32results about How to "Reduce the spread angle" patented technology

A radiation phase image radiographing apparatus, including a radiation emission unit having multiple radiation sources for emitting radiation onto a subject, the radiation sources being distributed such that radiation emitted from each of the radiation sources and transmitted through the subject forms a part of a projected image of the subject, a first diffraction grating configured to be exposed to the radiation emitted from the multiple radiation sources of the radiation emission unit and to produce a Talbot effect by the exposure, a second diffraction grating for diffracting the radiation diffracted by the first diffraction grating, and a radiation image detector for detecting the radiation diffracted by the second diffraction grating.

An on-vehicle object detector has both a relative position measuring device and an image-taking device. The relative position measuring device is for scanning a frontal area with a beam of electromagnetic waves and measures distance L1 and direction to an object that reflects the waves. The image-taking device is for obtaining an image above a traffic lane in front and measures distance L2 to an object detected on this image. The vertical angle of spread of the electromagnetic beam is reduced if it is indicated by these devices that there is an object for which |L1-L2| satisfies a specified condition, indicating that there is an overhead road sign which is likely to affect the accuracy of measurement.

The invention provides a nitrine type high-molecular sensitized high-energy ablator which comprises the components by weight part: 5 to 80 parts of nitrine type material, 5 to 70 parts of high energy material and 5 to 15 parts of additive. The invention also provides a preparation method of the ablator and a target belt made from the ablator. According to the invention, an ablative material layer made via the method utilizes the viscous characteristic of the nitrine type high-molecular sensitized high-energy material, integrates the energy of the nitrine type material and the high energy material, and has the advantages of low ablative threshold value, high energy content and viscosity; and the cohesive property between a substrate and the ablator meets the use requirement, and the utilization rate of the laser energy can also meet the use requirement.

The invention belongs to a medicinal laboratory air distribution device for a medicinal building laboratory. The device comprises an air supply connection port connected with an indoor air supply system, wherein the air supply connection port is connected with the lateral surface of an air distribution static pressure box with trapezoidal section, a V-shaped air distribution guide plate is arranged in the air distribution static pressure box, two top edges of the upper opening of the V-shaped air distribution guide plate are welded with the top edges of the air distribution static pressure box respectively, a distance is reserved between the bottom of the V-shaped air distribution guide plate and the bottom surface of the air distribution static pressure box, the plate surface of the V-shaped air distribution guide plate is opposite to the air supply direction of the air supply connection port, and the V-shaped side of the V-shaped air distribution guide plate is welded with the box body of the air distribution static pressure box. In order to solve the technical problems, the invention provides the reasonable and effective air supply device which uniformly and efficiently delivers the air of an air conditioner or an air supply system to a working area of hospital laboratory working personnel, so that the working environment is not affected by the emitted reagents for experiments as little as possible and the air quality of the working area is kept good.

The present invention relates to a semiconductor laser apparatus capable of reducing a spread angle of an emission light with downsizing. The semiconductor laser apparatus has an active region between a first end surface and a second end surface. A first reflection structure and a partial reflection structure are provided on the first end surface side, and the end surface of the active region is divided into a total reflection region and a partial reflection region in combination with these first reflection structure and partial reflection structure. A laser resonator is constituted by the first reflection structure and partial reflection structure. On the second end surface side, a second reflection structure is provided to be positioned on the way of a resonance optical path of the laser resonator. While the light emitted within the active region propagates on a resonance optical path, an induction emission is produced, and thereby the semiconductor laser carries out a laser oscillation. As a result, among the light arrived at the partial reflection structure, the part having transmitted through the partial reflection structure is outputted outside the semiconductor laser apparatus.

The invention relates to a method and a sensor for detecting the relative sliding velocity between a plate and a mould in a stamping process. The method comprises the following steps of: (1) forming an area measured laser image on the measured surface of a steel plate; (2) acquiring the image information of continuously changed patterns and outputting the image information to a signal processor by using an image sensor; (3) analyzing the movement amount of a characteristic area by adopting a self-correlation image processing algorithm, and outputting displacement information; (4) outputting sliding velocity data by using a master control unit; (5) adjusting an acquisition frequency by using the master control unit; (6) obtaining a conversion function for a sliding velocity value and sliding velocity data: y=ax+b; and (7) obtaining an actual relative sliding velocity. By using the detection method and the sensor, the sliding velocity can be measured in a real-time and non-contact way in a plate stamping process. The method has high operability and can be used for determining the sliding velocity of the steel plate relative to the mould in plate stamping deformation by matching a corresponding test device, thereby meeting requirements on scientific research and test.

