182 results about "Secondary emission" patented technology

A high efficiency light emitting diode (LED) comprised of a substrate, a buffer layer grown on the substrate (if such a layer is needed), a first active region comprising primary emitting species (PES) that are electrically-injected, a second active region comprising secondary emitting species (SES) that are optically-pumped by the light emitted from the PES, and photonic crystals, wherein the photonic crystals act as diffraction gratings to provide high light extraction efficiency, to provide efficient excitation of the SES, and/or to modulate the far-field emission pattern.

A system and method to broadcast an optical signal through an amorphous medium, including a primary emitter capable of producing a primary optical signal during at least one broadcast period and capable of transmitting the primary optical signal through the amorphous medium. A secondary emitter, separate from the primary emitter and in operation during at least a portion of the broadcast period, produces a secondary emission detectable by a detector during the broadcast period. A signal entrainment controller, in communication with the primary emitter and the secondary emitter, synchronizes the secondary emitter with the primary emitter to generate a resultant signal of higher intensity than the primary signal by itself.

A multilayer structure for sustained conversion of a primary electromagnetic radiation into another electromagnetic radiation characterized by a spectrum of a higher average wavelength is disclosed. Also disclosed are methods of creating and using the inventive multilayer structure.

The present invention provides systems, devices, device components and structures for modulating the intensity and/or energies of electrons, including a beam of incident electrons. In some embodiments, for example, the present invention provides nano-structured semiconductor membrane structures capable of generating secondary electron emission. Nano-structured semiconductor membranes of this aspect of the present invention include membranes having an array of nanopillar structures capable of providing electron emission for amplification, filtering and/or detection of incident radiation, for example secondary electron emission and/or field emission. Nano-structured semiconductor membranes of the present invention are useful as converters wherein interaction of incident primary electrons and nanopillars of the nanopillar array generates secondary emission. Nano-structured semiconductor membranes of this aspect of the present invention are also useful as directed charge amplifiers wherein secondary emission from a nanopillar array provides gain functionality for increasing the intensity of radiation comprising incident electrons.

An arrangement (10) for efficiently shifting energy received at a first wavelength and outputting the shifted energy at a second wavelength. The arrangement (10) includes a laser (12) and an optical parametric oscillator (14) of unique design. The oscillator (14) is constructed with a energy shifting crystal (20) and first and second reflective elements (16) and (18) disposed on either side thereof. Light from the laser (12) at a fundament frequency is shifted by the crystal and output at a second wavelength. The second wavelength is a primary emission and induces a secondary emission of energy in the crystal. A novel feature of the invention is a coating applied on the reflective elements (16 and/or 18) for minimizing the secondary emission. This constrains the energy to be output by the arrangement (10) at the wavelength of the desired primary emission. In the alternative, the arrangement (10) may be optimized to output one or more of the secondary emissions.

A method for restraining the secondary emission of a surface nano-structure of a microwave component comprises the following steps that: a metal nano-structure is formed on a good conductor layer of a microwave component basal body; different test conditions are selected, and comprise the porosity, depth-to-width ratio and shape of the nano-structure; a Monte-Carlo simulation is utilized to simulate the collision and absorption processes of an electron which enters the nano-structure and the collision, absorption and escape processes of a secondary electron which is produced by the electron, and the secondary emission yield of a single nano-structure is theoretically obtained; and according to the principle of secondary emission yield, various surface treatment technologies are utilized to adjust the shape, depth-to-width ratio and porosity of the surface nano-structure of the microwave component, so the secondary emission yield is the minmum. The method can greatly improve the micro discharge threshold of the microwave component which undergoes the electrochemical silvering surface treatment; and the secondary electron trap structure with high depth-to-width ratio is easier to realize, the influence on surface roughness can be neglected to a certain extent, and negative effects which are caused by restraining the secondary emission yield (SEY) of the current large roughness structure surface are solved.

The invention discloses a method for treating asphalt gas efficiently and harmlessly. The method comprises the following steps of: performing reaction adsorption on the asphalt gas and calcined petroleum coke powder in a Venturi reactor; collecting dust and coke tar from the gas in a bag-type duster remover for recycle; after removing the coke tar and dust-containing steam in the asphalt gas, performing burning treatment by using a regenerative combustion furnace, wherein the burning temperature is higher than 800 DEG C and the burning time is 1 to 2 seconds; and decomposing polycyclic aromatic hydrocarbons such as benzopyrene, benzanthracene and carbazole in the gas after the burning treatment for effectively removing harmful substances of the polycyclic aromatic hydrocarbons such as the benzopyrene, the benzanthracene and the carbazole, wherein the harmful substance content of the treated gas is below 5 mg/m<3>. By using the method, the harmful substances of the polycyclic aromatic hydrocarbons such as the benzopyrene, the benzanthracene, the carbazole and the like are removed effectively; and the harmful substance content of the gas after the treatment is below 5 mg/m<3> which is far below a national secondary emission standard.

A light emitting arrangement is provided, comprising:—a solid state light source (101) adapted to emit primary light (L1); and—a wavelength converting member (102) comprising a plurality of wavelength converting domains (102a, 102b, 102c, etc) for converting primary light into secondary light (L2), each wavelength converting domain thereby providing a sub-range of the total light output spectrum, wherein at least some of said wavelength converting domains are arranged as an array and comprise quantum dots, wherein different wavelength converting domains comprise quantum dots having different secondary light emission ranges providing different sub-ranges of the total light output spectrum, and wherein a sub-range provided by each wavelength converting domain overlaps or is contiguous with at least one other sub-range provided by another wavelength converting domain. By arranging materials having different wavelength conversion properties in different domains, preferably in a plane, re-absorption of secondary emission can be avoided.

