84 results about "Violet light" patented technology

The invention discloses a silicon photomultiplier and a preparation method thereof, belongs to the technical field of semiconductor device processing, and aims to solve the problems of lattice damage, channel effect, interface defects and the like caused by single-time high-dose ion implantation in the traditional process. Through the innovative processes of dose grading ion implantation, stepped cooling annealing, Gepre-amorphization processing, atomic layer deposition passivation and the like, the dark counting rate of the device is remarkably reduced, and the photon detection efficiency and the avalanche gain stability are improved. The prepared silicon photomultiplier comprises an optimally designed doped region and an Al2O3 / SiNx composite passivation layer, has excellent detection performance in a blue-violet light band, and can be widely applied to high-sensitivity detection fields such as biomedical imaging, nuclear radiation detection and laser radar.

The invention provides a high-crystallinity near-infrared emission wurtzite CdS quantum dot / Zn < 2 + > modified CdS quantum dot as well as a preparation method and application thereof, and belongs to the technical field of semiconductor quantum dots. The preparation method comprises the following steps: mixing cadmium oxide, a very small amount of zinc acetate, oleic acid and octadecene, heating for degassing, heating to a reaction temperature, and adding an S-ODE precursor for reaction to obtain the zinc-modified wurtzite CdS quantum dot. The CdS quantum dots synthesized under the condition of high concentration are of a wurtzite structure and have high crystallinity, the particle size is remarkably increased, a small amount of zinc acetate is added, disordered nucleation and growth processes under a high-concentration reaction system are effectively separated through a surface adsorption process, and the monodispersed wurtzite CdS quantum dots are obtained. According to the invention, the LED device is prepared by integrating the optimized CdS quantum dots and the 450nm purple light chip, and the dual functions of visible light illumination and night vision application are realized.

The utility model provides commodity shooting equipment. The commodity shooting equipment comprises a cavity defined by a plurality of panels, a lighting device and a plurality of shooting devices. The lighting device comprises a white light source and a purple light source which are respectively used for lighting commodities under conventional and specific conditions. The white light source shoots a plurality of view views of the commodity under a normal light condition. The purple light source is used for exciting a fluorescent agent in the commodity batch number ink to enable the fluorescent agent to emit visible light. This contributes to the detection of tampered batch numbers because the fluorescent agent emits a different color or brightness from the surrounding material under ultraviolet light. The shooting device is located outside the cavity and shoots commodities in the cavity through the lens through hole in the panel. The arrangement of the plurality of shooting devices can ensure that detailed information of commodities can be captured from a plurality of angles. By combining the white light source and the purple light source, the device can simultaneously meet the requirements of conventional shooting and specific fluorescence detection, and the purple light source can accurately excite the fluorescent agent, so that a tampered batch number can be identified.

The invention relates to a broad-band cyan luminescent material excited by purple light and a preparation method and application thereof, and is characterized in that the crystal structure of the broad-band cyan luminescent material is a hexagonal crystal system, the space group is P63mc, and the broad-band cyan luminescent material belongs to a hexagonal perovskite structure type compound; the structural formula of the cyan luminescent material is Ba5La2-xScMgAl3O15: xCe < 3 + >, wherein x is more than or equal to 0.005 and less than or equal to 0.20. Compared with the prior art, the Ce < 3 + >-doped broadband cyan luminescent material is successfully prepared by taking a hexagonal perovskite structure Ba5La2ScMgAl3O15 with strong crystal stability, high thermal stability, high structural symmetry and high doping tolerance as a matrix and doping different amounts of active ions Ce < 3 + > to replace the lattice position of La.

To provide a device and a method for preventing, improving, or preventing a worsening of depression by irradiating light having specific wavelengths, such as violet light, as well as a method for operating the device. The problem is solved by a device and a method used for the purpose of preventing, improving, or preventing a worsening of depression by irradiating a subject with violet light having a wavelength within a range of 360 to 400 nm. An operating method of a device is a method for operating a device including irradiation means for irradiating a subject with violet light having a wavelength within a range of 360 to 400 nm and used for the purpose of preventing, improving, or preventing a worsening of depression. The operating method comprises operating the irradiation means of the device by changing, by transmission and reception with an isolation controller such as a mobile terminal, one or more irradiation conditions selected from an irradiation state (including continuous light or blinking frequency), an irradiance, an irradiation time, an irradiation start time, and an irradiation end time.