In an arrayed waveguide grating, a wedge-shaped groove formed in an arrayed waveguide section or a silica-based waveguide section in a periphery of the groove is modified in either one of the procedures below or in a particular combination thereof to suppress spreading of light in the groove to thereby reduce the excess loss due to addition of the groove. The material filled in the groove is a photosensitive material having a negative refractive index temperature coefficient. Using the photosensitivity, refractive index difference is provided in the groove to form optical waveguides in a horizontal direction or in vertical and horizontal directions. The material filled in the groove has a negative refractive index temperature coefficient to minimize a spreading angle of light incident to the groove. Width of each silica-based waveguide is enlarged before and after the groove to decrease the spreading angle of light incident to the groove. This method reduces the excess loss of the arrayed waveguide grating in which a wavelength characteristic is kept unchanged with respect to a change in ambient temperature.

The invention discloses an unpowered powder pumping and continuous dispersive mixing method and an unpowered powder pumping and continuous dispersive mixing device. The device consists of a shaftless spiral dispersive mixing device and a powder pumping device, wherein a pipe body in the shaftless spiral dispersive mixing device is connected with a mixing pipe in the powder pumping device through a flange; the shaftless spiral dispersive mixing device is arranged on a spraying pipeline by connecting; when a spraying vehicle is started, a natural fluid passes through a water pipe and forms a high-speed fluid at a nozzle; the high-speed fluid pumps and compresses gases in a powder pumping mechanism so as to generate negative pressure in the powder pumping mechanism; and outside powder passes through the inner parts of a powder pumping pipe, a connection pipe and a mixing chamber under the action of the negative pressure, then flows into a spiral body which is connected with the mixing pipe from the mixing pipe together with the natural fluid, and is dispersively mixed to form a rotational fluid which can be spirally sprayed through the spraying pipeline. The device has low power consumption, can directly reduce the investment cost of manufactures, and is easy to wash and convenient to disassemble and maintain, and the combination of the powder pumping device and the shaftless spiral dispersive mixing device ensures a better dispersive solvation effect of a disinfectant solute.

The invention discloses a backlight device and display equipment. The backlight device comprises a plurality of LED light sources, a substrate, a concave lens structure, an optical diaphragm and a reflector cup structure, wherein the concave lens structure is used for distributing light emitted by the LED light sources; the optical film is arranged above the concave lens structure; the LED light sources are mounted on the substrate; the reflector cup structure is used for reflecting a part of distributed light of the concave lens structure toward one side of the display surface of the backlight device; a concave surface of the concave lens structure is arranged on the light emitting sides of the LED light sources; openings are formed in the bottom of the reflector cup structure, and the LED light sources and the concave lens structure are arranged in the openings. The invention provides a backlight device capable of improving uniform light output of a surface light source, and the utilization efficiency of light is improved.

A submersible electric pump comprises a motor, a guide vane body and an impeller body, wherein one end of a motor shaft of the motor stretches out of an end cover, stretches into the guide vane body and is correspondingly connected with an impeller hub located in the impeller body; a planetary gear speed reducing mechanism is arranged in the guide vane body; one end of the motor shaft, which stretches out of the end cover, is connected with a wheel shaft of a sun wheel of the planetary gear speed reducing mechanism by a shaft coupler. The planetary gear speed reducing mechanism is composed of a gear box, a gear ring, a sun wheel system and planetary wheels; the gear ring is arranged along the radial direction of an inner wall of a cavity of the guide vane body; the gear box with a round box shape is coaxially arranged in the gear ring and the sun wheel system is coaxially arranged in the middle of the gear box; the sun wheel system is composed of a sun wheel arranged in the gear box and a second sun wheel arranged at the stretching-out end part of the wheel shaft of the sun wheel; the second sun wheel is an input end and is connected with the motor shaft; the sun wheel is an output end; more than two planetary wheels are engaged on the sun wheel; the planetary wheels are exposed out of corresponding openings in the side wall of the gear box and are engaged with the gear ring.

