204 results about "Violet light" patented technology

The invention provides a light generating system (1000) configured to generate system light (1001) having a spectral power distribution with spectral intensity at a plurality of wavelengths within the wavelength range of 380-780 nm, wherein relative to a total radiant flux of the system light (1001) in the 380-780 nm wavelength range, 15-40% of the total radiant flux is within the 385-440 nm wavelength range, and 60-85% of the total radiant flux is within the 440-780 nm wavelength range, and wherein the system light (1001) has an R9 value of at maximum 85, and a color rendering index selected from the range of 55-85.

The invention provides antireflection eye protection functional paper and a preparation method thereof. According to the preparation method, the coating with specific content components is adopted and matched with specific process steps, overall good interaction is achieved, compared with coated base paper, the diffuse reflection rates of the prepared anti-reflection eye-protecting functional paper are reduced by 10.07% at 315 nm and 6.77% at 400 nm respectively in a harmful blue-violet light area (400-480 nm) and an ultraviolet light area (especially UVA with the wavelength range of 315-400 nm), and the anti-reflection eye-protecting functional paper has the beneficial effects that the anti-reflection eye-protecting functional paper is good in anti-reflection effect and good in anti-reflection effect. The damage of harmful light to the retina of human eyes can be effectively reduced, and the effects of preventing myopia and protecting eyes are achieved; meanwhile, compared with coated raw paper, the reflectivity of the anti-reflection type eye protection functional paper is increased by 0.2% on the contrary within the 500-700 nm wave band comfortable for human eye reading, and the reading experience feeling of readers is further guaranteed.

Provided in the present application is a preparation method for a silk fibroin hydrogel. The preparation method comprises the following steps: adding natural silk to a sodium carbonate solution, and heating the solution to obtain degummed natural silk; dissolving the degummed natural silk in a lithium bromide solution, and adding glycidyl methacrylate thereto to perform a reaction, so as to obtain a reaction solution; dialyzing the reaction solution to obtain a supernate; freeze-drying the supernate to obtain a freeze-dried protein; and mixing an antibacterial agent solution with a photoinitiator solution, adding the freeze-dried protein thereto, and irradiating same with blue-violet light to obtain a silk fibroin hydrogel. In the present application, glycidyl methacrylate is used to modify the degummed natural silk (fibroin); and an antibacterial agent and a photoinitiator are added in the hydrogel-forming step, and irradiation is performed with blue-violet light to subject the modified fibroin to curing crosslinking, thereby preparing a silk fibroin hydrogel having antibacterial performance, which hydrogel can be widely used in the fields of biomedical materials, etc. The preparation method of the present application is simple and fast, and has a high hydrogel-forming speed.

The present invention relates to the technical field of wastewater treatment, and discloses a medical wastewater disinfection treatment system, which comprises a disinfection tank, and further comprises: a disturbance assembly, which is used for stirring wastewater in the disinfection tank to make the wastewater present a vortex shape; the ultraviolet lamp is arranged in the disinfection tank and located at the axis position of the disinfection tank, and an ultraviolet irradiation area is formed above the center of a formed vortex; the at least two liquid discharge pipes are connected to the outer wall of the disinfection tank, the two liquid discharge pipes are vertically distributed, the horizontal height of each liquid discharge pipe is higher than that of the ultraviolet lamp, and an electromagnetic valve is mounted at a water inlet of each liquid discharge pipe. By controlling the opening height of the liquid discharge pipe and the stirring amplitude of the disturbance assembly, wastewater with different depths and colors can be subjected to irradiation disinfection treatment, the penetrating power of ultraviolet rays is ensured, and the disinfection effect on pathogens in the wastewater is improved.