The invention provides a disinfection lighting device configured to provide device light along a main optical axis, said disinfection lighting device comprising: a first solid-state light source configured to emit white light: a second solid-state light source configured to emit violet light having a dominant peak wavelength in a wavelength range from 380 to 420 nm: a collimator configured to collimate said white light along the main optical axis into a white light beam having a first spatial light distribution having a first Full Width Half Maximum (FWHM1): a batwing optic configured to shape said violet light along the main optical axis into a batwing shaped light distribution, wherein the batwing shaped light distribution has a maximum intensity at an angle (α) with respect to said main optical axis: wherein said angle (α) of a maximum intensity of the batwing shaped light distribution is outside said first Full Width Half Maximum (FWHM1) of the first spatial light distribution of the white light beam.

The invention relates to the field of luminescent materials, and particularly discloses near ultraviolet excited blue fluorescent powder and application thereof, the molecular formula of the fluorescent powder material is Ca3Lu2Si3O12: xCe < 3 + >, x is the molar doping amount of Ce < 3 + >, 0 lt; and x is less than or equal to 0.10. The preparation method of the series of blue fluorescent powder adopts a high-temperature solid-phase method for synthesis, is mature in process and has large-scale production potential. The fluorescent powder shows nearly 100% internal quantum efficiency, the value of the internal quantum efficiency is as high as 99%, the fluorescent powder has broadband emission in the range of 350-600nm and has high matching degree with a blue light absorption band of a plant photosynthetic pigment, and a blue light LED device with high brightness and good matching with plant pigment absorption can be obtained by assembling the blue light material and a 365nm purple light chip.

The present disclosure relates to a composition comprising a phenylacrylonitrile compound of formula (I) for the use in absorbing blue-violet light, the method of producing the same, and the product comprising the same.

To provide an optical member and eyewear that suppress variations in yellowness of lenses and transmit violet light. [Solution] An optical element 10 having a laminated structure including a hard coat layer and a multilayer anti-reflection film layer, wherein the laminated structure has an average transmittance of 70% or more in the wavelength range of 360 nm or more and 400 nm or less, an average transmittance of 80% or more in the wavelength range of 380 nm or more and 500 nm or less, and an average transmittance of 5% or less in the wavelength range of 280 nm or more and 360 nm or less.

The invention relates to the field of lighting devices, and particularly discloses a light-emitting device for a beauty mask, which comprises a purple light unit and a fluorescent glue layer, and the purple light unit is used for emitting purple light. Irradiation light emitted by the light-emitting device comprises light of a first wave band, light of a second wave band and light of a third wave band; the wavelength range of the light of the first wave band is 400 nm to 530 nm, the wavelength range of the light of the second wave band is 600 nm to 660 nm, and the wavelength range of the light of the third wave band is 810 nm to 1100 nm; in the irradiation light, the proportion of the light of the first wave band is smaller than or equal to 45%, the proportion of the light of the second wave band is larger than or equal to 10%, and the proportion of the light of the third wave band is larger than or equal to 10%. Based on the irradiation light of the specific wave band, the synergistic effect of oil control and inflammation resistance of surface skin, repairing and tightening of middle skin and structure remodeling of deep skin can be achieved, the skin state is effectively improved, and the effect of maintaining beauty and keeping young is achieved.

This invention belongs to the field of optoelectronic devices and discloses a perovskite heterojunction blue-violet narrowband photosynapse and its application. The device uses a heterojunction composed of a poly[bis(4-phenyl)(2,4,6-trimethylphenyl)amine] (PTAA) hole-conducting layer and a perovskite thin film as its functional unit to achieve blue-violet narrowband photosynaptic function. By optimizing the thickness of the PTAA hole-conducting layer to suppress the short-wavelength ultraviolet light response, and by controlling the halogen atom type and ratio of the perovskite thin film to optimize the light absorption range of the film, the device generates a narrowband synaptic response only in the blue-violet light band with wavelengths in the range of 380nm to 490nm, thus realizing the blue-violet narrowband photosynaptic function. The device of this invention combines excellent blue-violet narrowband response, stable synaptic plasticity, and high anti-interference capability, exhibiting excellent performance in fields such as fingerprint recognition and possessing outstanding practical value.

