30results about How to "Improve scattering efficiency" patented technology

The invention relates to electrophoretic displays comprising core-shell pigment particles having a core of low specific gravity and low refractive index and a shell of high refractive index.

In one aspect, the invention provides a titanium dioxide pigment. The titanium dioxide pigment comprises a plurality of titanium dioxide particles, and a polymer deposited on the titanium dioxide particles for inhibiting agglomeration of the titanium dioxide particles in an aqueous based coating formulation. The titanium dioxide particles have anchoring moieties associated therewith for facilitating anchoring of the polymer to the particles. The polymer is a copolymer having anchoring groups for attaching to the anchoring moieties associated with the titanium dioxide particles and hydrophobic end groups for attaching to the resin of the coating formulation. In another aspect, the invention provides a method of manufacturing a titanium dioxide pigment.

The present invention discloses a light source scattering illumination device for a detecting system. The device comprises a reflection cover body, a Teflon scattering layer and at least one luminous device. The reflection cover body is provided with a slotted hole. The Teflon (PTFE) scattering layer is arranged on the inner wall of the reflection cover body. The at least one luminous device is arranged inside the reflection cover body. The luminous device is further provided with a plurality of luminous bodies which are arranged in the form of arrays to provide a light source. With the Teflon scattering layer in the present invention, perfect scattering efficiency can be provided and uniform scattered light can be generated. Through selecting high power light emitting diodes as a luminous source, the luminous device also can provide perfect light strength so that the light source scattering device can generate high brightness and the uniform scattered light to solve the problem that the detecting system is insufficient in illumination strength.

The invention discloses a microwave signal generating device and method of a photoelectric oscillator based on a liquid-core optical fiber Brillouin scattering effect.The microwave signal generating device includes a Brillouin scattering pump laser, an isolator, a modulator, a liquid-core optical fiber, a signal laser, a first circulator, a third laser, a second ring, a polarization beam splitter, a first optical fiber, a second optical fiber, a first polarization controller, a second polarization controller, a polarization beam combiner, a photoelectric detector, a coupler and a power amplifier.The device and the method can not only produce high-frequency microwave signals and can also obtain tunable microwave signals wider in tuning range.

The invention includes sensors and sensing methods for determining cell morphology and/or chemical composition of an analyte. A porous substrate exhibiting a first optical signal is exposed to a target analyte and subsequently monitored for changes in the optical signal. More specifically, a photonic or porous substrate having a well-defined and highly tunable reflectivity or transmission spectrum, such as porous silicon (Si), porous alumina, porous Ge, porous GaAs, porous SiO2 and porous polymer, is used for example. A porous or photonic substrate is exposed to an analyte, such as a cell or other macromolecule, and changes in the scattered light are observed over time to determine cell morphology and/or chemical composition of the analyte using the substrate.

The invention discloses a self-stimulated Raman scattering laser of an In-Band pump, which comprises a laser pump source, a laser energy transfer optical fiber, a first planoconvex lens for collimation, a second planoconvex lens for focusing, a reflection mirror of a resonator cavity, a laser gain dielectric crystal, a laser output mirror and a laser collimating mirror which are sequentially arranged, wherein pump light outputted by the laser pump source is transmitted to the first planoconvex lens via the laser energy transfer optical fiber, collimated by the first planoconvex lens, focused by the second planoconvex lens and further focused on the end surface of the laser gain dielectric crystal, the laser gain dielectric crystal produces stimulated radiation after absorbing the pump light, when the radiation of fundamental frequency light in the resonator cavity exceeds the self-stimulated Raman scattering threshold of the laser gain dielectric crystal, the produced Raman laser is collimated and outputted by the laser collimating mirror. The self-stimulated Raman scattering laser can improve the self-stimulated Raman scattering conversion rate, eliminate the thermal relaxation process from the pump energy level to the laser energy level of electrons of the conventional pump way, improve the quantum efficiency, reduce the heat and increase the self-stimulated Raman scattering conversion rate.