The present invention provides a method of treating Parkinson's disease by light stimulation in which light of a specific wavelength such as violet light is irradiated at a specific blinking frequency. The present invention, by irradiating light of a specific wavelength such as violet light to a living body, carries out treatment and / or prophylaxis of Parkinson's disease by improving or suppressing at least one symptom selected from a group of symptoms consisting of cognitive memory disorder, working memory disorder, dysphoria, anxiety, apathy, psychological symptoms (hallucination, visual hallucination, and auditory hallucination), impulse control disorder, orthostatic hypotension, urinary disorder, sexual dysfunction, digestive symptoms (drooling, swallowing, nausea, constipation), sleep disorder, pain, weight loss, olfactory abnormality, fatigue, and diaphoresis.

The invention discloses a laser radar ranging and imaging system and method. The system comprises a dual-wavelength laser emission module, a common-path optical transceiver module and a light-splitting-free detection module. The common-optical-path optical transceiver module is used for combining the purple laser pulse and the near-infrared laser pulse into a coaxial laser beam, guiding the coaxial laser beam to a target, receiving an echo optical signal which is returned from the target and comprises the purple laser pulse and the near-infrared laser pulse, and integrally exporting the echo optical signal; the light-splitting-free detection module comprises a gallium nitride photoelectric detector, a silicon photomultiplier detector and a signal processor. The underwater echo and the water surface echo are directly separated from each other on the physical level by using the dual-function characteristics of purple light absorption and infrared transmission of the gallium nitride detector. According to the design, sounding errors caused by signal aliasing of a traditional single-wavelength system are fundamentally eliminated, and the measurement precision is remarkably improved.

The invention relates to the technical field of light-emitting devices, in particular to a blue-violet light LED device containing a perovskite material, which comprises an ITO anode, a hole transport layer, a perovskite layer, an electron transport layer, an electron injection layer and a cathode material layer which are sequentially overlapped, the perovskite layer is a quasi-two-dimensional / three-dimensional heterojunction perovskite material and comprises a three-dimensional perovskite material and a quasi-two-dimensional layered structure material wrapping the surface of the three-dimensional perovskite material, the molecular formula of the three-dimensional perovskite material is Cs3Bi2Cl6Br3, and the molecular formula of the quasi-two-dimensional layered structure material is (4-F-PEA) 2PbCl4. The quasi-two-dimensional / three-dimensional heterojunction perovskite material is a blue-violet light perovskite material with high stability, high blue-violet light emission efficiency and high color purity, and is beneficial to improving the light-emitting color purity, the light-emitting efficiency and the environmental tolerance of a blue-violet light LED device and improving the performance of the blue-violet light LED device.

A source of light energy such as a source of violet light energy is coupled to a structure configured to contact the eye. The light source and structure are arranged to provide therapeutic amounts of violet light energy to the eye in order to inhibit the progression of refractive error such as myopia. The light source can be configured in many ways and may comprise a radioisotope and a phosphorescent material. The structure configured to contact the eye may comprise a contact lens or an implant.

The invention provides a preparation method of a polarization body holographic device and the polarization body holographic device. The method comprises the following steps: providing a substrate layer; coating a light orientation layer on the substrate layer, and carrying out polarization exposure treatment on the light orientation layer; coating a liquid crystal material on the photo-alignment layer subjected to the polarization exposure treatment, and carrying out photo-alignment and curing treatment on the liquid crystal to form a liquid crystal layer; the surface of the side, away from the substrate layer, of the liquid crystal layer is coated with a bonding layer, and a device layer is attached to the bonding layer; and removing the substrate layer and the light orientation layer to obtain the polarization body holographic device. When the polarization body holographic device is prepared, the light orientation layer and the substrate layer are removed, the problems that the polarization body holographic device becomes yellow and absorbs blue-violet light due to the existence of the light orientation layer and the substrate layer are solved, and the optical performance of the polarization body holographic device is improved.