The invention relates to a broad-band cyan luminescent material excited by purple light as well as a preparation method and application of the broad-band cyan luminescent material. The crystal structure of the broadband cyan luminescent material is a cubic system, the space group is Ia-3d, and the broadband cyan luminescent material belongs to a garnet structure type compound; the structural formula is CaLu1-xHfGa2Al3O12: xCe < 3 + >, wherein x is more than or equal to 0.005 and less than or equal to 0.20. The preparation method comprises the following steps: weighing a Ca-containing compound, a Lu-containing compound, an Hf-containing compound, a Ga-containing compound, an Al-containing compound and a Ce-containing compound according to a stoichiometric ratio of a chemical expression, grinding and uniformly mixing to obtain a mixture; pre-sintering the mixture in air to obtain an intermediate product; and grinding and dispersing the intermediate product again, and carrying out secondary sintering in a reducing atmosphere to finally obtain the broadband cyan luminescent material. Compared with the prior art, the broadband cyan luminescent material disclosed by the invention can emit cyan light covering a 420-600nm light region under excitation of purple light.

The application discloses a preparation method of azirin analogs. The preparation method is as follows: taking 2-vinylaniline compounds as starting materials, directly irradiating under 350nm-380nm light, or taking 9-thioxanthone as a photocatalyst, irradiating under 380nm-410nm blue-violet light, and reacting the starting materials in an organic solvent to obtain azirin analogs through purification. The azirin analogs can be efficiently prepared in one step. The reaction condition is mild, the process is simple, the operation is convenient, the photocatalyst and the starting materials are cheap and easy to obtain, the obtained product can be used as a skeleton of a catalyst, and various new catalysts or ligands can be developed, which has important significance for the research and development of catalysts.

The present application relates to a kind of high thermal stability deep red fluorescent material, preparation method and LED light source.The fluorescent material is La2O3-MgO-A2O5-Sm2O3 system, wherein A is selected from one or more combinations of Nb, Ta or Sb;The molar ratio of La:Mg:A:Sm in the La2O3-MgO-A2O5-Sm2O3 system is (1.9-1.99):1:1:(0.01-0.1).Preparation method is: proportionally weigh La source compound, Mg source compound, A source compound and samarium source compound, grind and mix each raw material, then primary sintering is carried out, to obtain precursor;The precursor is secondly ground and mixed, then secondary sintering is carried out, to obtain the deep red fluorescent material.Compared with prior art, the deep red fluorescent material of the present application can effectively absorb 400-410nm wavelength violet light, and emit strong red light with center wavelength at 650nm, which can be well matched with violet chip to package and prepare LED light emitting device.

The invention belongs to the technical field of food packaging materials and bacteriostatic packaging films, and discloses an active packaging film capable of generating singlet oxygen bacteriostasis based on light driving, a preparation method and application of the active packaging film in fresh keeping of fruits, vegetables and edible mushrooms, and the active packaging film comprises the following steps: S1, obtaining a chitosan film solution A for later use; s2, obtaining a polyvinyl alcohol membrane solution B for later use; s3, obtaining a polyvinyl alcohol / chitosan composite membrane solution D based on food-grade nano silicon dioxide loaded sodium copper chlorophyllin; s4, preparing the bacteriostatic active packaging film, and using the bacteriostatic active packaging film in combination with blue-violet light. The antibacterial film disclosed by the invention has the advantages of high barrier property, ultraviolet-resistant optical property, strong and flexible mechanical property, good thermal stability, biodegradability and antibacterial property of CD-ROM movable product singlet oxygen (1O2). The packaging film can be used as a bio-based active package, can reduce the environmental pollution of a traditional petroleum-based packaging film, can prolong the shelf life of fruits, vegetables and edible mushrooms, and has the dual effects of environmental protection, bacteriostasis and preservation.

