8 results about "Near ultraviolet" patented technology

LED devices and methods of operating them are described. An LED lighting device includes a substrate (702), a white LED (402) on the substrate at a location configured for alignment with an optical axis of an automotive lamp when installed, and a near ultraviolet LED (404) on the substrate at a location spaced apart from the white LED by an amount such that the near ultraviolet LED is defocused from the optical axis of the automotive lamp when installed such that the near ultraviolet LED emits energy in the near ultraviolet band in a larger area than the white LED when powered on.

The application discloses a kind of by multi-phase Eu 2+ And charge compensation agent doped blue cyan fluorescent powder and its preparation method, belong to fluorescent powder technical field, by multi-phase Eu 2+ And charge compensation agent doped blue cyan fluorescent powder molar ratio general formula is: KAlSi3O8:3mol%Eu 2+ :Xmol%M + , and 1.0≤x≤11.0, wherein M + It is selected from Li + , Na + , Rb + , Cs + Four charge compensation ions, and the ionic radius of M + With K + There is controllable difference.Benefiting from the unique structural design, the prepared fluorescent powder can emit adjustable strong blue cyan light under near ultraviolet-blue light excitation, and the luminescence thermal quenching performance, quantum efficiency and spectral stability are all significantly improved.The fluorescent powder is applied to white light LED device packaging, and the efficient and wide-spectrum blue cyan emission and cyan spectral component can be used.Only by matching with a blue light chip and a single yellow / red fluorescent powder, high-quality full-spectrum white light with high color rendering index can be realized under the conditions of simplifying packaging process and reducing cost, and the fluorescent powder shows important application prospects in the fields of healthy lighting, high-end display and precise spectral design.

An amine compound according to the present invention has a benzazole ring structure represented by general formula (a). The amine compound exhibits excellent stability and durability in thin films, and can provide, through optimization of the molecular design, a material in which the refractive index of visible light is high and the extinction coefficient of light near ultraviolet light is high. By using the compound in a material constituting a capping layer, an organic EL element that has excellent luminous efficiency can be obtained. R1-R4 each represent H, an aryl group, or a heteroaryl group, where at least one of these represents an aryl group or a heteroaryl group. L1-L3 each represent a divalent group such as a phenylene group, X1-X3 each represent O or S, and Y1 and Y2 each represent N or a methine group.

This invention discloses a Sham lens and electronic device for near-ultraviolet point light source detection. The lens comprises twelve lenses arranged sequentially along an optical axis from the object side to the image side, all of which are spherical lenses. Specifically, the first lens has positive refractive index, with a planar object side and a convex image side; the second lens has positive refractive index, with a convex object side and a concave image side; the third lens has positive refractive index, with a convex object side and a concave image side; the fourth lens has positive refractive index, with a convex object side and a concave image side, and so on. This optical system, through a series of targeted designs including a global surface design, high relative illumination, optimized structural compactness and back focal space, precise matching of the Sham angle, fixed magnification, and compatibility with large-area sensors, achieves significant improvements in imaging performance, system stability, integration convenience, and operational efficiency, meeting the needs of modern high-precision machine vision applications.

This invention relates to the field of empty can sterilization technology and discloses an empty can sterilization device for milk powder production. The device includes a main frame, a protective cover fixedly connected to the end face of the main frame, a conveyor belt rotatably connected to the inner wall of the main frame, an ultraviolet lamp installed on the inner wall of the protective cover away from the conveyor belt, a front frame snapped onto the surface of the main frame near the ultraviolet lamp, and a rear frame inserted into the surface of the main frame away from the front frame. A conveyor control plate is fixedly connected to the inner wall of the front frame. In use, the empty can to be ultraviolet sterilized is placed on the conveyor rod. At this time, the conveyor control plate in the alignment component controls the rotation of the conveyor rod, starting to move the empty can. Simultaneously, the conveyor control plate controls the output pin to rotate along the inner wall of the conical plate seat. When the output pin rotates, it drives the alignment hammer to rotate, which adjusts the empty can on the surface of the conveyor rod, allowing the empty can to stand upright with its opening facing upwards.

This invention discloses a method and apparatus for fabricating deep ultraviolet optical thin films based on a stress-compensating superlattice structure, comprising: (1) Stress-compensating superlattice unit (SSC-Unit) design: periodically inserting SSC-Units into deep ultraviolet high-reflectivity or anti-reflectivity film systems, each SSC-Unit consisting of compressive stress material and tensile stress material; (2) Dynamic ion energy modulation deposition: using ion beam sputtering (IBS) deposition technology, the change in substrate curvature radius is measured in real time through a multi-beam laser curvature monitoring system, and the instantaneous stress is calculated based on the Stoney formula. When the stress deviates from the ±20MPa threshold, the ion energy or SSC-Unit insertion frequency is automatically adjusted. This invention has significant stress self-compensation effect, excellent optical performance, and enhanced process robustness. It is not only applicable to the 193nm band, but can also be extended to other deep ultraviolet and near ultraviolet bands such as 248nm and 266nm.

The application discloses a middle-near ultraviolet-to-visible light wide-waveband anti-reflection film layer and a lens, the film layer is arranged on a concave surface of the lens, the film layer comprises a multilayer structure which is stacked in sequence from the concave surface of the lens outwards, and the first layer to the fifth layer of the multilayer structure are a first low-refractive silicon material layer, a second middle-refractive zirconium-titanium material mixed material layer, a third low-refractive silicon material layer, a fourth middle-refractive zirconium material layer and a fifth low-refractive silicon material layer in sequence. Benefited from the second middle-refractive zirconium-titanium material mixed material layer, the film layer can reduce the reflectivity of visible light while reducing the reflectivity of ultraviolet light, and truly realizes the middle-near ultraviolet-to-visible light wide-waveband anti-reflection. The lens covered with the film layer can prevent the secondary reflection of ultraviolet light from entering the eyes, avoid damaging the eyes, improve visual comfort and reduce glare at the same time, and plays an effective role in protecting the eyes.

The application relates to a kind of ultraviolet / violet excitation blue fluorescent material and its preparation method and application.It is Eu 2+ Doped oxide-based blue fluorescent material, chemical formula is BaHfSi2O7:xEu 2+ Wherein, 0.003<=x<=0.02.Compared with the prior art, the violet excitation blue fluorescent material provided by the application is a kind of new, never reported ultraviolet excitation 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, the fluorescent material emits blue light with the center wavelength located at 472nm under the excitation of 304nm near ultraviolet light, and simultaneously has excellent stability and luminous efficiency.The fluorescent powder can be prepared by conventional solid-phase reaction method, has the characteristics of simple preparation process and easy industrial production, can be combined with near-ultraviolet chip to produce white light, can be widely used as a good candidate material for white LED, and can meet the urgent needs of current healthy lighting LED light source.