The invention discloses a directly-pumping self-stimulated Raman scattering human eye safe waveband laser. The laser comprises a laser pumping source, a laser energy transmission fiber, a plano-convex lens collimator, a plano-convex focus lens, a cavity reflector, a laser gain medium crystal, a laser output mirror and a laser collimating lens, wherein pumping light output by the laser pumping source is transmitted to the plano-convex lens collimator through the laser energy transmission fiber; after being collimated, the pumping light is focused on the end face of the laser gain medium crystal through the plano-convex focus lens; the laser gain medium crystal absorbs the pumping light and generates stimulated radiation with a waveband of 1.3 microns; and when the radiation with the waveband of 1.3 microns surpasses a self-stimulated Raman scattering threshold value of the laser gain medium crystal, generated human eye safe waveband laser with the waveband of 1.5 microns is collimated and output by the output mirror. The laser has the advantages of enhancing self-stimulated Raman scattering conversion rate in the waveband of Nd3+1.3 microns, eliminating thermal relaxation process of electronics from a pumping energy grade to a laser energy grade in a conventional pumping mode, enhancing quantum efficiency and reducing heat.

This invention relates to the field of biological assays where cells can be classified and enumerated using flow cytometry optical instrumentation. The invention combines information from multi-angle, light scatter from the cell itself and multi-angle light scatter from small, optically resonant particles that are selectively bound to surface molecules on the cell to carry out classification and enumeration. This light scatter method enables an instrumentation system that is simple to use, inexpensive to build, and mechanically robust; making it suitable for use in remote clinical environments.

The invention discloses metamaterial spunbond cloth and a preparation method thereof. The metamaterial spunbond cloth comprises at least one single-layer fiber spunbond layer; the single-layer fiber spunbond layer comprises metamaterial fibers; the metamaterial fibers are interwoven and overlapped to form pores; in the pores, the pores with the diameter being 100-3000 nm are reflection pores, and the total volume of the reflection pores accounts for 10%-90% of the volume of the spunbond cloth; the metamaterial fibers are formed by a composite material comprising a polymer substrate material and micro-nano particles; and the average particle size of the micro-nano particles is 100-3000 nm. The metamaterial fibers are arranged in an interwoven mode and the micro-nano particles in the fibers are arranged randomly, the spunbond cloth with the metamaterial characteristics is formed, ultra-wideband optical responses of 0.3-2.5 micrometers and 8-13 micrometers are generated based on the photonic design, then solar radiation and human infrared heat radiation are guided and controlled, and photo-thermal regulation and control are carried out on the microenvironment temperature of the cloth and the human skin to realize efficient thermal management.

An optical measurement of a crystalline sample to be measured. The sample is irradiated with an exciting light from the polarization direction in which the Raman scattering is prohibited by the selection rule. When a metal probe is brought to proximity to the sample to be measured, the selection rule is eased locally only in the proximity portion near the probe end in order that Raman scattering becomes active. Thus, a Raman signal only from the proximity portion near the probe end is detected. An optical measurement apparatus having an optical arrangement for measuring a signal light re-emitted from a sample to be measured when the sample is irradiated with an exciting light is provided. The optical measurement apparatus comprises a means for limiting the polarization state of the exciting light or signal light and a means for bringing a metal probe near the sample to be measured. The optical measurement apparatus is used to measure the signal light obtained by locally easing the limitation on the polarization state by bringing the metal probe near the sample. Therefore, Raman scattering light from silicon or the like can be measured with high space-resolution exceeding the light diffraction limit.

A liquid crystal display device includes a liquid crystal layer 1 whose state is switchable between a light-transmitting state and a light-scattering state, a front substrate 3 and a rear substrate 2 between which the liquid crystal layer 1 is held, a pair of electrodes 4, 8 between which the liquid crystal layer 1 is interposed and which are configured to apply a voltage across the liquid crystal layer 1, and first and second alignment films 13, 12 respectively provided between the liquid crystal layer 1 and the front substrate 3 and between the liquid crystal layer 1 and the rear substrate 2. The liquid crystal layer 1 includes, in each of the pixels, a continuous wall 10, a plurality of small sections 14 separated by the wall 10, and a plurality of liquid crystal regions 11, each of which is formed in any one of the plurality of small sections 14. The plurality of liquid crystal regions 11 include first and second liquid crystal regions 11 which have directors 20 in a plane parallel to the liquid crystal layer 1. The directors 20 of the first and second liquid crystal regions 11 are oriented in different directions.