The application provides a Micro-LED display device and a manufacturing method thereof, wherein the Micro-LED display device comprises: a driving circuit unit, a plurality of pixel units arranged on the driving circuit unit, each pixel unit comprising: a light-emitting unit, the light-emitting unit being provided with three light-emitting structures through a partitioning channel, the three light-emitting structures being ultraviolet light-emitting structures or violet light-emitting structures, white light being obtained through fluorescent powder excitation, after passing through red, green and blue three primary color filters, combined control of a first electrode, a second electrode, a third electrode and a fourth electrode can realize red, green and blue three primary color single color control and color mixing control, the first electrode, the second electrode, the third electrode and the fourth electrode are arranged on the side of a backlight surface at the same time, the light-emitting area of an outlight surface can be increased, and the fourth electrode is connected with a transparent conductive layer through a partitioning channel, current expansion and electric conduction heat capacity can be obviously increased, and then the light-emitting efficiency and reliability of the Micro-LED display device are improved.

This invention provides a viscous flow-state carbazole-indole-based narrow-band blue-violet luminescent material, its preparation method, and its applications, belonging to the field of organic light-emitting materials. The viscous flow-state carbazole-indole-based blue-violet luminescent material prepared by this invention has a main blue-emitting framework obtained by connecting two phenyl groups at positions 2 and 10 of the carbazole-indole group, followed by flexible chain modification at positions 2 and 6 of the benzene group. Its core characteristic is that the molecule exhibits a viscous flow state and displays semiconductor properties. The luminescent material prepared by this invention has a regular molecular structure, good structural extensibility, good solubility, and excellent luminous efficiency, and can be used as a main luminescent material or a plasticized semiconductor molecule, thus showing great application prospects in the field of OLED displays.

This disclosure discloses an oral cavity observation instrument, relating to the field of dental examination technology. The specific implementation scheme is as follows: a chamber and a working surface are formed within the outer shell of the main body of the oral cavity observation instrument, with the working surface located on one surface of the chamber; it also includes a camera module and at least one light source; the at least one light source includes a violet light source; the camera module and the at least one light source are respectively disposed within the chamber at positions where they intersect with the working surface, the acquisition window of the camera module faces outwards from the chamber to ensure that the camera module can acquire images outside the chamber; the illumination direction of the at least one light source faces outwards from the chamber to ensure that the at least one light source can emit illumination light outwards from the chamber; a controller is also disposed within the chamber, the controller being used to suppress the original blue pixel information in the original tooth image acquired by the camera module under violet light illumination; and to regenerate a target tooth image based on the information of the original red and green pixels in the original tooth image.

This invention relates to a novel CdS quantum dot glass, its preparation method, and its application in a light source. The basic glass raw materials are composed of the following mass percentages: black talc powder: 55–70 wt.%; K₂CO₃: 5–15 wt.%; Li₂CO₃: 5–15 wt.%; SrCO₃: 5–10 wt.%; H₃BO₃: 5–20 wt.%; CdS: 1–15 wt.%; the content of the external rare earth compound is 0–2 wt.% of the total mass of the other raw materials (black talc powder + K₂CO₃ + Li₂CO₃ + SrCO₃ + H₃BO₃ + CdS); the content of the external clarifying agent is 0.2–2 wt.% of the total mass of the other raw materials (black talc powder + K₂CO₃ + Li₂CO₃ + SrCO₃ + H₃BO₃ + CdS). This invention relates to the field of glass materials technology. The raw materials used in its preparation are readily available, the process is simple, and it is easy to industrialize. The resulting CdS quantum dot glass can be effectively excited by 395nm violet light and has the characteristics of high luminous efficiency, excellent resistance to thermal quenching, and adjustable light color. The encapsulated white light source has the characteristics of warm white light output, high color rendering index, and high lumen efficiency.

This invention provides a class of short-wavelength light-converting materials based on benzoxazole, with the structure shown in Formula I, where R1 and R2 are each independently hydrogen atoms, C1-C18 straight-chain or branched alkyl groups; and R3 is an aryl group or a substituted aryl group. The short-wavelength light-converting material of this invention possesses advantages such as excellent short-wavelength ultraviolet light absorption, high luminous quantum efficiency, good photostability, low cost, and ease of mass production. When doped at a certain concentration into the encapsulating film of solar cells, it can efficiently absorb short-wavelength ultraviolet light to avoid UVID (ultraviolet-induced power degradation), and convert the absorbed short-wavelength ultraviolet light into long-wavelength ultraviolet or blue-violet light that can be efficiently utilized by solar cells, thereby increasing power generation. This is of great significance for improving the overall performance and economic benefits of photovoltaic modules.