A purpose of the present invention is to provide a method of treatment of a disorder by light stimulation in which light of a specific wavelength such as violet light is irradiated at a specific blinking frequency, and an apparatus used for the same. The present invention treats and / or prevents a disorder by promoting survival, proliferation, and differentiation of oligodendrocyte precursor cells or oligodendrocytes, regenerating or increasing myelin, activating nerves, and activating immunity by irradiating light of a specific wavelength such as violet light to a living body.

The invention relates to an ultraviolet / purple light excited blue fluorescent material as well as a preparation method and application thereof. The Eu < 2 + > doped oxide-based blue fluorescent material has a chemical expression of BaHfSi2O7: xEu < 2 + >, and x is more than or equal to 0.003 and less than or equal to 0.02. Compared with the prior art, the purple-light-excited blue fluorescent material provided by the invention is brand-new and unreported ultraviolet-excited Eu < 2 + >-doped oxide-based 472nm blue-light-emitting fluorescent powder, the fluorescent powder has a wide excitation band, the excitation spectrum range covers 200-450nm, the emission spectrum range covers 390-680nm, and the fluorescent material has a good fluorescent effect under the excitation of 304nm near ultraviolet light. The blue light with the central wavelength of 472nm is emitted, and meanwhile, the blue light emitting material has excellent stability and luminous efficiency. The fluorescent powder can be prepared by adopting a conventional solid-phase reaction method, has the characteristics of simple preparation process and facilitation of industrial production, can be combined with a near ultraviolet chip to generate white light, can be used as a good candidate material for wide application of a white light LED, and can meet the urgent demand of a current healthy illumination LED light source.

The application provides an optical glass and a preparation method thereof. The optical glass contains the following components in terms of mole percentage: SiO2: 13-25%; B2O3: 8-17%; Al2O3: 0-6%; BN: 0.1-8%; La2O3: 20-30%; Y2O3: 0-5%; Nb2O5: 2-8%; TiO2: 20-30%; ZrO2: 3-9%; ZnO: 0-5%; the refractive index of the optical glass is 1.99-2.05, and the Abbe number is 26-32. The optical glass has low cost, and is further beneficial to reducing the cost of an optical system. The optical glass has excellent performance, and is beneficial to improving the transmittance of the optical system in the violet light band.

The invention relates to a purple light-excited cyan light-emitting fluorescent material as well as a preparation method and application thereof. The cyan light emitting fluorescent material is a Ce < 3 + > doped oxide cyan light emitting fluorescent material, the chemical expression of the cyan light emitting fluorescent material is SrCa0. 7Mg0. 3Lu4-xO8: xCe < 3 + >, and x is more than or equal to 0.003 and less than or equal to 0.05. The preparation method comprises the following steps: weighing a strontium source compound, a calcium source compound, a magnesium source compound, a lutetium source compound and a cerium source compound according to a stoichiometric ratio of a chemical expression of the green light emitting fluorescent material, grinding and uniformly mixing to obtain a mixture; sintering the mixture at high temperature, and cooling to obtain the purple light excited cyan fluorescent material. Compared with the prior art, the method has the advantages of optimizing the crystal field environment, constructing a cyan fluorescent material with wide-spectrum excitation characteristic, high luminous efficiency and excellent thermal stability and the like.

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.

A backlight for a display for emitting at least first and second emitted light, said backlight comprising a violet LED for emitting violet light, a cyan LED for emitting cyan light, red QDs (RQDs) for emitting red light, green QDs (GQDs) for emitting green light, a driver configured at least for driving said violet LED in a first mode, and driving said cyan LED in a second mode, wherein in said first mode, said violet LED is driven to emit said violet light, a portion of which is absorbed by said RQDs and said GQDs to emit said red light and green light respectively, said cyan LED is driven to emit said cyan light, a portion of which is absorbed by said RQDs and said SGQDs to emit said red light and short green light respectively.

