37results about How to "Uniform energy density" patented technology

The invention discloses a nano nickel-based methanation catalyst which comprises the following components in percentage by weight: 20-35 % of NiO, 55-79 % of a carrier, and 0.1-10 % of a structure additive. The nano nickel-based methanation catalyst disclosed by the invention has the advantages that the catalyst is applicable to a slurry bed methanation process, high in catalytic activity, and good in stability.

The invention discloses a laser preprocessing device and processing method used for an optical element. The laser preprocessing device comprises a laser light source used for emitting laser as well as a light-splitting chopping plate, a reflecting mirror, a light beam shaping system and an electric translation stage used for placing a to-be-processed optical element are sequentially arranged in the laser transmission direction, wherein laser emitted by the laser light source passes through the light-splitting chopping plate and then is transmitted to the light beam shaping system through the reflecting mirror; the light beam shaping system is used for performing light beam shaping on laser; laser spots which are in Gaussian distribution are shaped into square spots which are uniformly distributed flatly; and finally, the laser is irradiated to the surface of the optical element for performing laser preprocessing on the optical element. According to the laser preprocessing device disclosed by the invention, irradiation energy density of the whole preprocessing process is uniform through the uniform square laser pots which are flatly focused, and dimensions of the spots are easily regulated through a multiplying power switching structure, so that the purpose of regulating energy density of laser which reaches the surface of the optical element is achieved.

The invention discloses a multi-mode microwave heating cavity for treating dump leaching uranium ore. The multi-mode microwave heating cavity comprises fifteen microwave power feeding ports and waveguides, two illuminating ports, a humidity-discharging port and an openable operating window. Energy is fed back by adopting a plurality of ports, the ports are isolated from one another by appropriate distances, microwave power enters a box body at different phases, distribution of each path in maximum modes is formed in the box body after repeated reflection for obtaining higher field uniformity, and meanwhile, sufficient microwave power density can be achieved in the box body in a power synthesis way. The multi-mode microwave heating cavity is further characterized in that energy is fed back through two paths of waveguide ports in a 90-degree orthogonal polarization way, so that power coupling among the ports is reduced. The multi-mode microwave heating cavity can be applied to a microwave treatment system for dump leaching uranium ore, and is also suitable for microwave drying equipment, microwave sterilizing equipment and microwave high-temperature baking equipment of various types. The multi-mode microwave heating cavity has the advantages of high matching property among power feeding ports, low microwave reflectivity, uniform energy density, high coupling property with materials, high heating efficiency, small microwave leakage, use safety and the like.

The invention relates to a dual-wavelength laser annealing device and a method thereof. The dual-wavelength laser annealing device comprises a green laser device and an infrared laser device; an output optical path of the green laser device is sequentially provided with a beam expanding module, a green light bar-type spot reshaping module, and a green light 45-degree reflector; an output optical path of the infrared laser device is sequentially provided with an infrared bar-type spot reshaping module, and an infrared 45-degree reflector; output optical paths of the green light 45-degree reflector and the infrared 45-degree reflector are provided with a beam combining projection focus lens; an output optical path of the beam combining projection focus lens is provided with a variable diaphragm; and an output end of the variable diaphragm is directly opposite to a machining platform. Two laser beams are combined into one beam via the optical assembly; the combined laser beam is converted from a circular Gaussian distribution into a bar-type Gaussian distribution after being coordinated, adjusted and converted among optical elements; the laser is a bar-type light spot after the beam combination; the introduction of the infrared wavelength provides a deeper annealing depth for the light spot, makes the temperature rise at the moment that the laser contacts with the surface of material, thereby increasing the activation rate of implanted ions; and therefore the machining effect is better.

A laser beam mixing apparatus to convert a laser beam bundle into a single laser beam having a uniform energy density. The laser beam mixing apparatus includes: a barrel to adjust a distance between a multi-core optical cable and an optical lens included therein, to convert a laser beam bundle into a single beam; and a stage to adjust the position and angle a single-core optical cable with respect to the optical lens, to align the core of the single-core optical cable with the center of the single beam.

A solar thermal collector apparatus comprising at least one thermal collector module (11). Each thermal collector module (11) comprises a hollow container (2) having an inlet and an outlet. A flow controller is arranged between the hollow container (2) and an inlet main pipe and / or an outlet main pipe. Each thermal collector module (11) also comprises at least one temperature sensor (4) and / or a light illuminance sensor (3), and is in a communication connection to a control system for measuring the temperature and / or the incident illuminance value. The control system comprises a feedforward regulator unit, which, after analysis and computation on the basis of the temperature and / or the illuminance value of each hollow container (2), generates a feedforward regulating signal for regulating each flow controller, thus altering the flow rate and / or the flow velocity of an endothermic working medium of the corresponding hollow container (2), and allowing the endothermic working medium to reach a predetermined pressure and temperature at the outlet of each thermal collector module (11). The solar thermal collector apparatus ensures uniform pressure and temperature of the endothermic working medium at the outlet of each thermal collector module (11), and obviates control signal lag.

The present invention relates to an apparatus for repairing a bright point defect in a display device, and more particularly, to an apparatus for repairing a bright point defect in a display device having a uniform laser beam energy density across the entire scope of a laser radiation area. The apparatus for repairing a bright point defect according to the present invention comprises: a laser part for radiating a laser beam onto a color filter having a bright point defect; a scanner for scanning the laser beam in a radiation area of the color filter; and beam-processing surface control means for filtering and preventing the scanned laser beam from being radiated onto the color filter in an acceleration section or a deceleration section.