The invention discloses purple light excited red oxynitride glass ceramic as well as a preparation method and application thereof, and belongs to the technical field of fluorescent glass ceramic. The crystal chemical general formula of the red-light oxynitride glass ceramic is Mg2Al4Si5 (ON) 18: Eu < 2 + >, the crystal structure belongs to a hexagonal crystal system, and the space group is P6 / mcc. According to the preparation method, the emission spectrum red shift of the Eu < 2 + > ion doped Mg2Al4Si5 (ON) 18 fluorescent material is induced through the regulation and control means of partial nitridation, the red light waveband coverage range is widened, the red light color purity is effectively improved, the preparation method of melting cooling and in-situ crystallization is adopted, the prepared material is an inorganic block material, the thermal stability and chemical stability of the material are improved, and the preparation method is suitable for industrial production. The material can be applied to the fields of white light LED devices, laser illumination display, plant illumination, optical medical treatment and the like.

The application discloses a light-emitting device, and relates to the technical field of illumination. The light-emitting device comprises a first infrared chip, a blue-violet light module, a second infrared chip, a containing element and a fluorescent layer. The blue-violet light module is used for generating a purple light beam and a blue light beam, and the first infrared chip and the second infrared chip are both used for generating an infrared light beam. The fluorescent layer performs a waveband adjusting operation on the purple light beam, the blue light beam and the infrared light beam, so as to adjust the wavelength of the outgoing light of the light-emitting device. After receiving a power supply signal, the first infrared chip, the blue-violet light module and the second infrared chip are all divided into voltages according to their internal impedances, so that the first infrared chip, the blue-violet light module and the second infrared chip all perform light-emitting operations under a rated voltage. The light-emitting device of the embodiment does not need to be provided with an additional voltage control circuit, so that the light-emitting chip can normally perform light-emitting operations, thereby reducing the production cost of the product.

Described herein are high energy ultraviolet (HEVL) absorbing benzotriazole vinyl monomers that have sufficient solubility in organic solvents (e.g., 1-propanol), have better compatibility with polymerizable components present in hydrogel lens formulations, and have absorption peaks at wavelengths of 410-425 nm. They are suitable for the manufacture of hydrogel contact lenses that can significantly block HEVL of 380-450 nm but cannot significantly block blue light (450-495 nm).

The application provides a traditional fluorescent aromatic phosphorus material with a pyrene imidazole structure. The material can ensure effective energy transmission, realizes simultaneous transmission of hole and electron carriers, is beneficial to design of a device and improvement of performance, can be used for preparing an ultra-low voltage driven high-efficiency traditional blue-violet light emitting device, has good thermodynamic stability, and significantly improves luminous efficiency and brightness of an organic electroluminescent material.

The invention relates to the technical field of pigments, in particular to a water-based formaldehyde-free painting pigment and a preparation method thereof. The method is realized by the following steps: firstly, grafting an initiator on the surface of amino mesoporous silica, and then grafting a zwitter-ion / hydrophobic copolymer brush on the surface of the amino mesoporous silica through purple light initiated polymerization; then preparing an acrylate pre-emulsion containing the functional nanoparticles, and carrying out semi-continuous emulsion polymerization to obtain a self-crosslinking emulsion; then introducing adipic dihydrazide as a latent cross-linking agent; and finally, adding functional nano-particles in multiple stages, mixing the functional nano-particles with pigments, auxiliaries and the like, and sanding and blending to obtain a final product. Formaldehyde is completely abandoned, a unique organic-inorganic composite structure and a latent cross-linking technology are utilized, the water resistance, scrubbing resistance, adhesive force and color stability of the pigment are synergistically improved, and meanwhile, the pigment has good environment-friendly safety and easy-to-clean performance and is particularly suitable for the fields of children painting and the like.

