109 results about "Visible Radiations" patented technology

Illumination methods and apparatus, in which a first number of first light sources are adapted to generate first radiation having a first spectrum, and a second number of second light sources are adapted to generate second radiation having a second spectrum different than the first spectrum. In one example, the first number of the first light sources and the second number of the second light sources are different. In another example, a first intensity of the first radiation and a second intensity of the second radiation are independently controlled so as to controllably vary at least an overall perceivable color of generated visible radiation. In yet another example, a first control signal controls all of the first light sources substantially identically, and a second control signal controls all of the second light sources substantially identically.

An LED lamp includes at least one LED chip and a wavelength converting portion including a phosphor for transforming the emission of the LED chip into light having a longer wavelength than that of the emission. The LED lamp further includes filtering member. The filtering member is designed such that the spectral transmittance thereof becomes lower in at least a portion of the wavelength range of 550 nm to 605 nm than in the remaining visible radiation range.

A non-visible radiation imaging system is provided in which an image is obtained based on non-visible radiation of an object. The image can be enhanced to increase its resolution. Additionally, the image can be combined with another image based on visible light for the object. Further, a non-visible radiation inspection system and method are provided that perform an inspection of the object using one or more of the images.

The invention is directed to an apparatus for decolonizing microbes from skin surfaces and body cavities, in particular the decoloniziation of MRSA from nasal cavities using UVC preferably combined with visible light. The device consists of a lightguide, dispensing tip plus accessories, and a housing with a UV source, optical filtering and light collection means, shutter and timer. An internal or external radiometer provides dosimetry information to the operator. The device has additional utility in killing microbes on skin surfaces and beneath nail beds. The lightguide itself comprises the holder for the dispensing tip for use in cavities and as a holder for surface use. The dispensing tips serve to protect decolonization subjects from cross-contamination and may act to shape the nasal cavity and the light distribution pattern of the emitted UVC and visible radiation.

A photodetector having sensitivity in a wide temperature range in both an infrared and an ultraviolet band is provided. The photodetector is formed on a single chip and is designed to be blind to solar or visible radiation. Structures disclosed allow fast and efficient detection of signals with high spatial and temporal resolution. Such sensors may be used for multi-pixel focal arrays and applied for fire detection applications, various space- and military-related applications and other applications. A method for increasing rejection of visible light by the IR sensitive material is also provided.

The invention provides a class of actinically-crosslinkable silicone-containing prepolymers which comprise (1) ethylenically-unsaturated groups and (2) UV-absorbing polymeric units, latent UV-absorbing polymeric units, and / or dual photo-functional polymeric units. The prepolymer of the invention can be used to prepare silicone hydrogel contact lenses capable of absorbing UV / visible radiation. The present invention is also related to silicone hydrogel contact lenses made from a prepolymer of the invention and methods for making the contact lenses in a cost-effective way and with high consistency and high fidelity to the original lens design.

A laser system for use in medical, industrial, commercial or research applications in which the location and energy and power density of a nonvisible (e.g., infrared or ultraviolet) laser beam is defined by a plurality of visible beams. Collimating optics are used to direct both the nonvisible and visible beams on the target, such that when the visible beam is in focus on the target, the nonvisible beam has the optimum energy and power density. One implementation of the invention is a self-contained hand-held surgical laser that provides surgeons with the optimal laser beam parameters for laser tissue soldering.

Disclosed are environmentally friendly, substantially all solids coating compositions which are curable using ultraviolet and visible radiation. In addition, the disclosed coating compositions are suitable for coating wooden objects, such as, but not limited to, wooden products, which may have angular features. In addition, methods are disclosed for coating surfaces, or at least a portion of the surfaces, and curing of the coated surface to obtain partially or fully cured coated surfaces are also disclosed. Furthermore, articles of manufacture incorporating fully cured coated surfaces are disclosed, including, for example moldings. Also disclosed are methods, processes, production lines, articles of manufacture, and factories which incorporate these environmentally friendly, substantially all solids coating compositions curable using ultraviolet and visible radiation.

The detector of visible and near-infrared radiation comprises a near-infrared photosensitive element, a readout circuit for reading the near-infrared photosensitive element, four visible photosensitive elements, one of which being placed facing the near-infrared photosensitive element, and four pigmented resin filters to define a pixel quadruplet. A first pixel, including the near-infrared photosensitive element and one of the visible photosensitive elements, is provided with a resin filter opaque to visible radiation. The three other pixels, respectively including the three other visible photosensitive elements, are respectively provided with filters associated with the three primary colors.