A backlight module includes a light guide plate, a plurality of light transmission elements and a light source. The light guide plate has at least one light incident surface, and the light transmission elements are disposed near the light incident surface and aligned to from at least one light transmission element row. The light source is disposed near one end of the light transmission element row and capable of emitting a light beam to the light transmission element row. Each of the light transmission elements reflects a part of the light beam to the light guide plate to form multiple independent light reflection paths, and the light transmission elements successively transmits a part of the light beam to form a light transmission path in the light transmission element row.

The invention discloses an LED fluorescent lamp with a large light emitting angle, and belongs to the technical field of LED illumination lamps. The LED fluorescent lamp comprises an optically designed lamp cover, and a lamp holder with a circularly arched cross section, wherein the lamp cover and the lamp holder are buckled to take a cylindrical shape; a lamp tube inner hole forms an accommodating space; an aluminum baseplate clamping groove, a bar-shaped aluminum baseplate, a light emitting module, a barb, a lamp cover clamping groove and a heat dissipating aluminum piece are arranged in the accommodating space; the splayed heat dissipating aluminum piece is connected to the two ends of the aluminum baseplate clamping groove; the aluminum baseplate clamping groove and the heat dissipating aluminum piece are connected as an integrated structure; the inclination of the heat dissipating aluminum piece is within 180-240 degrees; and the radian of the lamp cover is larger than the radian of the lamp holder. Light rays are fully reflected and diffused through the specially designed lamp cover, so that the light emitting rate reaches 94%; the light emitting angle reaches 180-240 degrees through the heat dissipating aluminum piece with adjustable inclination angle; and the LED fluorescent lamp with the large light emitting angle improves the scattering efficiency, increases the light emitting angle of the light rays, reduces the irradiation dead angle, and enhances the light emitting strength and uniformity of the lamp cover.

The application discloses a passive tag which comprises a copper-clad substrate, an antenna and a dielectric slab, wherein the antenna and the dielectric slab are all positioned on the copper-clad substrate; the antenna comprises an antenna upper arm and an antenna lower arm; the antenna upper arm and the antenna lower arm are positioned on the same straight line; a gap is formed between the antenna upper arm and the antenna lower arm; a plurality of metal wires which are parallel to each other and between two of which a gap is formed are arranged on the dielectric slab; the extending direction of the metal wire is parallel to the antenna upper arm and the antenna lower arm; and the separated end parts of the antenna upper arm and the antenna lower arm are respectively connected with two ends of a metal wire in the plurality of metal wires. The passive tag does not have a working threshold, is long in communication distance, safe, reliable, small in size, convenient to process, low in cost and convenient to popularize and use, wherein the cost of a reader-writer can be reduced obviously.

The invention relates to the related technical field of lawn lamps, and discloses a lawn lamp for expelling insects by using light scattering. The lawn lamp comprises a mounting base, a liquid injection lamp shell capable of being filled with liquid is fixedly mounted on the mounting base, the liquid injection lamp shell is filled with water to improve the lighting effect and cooperatively realize the light scattering insect expelling effect, a light sensation lifting device is fixedly installed in the liquid injection lamp shell, and the light sensation lifting device comprises a function carrying body. According to the lawn lamp capable of expelling insects through light scattering, the light scattering principle is applied, common pests such as mosquitoes and flies in gardens have the unified characteristic of compound eye insects, and when the scattering illumination cavity filled with waterworks without illumination in the daytime, the light scattering effect can be achieved through cooperation of metal sheets in the cavity and liquid water, so that the effect of dispersing the compound eye insects can be achieved.