Provided is a communication method of a secondary transmitter included in a multiple-antenna based multiple input multiple output (MIMO) cognitive radio communication system, the method including: estimating an interference channel between the secondary transmitter and a primary user in each of at least one first spectrum band that is being used in a primary system; calculating an orthogonal projection matrix to cancel interference with respect to the primary user from the interference channel; calculating an effective channel between the secondary transmitter and a secondary receiver based on the to orthogonal projection matrix; and selecting an index of an optimal spectrum band from the at least one first spectrum band based on the orthogonal projection matrix and the effective channel.

For a PDP, a panel having favorable discharge properties such a high discharge efficiency and a short discharge delay, being chemically stable and capable of electric power saving, is desired.

A plasma display panel comprising a front substrate and a rear substrate facing each other via a discharge space, discharge electrodes formed on at least one of the front substrate and the rear substrate, a dielectric layer covering the discharge electrodes, and a protective layer covering the dielectric layer, wherein the protective layer contains a Mayenite compound, and the secondary emission coefficients when Ne and Xe are used as excited ions at an accelerating voltage of 600 V, are respectively at least 0.05 at a secondary electron collector voltage at which secondary electrons can be sufficiently captured.

In a laser eye treatment apparatus, a probe light source generates a secondary emitted light emanating from a treatment area of retinal tissue that is irradiated by a treatment light source. An optical detector detects the secondary emitted light. A processor statistically analyzes the secondary emitted light to determine a temperature of the treatment area of retinal tissue.

Cathodoluminescent field emission display devices feature phosphor biasing, amplification material layers for secondary electron emissions, oxide secondary emission enhancement layers, and ion barrier layers of silicon nitride, to provide high-efficiency, high-brightness field emission displays with improved operating characteristics and durability. The amplification materials include copper-barium, copper-beryllium, gold-barium, gold-calcium, silver-magnesium and tungsten-barium-gold, and other high amplification factor materials fashioned to produce high-level secondary electron emissions within a field emission display device. For enhanced secondary electron emissions, an amplification material layer can be coated with a near mono-molecular film consisting essentially of an oxide of barium, beryllium, calcium, magnesium or strontium. Use of a high amplification factor film as a phosphor biasing electrode, and variability of the phosphor biasing potential to achieve brightness or gray scale control are further described in the disclosure.

An arrangement (10) for efficiently shifting energy received at a first wavelength and outputting the shifted energy at a second wavelength. The arrangement (10) includes a laser (12) and an optical parametric oscillator (14) of unique design. The oscillator (14) is constructed with an energy shifting crystal (20) and first and second reflective elements (16) and (18) disposed on either side thereof. Light from the laser (12) at a fundamental frequency is shifted by the crystal and output at a second wavelength. The second wavelength is a secondary emission of energy induced by a primary emission generated by the first wavelength in the crystal. A novel feature of the invention is a coating applied on the reflective elements (16 and/or 18) for containing the primary emission and enhancing the secondary emission. This constrains the energy to be output by the arrangement (10) at the wavelength of the desired secondary emission.

The invention relates to the technical field of radio transmission, in particular to a desktop which is made by the principles of electromagnetic resonance and resonance derivative ring and has the function of wireless power supply. An electrical energy transmitting module is embedded into the desktop, and a plurality of resonance derivation rings are placed around the transmitting module; when the transmitting module transmits electrical energy, the resonance derivation rings absorb part of energy from the transmitting module to perform secondary transmission to transmit the energy to different electrical appliances on the desktop by gradient; an electrical energy receiving module is respectively placed in the electrical appliances such as a display, a sound box, a desk lamp, a keyboard,a mouse and the like on the desktop, and the electrical energy receiving modules respectively receive energy from the desktop and supply power to the different electrical appliances, so that power wires or batteries various devices on the desktop are , wireless power supply the electrical appliances on the desktop is realized, the desktop becomes clean, tidy and safe, and the electrical appliances are convenient to manage, clean and use.

The invention relates to a preparation method for synthetizing a high efficiency water reducing agent by 2-naphthol waste water. The invention belongs to the technical field of concrete water reducing agents. According to the preparation method for synthetizing the high efficiency water reducing agent by the 2-naphthol waste water, the proportion of crude naphthalene to concentrated sulfuric acid to naphthol waste water to formaldehyde is (1:0.8)-(1.0:0.1)-(0.9:0.5)-0.8. The preparation method for synthetizing the high efficiency water reducing agent by the 2-naphthol waste water comprises the following process flows of: 1-, sulfonating: heating to melt crude naphthalene, adding the concentrated sulfuric acid when the temperature rises to 130-160 DEG C, and reacting for 2-2.5 hours at the temperature of 160-165 DEG C; 2-, hydrolyzing: cooling reactants to 90-110 DEG C, adding naphthol waste liquor and hydrolyzing for 0.5-1 hour; 3-, condensation: dropwise adding the formaldehyde at the temperature of 95-115 DEG C and reacting for 3-6 hours; and (4) neutralizing: adding liquid caustic soda to neutralize a condensation compound to regulate a pH value to be 7-9 to obtain a water reducing agent product. The preparation method for synthetizing the high efficiency water reducing agent by the 2-naphthol waste water has the advantages that the production process is simple, the operation is convenient, the process control is easy, waste is turned into wealth, and thereby, secondary emission cannot be generated, and the economic value and the social benefit are high and the like.