The invention relates to the technical field of intelligent detection, and particularly discloses an ice particle derusting surface cleanliness detection method based on purple light imaging and machine vision, which comprises the following steps: an image acquisition step: adopting a purple light imaging module to emit purple light of a specific wave band to a to-be-detected surface subjected to ice particle derusting treatment, collecting reflected light of the to-be-detected surface to form a surface image; and an image processing step: inputting the surface image to a machine vision processing module, and preprocessing the surface image by the machine vision processing module, including image denoising and contrast enhancement. By constructing an integrated detection system of purple light irradiation, high dynamic imaging, data processing and model prediction, non-contact detection of the cleanliness of the marine steel ice particle rust removal surface is realized, and secondary damage of contact detection to the rust removal surface is effectively avoided; and meanwhile, through targeted purple light wave band selection and image preprocessing, the microscopic characteristics of the ice particle derusting surface can be clearly captured.

This invention discloses a broadband luminescent material of nitrogen oxides, wherein the chemical composition of the full-spectrum luminescent material is M. 1‑ x Al a Si b O 7−b N a+2b−4 : x RE 2+ Wherein, M is selected from one or more of Ca, Sr, and Ba; RE is selected from at least two or more of Eu, Sm, and Yb; RE 2+ For luminescent central ions, 0.001 ≤ x ≤ 0.02. This invention also provides a preparation method for the target material, which is prepared through grinding, pre-calcination, calcination, and post-treatment steps. This luminescent material can be excited by a 365-420nm near-ultraviolet / violet light chip, and its emission spectrum covers 380-900nm, achieving broadband full-spectrum emission of blue-green-red light composites. It can effectively fill the cyan "gap" in the full spectrum and reduce the use of other commercial powders, and can be used as a fluorescence conversion material, showing great application potential in full-spectrum lighting and high-power laser lighting.

The utility model provides a purple light curing repairing suite suitable for a small-diameter pipeline. The purple light curing repairing suite comprises a guide head assembly, a steel wire armored rubber pipe, a rubber injection assembly, a display assembly and a propelling control assembly. The guide head assembly comprises a support, an annular brush surrounding the support, a glue outlet, an ultraviolet lamp and a camera, wherein the glue outlet, the ultraviolet lamp and the camera are integrated on the support. The diameter of the annular brush is matched with the pipe diameter. One end of the steel wire armored rubber tube is fixed to the tail end of the support, the other end of the steel wire armored rubber tube is connected with the output end of the propelling control assembly, and the propelling control assembly is used for controlling the steel wire armored rubber tube to rotate forwards or reversely and then controlling the whole guide head assembly to rotate forwards or reversely; a camera and an ultraviolet lamp in the guide head assembly are connected to the display assembly through a wire penetrating through the steel wire armored rubber pipe. A glue outlet in the guide head assembly is connected to the glue injection assembly through a glue injection pipe penetrating through the steel wire armored glue pipe; the display assembly and the wire are connected through a quick connector, and the glue injection pipe and the glue injection assembly are connected through a quick connector. The external member can meet the requirement for repairing the small pipe diameter.

An illumination device is an illumination device that illuminates an object containing a fluorescent brightener and includes a light emitter that emits white light including violet light whose light emission peak wavelength that excites the fluorescent brightener is less than or equal to 405 nm. A spectral reflectance ρ(λ) is expressed by an intensity EA(λ) / an intensity E(λ), where the intensity EA(λ) is an intensity of reflected light at a wavelength λ and the intensity E(λ) is an intensity of emitted light at a wavelength λ. The reflected light is light reflected off a surface of the object, and the emitted light is light emitted onto the surface of the object containing the fluorescent brightener. The maximum value of the spectral reflectance ρ(λ) at a wavelength λ ranging from 460 nm to 500 nm falls between 0.9 and 1.05, both inclusive.

Disclosed is an apparatus for disinfection comprising a cylindrical housing; a plurality of ultra-violet light emitting diode (UV-LED) modules disposed on the circumference of the cylindrical housing, each UV-LED module comprising a heat sink; and a heat dissipation module disposed along the central axis of the cylindrical housing, the heat dissipation module arranged in thermal contact with the heat sink of each of the plurality of UV-LED modules; wherein each of the plurality of UV-LED modules is pivotably mounted onto the circumference.