An electrochromic device includes a nanostructured transition metal oxide bronze layer that includes one or more transition metal oxide and one or more dopant. The electrochromic device also includes nanoparticles containing one or more transparent conducting oxide (TCO), a solid state electrolyte, a counter electrode, and at least one protective layer to prevent degradation of the one or more nanostructured transition metal oxide bronze. The nanostructured transition metal oxide bronze selectively modulates transmittance of near-infrared (NIR) and visible radiation as a function of an applied voltage to the device.

This invention generally relates to a composition, an apparatus, and a method for authenticating a product. In particular, the invention relates to an ink composition for marking a product with a continuous inkjet printer. The composition includes a visible ink and a UV, visible, and / or IR marker. Marking includes depositing the ink composition on the product with the continuous inkjet printer. A marked product is authenticated with a hand-held apparatus that activates the marker in the mark with UV radiation. Activation of the marker in the mark changes the absorbance / reflectance of visible radiation by the mark without changing the visual appearance of the mark. Authenticity of the product is assessed by a change in absorbance or reflectance of visible radiation by the mark after activation of the mark.

An electrochromic medium for use in a tristate electrochromic device, comprising: (a) at least one solvent; (b) at least one anodic material; (c) at least one cathodic material, wherein both of the anodic and cathodic materials are electroactive and at least one of the anodic and cathodic materials is electrochromic; (d) wherein, in a first state, the electrochromic medium exhibits a maximum light transmission; (e) wherein, in a second state, variable attenuation occurs to a significant extent in one of visible radiation or near-infrared radiation without significant attenuation in the other; and (f) wherein, in a third state, variable attenuation occurs to a significant extent in the other spectral region.

A sensor with high sensitivity and selectivity for the detection of NO2 uses a simple diode laser operating nominally at 405 nm in the visible region, a high finesse optical cavity and a low noise photon detector. The sensor employs the multimode broad output of the diode laser with the high finesse optical cavity in an essentially off-axis arrangement that can provide large path lengths of the order of a km in a small volume cell. The detected absorption signal corresponds to multiple line integrated absorption spectroscopy (MLIS). Because the sensor uses visible radiation it can employ optics in the visible region that are normally less expensive. Also, the sensor is free from interference from atmospheric water vapor which is often a severe problem for sensors based on mid-infrared quantum cascade lasers operating in the mid-infrared (for example 1650 cm−1) region.

An electrochromic (EC) privacy window includes an EC pane unit including a first EC device having a bright state and a dark state, and a privacy device facing the EC pane unit and having a bright state and a privacy state configured to attenuate visible radiation transmitted through the window. In some embodiments, when the privacy device is in the privacy state, the window has transmitted haze of greater that 80%. In other embodiments, when the privacy device is in the privacy state and the first EC device is in the dark state, the window has a visible transmittance of about 0.1% or less.

An apparatus and method are provided for detecting presence in gas of transient particulate above its normal zero or acceptable level within a duct (4), said apparatus comprising at least one emitter (2) of illumination selected from infra-red, ultraviolet and visible radiation capable of being projected over essentially the entire cross section of the duct (4) and at least one detector (8, 18, 25) for detecting any sparkle of the illumination from the particulate. The apparatus and method are in particular useful for detecting monitoring particulate in areas where build up or presence of particulate can be disadvantageous, for example hospitals and electricity generating stations.

Liquid radiation curable compositions are disclosed which are suitable for hybrid (i.e. cationic and free-radical) polymerization when processed via additive fabrication equipment utilizing sources of actinic radiation with peak spectral intensities in the UV / vis region. Also disclosed are methods of creating three-dimensional parts via additive fabrication processes utilizing sources of actinic radiation with peak spectral intensities in the UV / vis region employing liquid radiation curable compositions suitable for hybrid polymerization, and the parts cured therefrom.

This invention concerns the field of sample identification, in particular a method and apparatuses for identifying or discriminating biological species from non biological species, both as individual particles and as components of a composition, by pump-probe fluorescence spectroscopy for time-resolved detection or imaging. The method uses the finding that the UV-induced fluorescence of biological molecules is varied, in particular is depleted, by the addition of visible radiation, whereas this does not occur with non-biological organic molecules. The invention discriminates the fluorescence signals of bio and non-bio particles or species using a differential approach, i.e. the comparison. of the total fluorescence recorded with and without additional visible radiation. This allows to discriminate biological particles comprising aromatic amino-acids (AA), like peptides, proteins, bacteria, viruses, pollens, spores, etc., from non-biological particles, like aromatic (AH) or polyaromatic hydrocarbons (PAH), carbonaceous aerosols, soot, etc.