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 invention belongs to the technical field of microcrystalline glass materials, and particularly discloses rare earth doped silicate system high-crystallinity transparent microcrystalline glass and a preparation method thereof. The microcrystalline glass is prepared from the following raw materials: black talcum powder, CaO, AlF3, YF3, rare earth ions, graphite powder, Si3N4, a clarifying agent, micron-sized seed crystals and the like through a high-temperature melting process and controllable nucleation-crystallization. The preparation method is simple, the used raw materials are rich, the preparation process is simple, and the prepared high-crystallinity transparent microcrystalline glass can be effectively excited by 420 nm purple light and has the characteristics of high crystallinity, high transmittance, high luminous efficiency, excellent thermal quenching resistance and the like. A main crystal phase is CaAl2Si2O8 and a small amount of YF3, the crystallinity is larger than or equal to 70 vol.%, the transmittance of a 1 mm sample is larger than or equal to 80%, the emission peak value is adjustable between 480 nm and 520 nm, the internal quantum efficiency is larger than or equal to 80%, the luminous intensity at the temperature of 150 DEG C is 85% or above of the luminous intensity at the room temperature, and the material can be widely applied to the fields of white light illumination, screen display and the like.

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.

Described herein is a cost-effective and time-efficient method for producing photochromic contact lenses, in particular, preferably photochromic silicone hydrogel contact lenses, from a polymerizable composition comprising an unique selection and combination of main polymerizable components, a photochromic compound and a visible-light photoinitiator, based on the Lightstream Technology™. This invention also provides photochromic contact lenses or more preferably photochromic silicone hydrogel contact lenses made according to a method of the invention. A photochromic contact lens of the invention is capable of undergoing a reversible color change upon exposure to UV-irradiation or high-energy-violet light (HEVL) (with wavelengths from 380 nm to 440 nm).

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.

A sub-wavelength grating optical film comprises a plurality of one-dimensional periodic grating units repeatedly arranged side by side. Each grating unit with a period of p comprises a first medium, a second medium, a third material, a fourth material, a fifth material, a sixth medium and a seventh medium, wherein the sixth medium serving as a substrate and the seventh medium serving as a covering layer are respectively arranged on bottom and top of each grating unit periodically arranged side by side. By controlling grating period and refractive index, incident blue-violet light meets condition that a diffraction angle in a layer with highest refractive index is smaller than 90 degrees; and by adjusting duty ratio of the grating and the thickness of each layer of material, transmitted light energy of the blue-violet light wave band is the lowest so that harmful blue-violet light is isolated.

To provide a favorable method and apparatus for treating refractive error of an eye.SOLUTION: A source of light energy such as a source of violet light energy is coupled to a structure configured to contact an eye. The light source and structure are arranged to provide therapeutic amounts of violet light energy to the eye in order to inhibit progression of refractive error such as myopia. The light source can be configured in many ways and may comprise a radioisotope and a phosphorescent material. The structure configured to contact the eye may comprise a contact lens or an implant.SELECTED DRAWING: Figure 1A

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.

The invention relates to high-purple-light-absorption yellow fluorescent powder as well as a preparation method and application thereof, the chemical expression of the high-purple-light-absorption yellow fluorescent powder is (CaSrBa) 2-xSiO4: xEu < 2 + >, and x is more than or equal to 0.01 and less than or equal to 0.5. The preparation method comprises the following steps: (1) weighing a Ca-containing compound, a Sr-containing compound, a Ba-containing compound, a Si-containing compound and an Eu-containing compound according to a stoichiometric ratio, grinding and uniformly mixing, and placing in a crucible; (2) calcining the powder obtained in the step (1) in an air atmosphere, and cooling to obtain a precursor; and (3) uniformly grinding the precursor synthesized in the step (2) again, sintering in a reducing atmosphere, and cooling to obtain the purple light high-absorption yellow fluorescent powder. Compared with the prior art, the yellow fluorescent powder covers a wider emission spectrum range, and the prepared yellow fluorescent powder is stable in physical and chemical performance and can be combined with a purple light chip to prepare a glare-free LED (light-emitting diode).

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.