The invention relates to a large-area collimated light source. The large-area collimated light source comprises an integrated high-power LED light source, a compound parabolic concentrator called a CPC lens for short, a Fresnel lens, heat dissipation fins and a fan, wherein the fan is arranged at the bottoms of the heat dissipation fins and is used for forced refrigeration by blowing. The integrated high-power LED light source is arranged on the heat dissipation fins, and the compound parabolic concentrator is arranged in the front of the integrated high-power LED light source. Light emitted by the integrated high-power LED light source comprises paraxial light and non-paraxial light. After passing through the Fresnel lens, the paraxial light is converted into collimated light which is emitted. The non-paraxial light is collected by the CPC, converged on the Fresnel lens, and then converted into collimated light which is emitted. The large-area collimated light source adopts combination of the integrated high-power LED light source, the compound parabolic concentrator and the Fresnel lens, and realizes the uniform emitting of light emitted by the LED light source, thereby obtaining the large-area collimated light source and effectively improving the uniformity of light emitting and reducing an emission angle of emitted light.

The invention discloses a signal light gun, and the signal light gun comprises a gun base, a sighting telescope and a signal light emitting assembly; the signal light emitting assembly is arranged onthe gun base, the sighting telescope is arranged on the signal light emitting assembly, and the light signal emitting direction of the signal light emitting assembly is the same as the sighting direction of the sighting telescope. The invention further discloses portable lamplight communication equipment comprising the signal light gun. The signal light gun and the portable light communication equipment provided by the invention can emit complex light signals to perform information interaction with an aircraft, are convenient to generate the light signals directly facing the aircraft, ensure light signal transmission, are high in maneuverability, and are beneficial to effectively guiding the aircraft in various environments such as radio communication failure and the like.

An optical engine module and a projection device are provided. The optical engine module includes a light source unit, a first diffusion element, a polarizing beam splitting element, a second diffusion element, and a light valve. The light source unit emits a light beam. The first diffusion element is disposed on a transmission path of the light beam. The polarizing beam splitting element is disposed on the transmission path of the light beam. The first diffusion element is disposed between the polarizing beam splitting element and the light source unit. The second diffusion element has at least one optical surface to reflect and diffuse the light beam. The light beam forms an illumination beam after passing through the second diffusion element, and the illumination beam has an optical image matching angle. The light valve is disposed on a transmission path of the illumination beam. The light valve converts the illumination beam to an image beam.

The invention discloses a synchronous display signal light gun which comprises a gun seat, a sight, a signal light transmitting assembly and a synchronous display module, wherein the signal light transmitting assembly is arranged on the gun seat; the sight is arranged on the signal light transmitting assembly; the light signal transmitting direction of the signal light transmitting assembly is thesame as the sighting direction of the sight; the synchronous display module is arranged at the visual position of the gun seat or the signal light transmitting assembly; and the synchronous display module is used for receiving and synchronously displaying light signals transmitted by the signal light transmitting assembly. The invention further discloses portable light communication equipment comprising the synchronous display signal light gun. The synchronous display signal light gun and the portable light communication equipment provided by the invention have the advantages of squarely transmitting the light signals to an aircraft, ensuring the transmission of the light signals, realizing high maneuverability, effectively guiding the aircraft in various environments such as radio communication failure and the like, and helping an operator find out whether the transmitted light signals are correct or not so as to ensure errorless signal transmission.

The invention relates to an ultrasonic flaw detection method, and systematically provides a longitudinal wave flaw detection method adopting a high-frequency bicrystal normal probe, a bicrystal high-frequency probe is adopted for detection, a single-crystal normal probe is adopted for transmission correction compensation, and the detection accuracy can be obviously improved through combined use of the two probes; furthermore, the focal length and the size of the bicrystal normal probe are correspondingly selected according to the product size and the detection effect, so that technicians can quickly respond to detection, the efficiency is improved, and the stability of the detection result is ensured. According to the invention, the single crystal normal probe is adopted to carry out transmission correction measurement on the near-field region by adopting the unequal-thickness test blocks, and the method for measuring the transmission correction compensation by adopting the single crystal normal probe in the near-field region is creatively provided, so that the influence of focusing during direct measurement of double crystals is reduced, the material attenuation is correctly evaluated, and the reliability of the transmission correction compensation is ensured.