolution in the deep UV wavelengths, continuously adjustable magnification, and a high numerical aperture. The system integrates microscope modules such as objectives, tube lenses and zoom optics to reduce the number of components, and to simplify the system manufacturing process. The preferred embodiment offers excellent image quality across a very broad deep ultraviolet spectral range, combined with an all-refractive zooming tube lens. The zooming tube lens is modified to compensate for higher-order chromatic aberrations that would normally limit performance.

A method for predicting properties of lubricant base oil blends, comprising the steps of generating an NMR spectrum, HPLC-UV spectrum, and FIMS spectrum of a sample of a blend of at least two lubricant base oils and determining at least one composite structural molecular parameter of the sample from said spectra. SIMDIST and HPO analyses of the sample are then generated in order to determine a composite boiling point distribution and molecular weight of the sample from such analysis. The composite structural molecular parameter, the composite boiling point distribution and the composite molecular weight are applied to a trained neural network trained to correlate with the composite structural molecular parameter, the composite boiling point distribution and the composite molecular weight so as to predict composite properties of the sample. The properties comprise Kinematic Viscosity at 40 C, Kinematic Viscosity at 100 DEG C, Viscosity Index, Cloud Point, and Oxidation Performance.

A species-specific gas sensor and monitor comprising a light source, a sample enclosure or measurement chamber, an optical interface between the light source, the sample and the detection system, electronics that integrate the light source and the detection system, and computational components, such as an onboard microprocessor for calculation of the gas composition and communications between the sensor and the vehicle electronics. The species-specific gas sensor of the present invention can be used to target gases, such as nitric oxide (NO), nitrogen dioxide (NO2) ammonia (NH3), and sulfur dioxide (SO2) which are measurable in the UV spectrum.