The invention discloses a visible-radiation-based water-soluble monomer atom transfer radical polymerization (ATRP) method. Particularly, the method comprises the following steps: 1) preparing a catalyst / ligand complex solution; 2) carrying out ATRP in an n-heptane / ethanol mixed solvent; 3) after the polymerization finishes, adding water to induce the solution to be stratified, and carrying out treatment to obtain a polymer; and 4) adding a new monomer, an initiator and a two-component visible photoinitiator into the recovered catalyst / ligand complex to carry out the next polymerization. The ATRP reaction is carried out under the mild efficient visible radiation, thereby implementing superhigh monomer conversion rate (greater than 95%) within a wider wavelength range, and obtaining the high-controllability polymer. The method can recycle the catalyst, is simple to operate, and has the advantages of high designability, lower cost, time saving and labor saving.

An electrochromic device (ECD) includes an electrochromic cell and, optionally, one or more additional electrochromic cells where all cells are parallel, and where at least one of the electrodes of one of the cells comprises a single-walled carbon nanotube (SWNT) film The electrochromic cells allow the control of transmittance of two or more different portions of the electro-magnetic spectrum through the ECD. One cell can control the transmittance of visible radiation while the other cell can control the transmittance of IR radiation. The ECD can be employed as a “smart window” to control the heat and light transmission through the window. The ECD can be in the form of a laminate that can be added to an existing window.

The present invention concerns a data storage material that comprises an assembly of oligo atomic metal clusters confined in molecular sieve for converting invisible radiation emitted by a radiation source at or above room temperature to visible light. By irradiation of specific patterns within this material with UV or visible light, the emission from these patterns is irreversibly enhanced.

An electrochromic medium for use in a tristate electrochromic device, comprising: (a) at least one solvent; (b) at least one anodic material; (c) at least one cathodic material, wherein both of the anodic and cathodic materials are electroactive and at least one of the anodic and cathodic materials is electrochromic; (d) wherein, in a first state, the electrochromic medium exhibits a maximum light transmission; (e) wherein, in a second state, variable attenuation occurs to a significant extent in one of visible radiation or near-infrared radiation without significant attenuation in the other; and (f) wherein, in a third state, variable attenuation occurs to a significant extent in the other spectral region.

The invention relates to an optical modulator. A micro-opto-electro-mechanical systems (MOEMS) electro optical modulator (2) having an electrically tuneable optical resonator comprises an asymmetric Fabry-Perot etalon incorporating a mirror (10) resiliency biased with respect to a substrate (13) and moveable in relation thereto in response to a voltage applied there-between. The optical modulator (2) is capable of modulating electromagnetic radiation having a plurality of wavelengths. The modulator is adapted to modulate the transmission of short wave infrared radiation (SWIR), medium wave infrared radiation (MWIR) and long wave infrared radiation (LWIR) and the reflection of visible radiation. A spatial optical modulator having a plurality of said MOEMS optical modulators (2). A method of addressing said spatial optical modulator.

The invention relates to a low-pressure gas-discharge lamp which, with its light in the red spectral region, influences the biological circadian rhythm by controlling melatonin secretion. The tubular glass discharge vessel, which can also be in the shape of a double helix, is filled with a noble gas or noble-gas mixture and mercury. Electrodes for the supply of energy are arranged at both ends of the discharge vessel. The discharge vessel is multicoated on the inside by phosphor layers applied one after the other. The first phosphor layer located on the glass surface consists of phosphor which is excited both by ultraviolet mercury radiation between 180 nm and 400 nm and also by the blue radiation between 400 nm and 490 nm emitted by the mercury discharge, and by the visible radiation emitted by the second or further phosphor layers between 400 nm and 550 nm, where visible light having emission maxima in the region between 500 nm and 650 nm is generated. In combination with light sources for melatonin suppression, the low-pressure gas-discharge lamp is, with its warm light, particularly suitable for stimulation of the quasi-circadian rhythm in an individual in the absence of external conditions, such as sunlight. Owing to its good colour reproduction and high energy efficiency, it meets all necessary requirements of a light source for illumination tasks and is thus also suitable for general lighting.

In traveling-wave ring-resonator an optically nonlinear crystal for converting visible radiation to ultraviolet (UV) radiation has an input face and two output faces. The visible light propagates through the crystal from the input face to one of the output faces. That output face is coated with a dichroic optical coating that transmits unconverted visible light and reflects the ultraviolet light. The reflected ultraviolet light exits the optically nonlinear crystal via the other output face and is coupled out of the resonator at an angle to the resonator axis.