110 results about "Mixed beam" patented technology

A beam mixer for increasing intensity symmetry along a selected axis of a beam (wherein the beam extends from a first edge to a second edge along the axis) is disclosed and may include a plurality of mirrors establishing a spatially inverting path. For the beam mixer, the inverting path may have a beginning and an end and may be characterized in that a part of the beam near the first beam edge at the beginning of the path translates to the second beam edge at the end of the path. For this aspect, the beam mixer may further include an optic dividing the beam into first and second beam portions, the optic placing the first portion onto the inverting path and recombining the first and second portions onto a common path after the first portion has traveled along the inverting path thereby mixing the beam.

A radiation therapy method that includes directing a beam along a beam path toward a treatment area. Performing a correction process on the beam, the process includes selectively collimating the beam based on a dose that takes into account bremsstrahlung interactions caused by the beam.

The invention discloses a double-shaft micro-electromechanical system (MEMS) scanning-based heterodyne interference system and a double-shaft MEMS scanning-based method, relates to a quick scanning-based laser heterodyne interferometer system and a quick scanning-based laser heterodyne interferometer method, and solves the problems that the operation wavelength of the conventional cross-polarization heterodyne interferometer technology is a visible light wave band and shaking errors are large. The scheme is that: 2 mu m polarization orthogonal laser is subjected to beam splitting by a beam splitter prism to form a transmitted beam and a reflected beam, wherein the reflected beam serving as a reference intermediate frequency signal is transmitted to a computer, S light in the transmission beam is reflected, P light is transmitted, passes through a one fourth wave plate, an MEMS oscillating mirror and an F-theta lens, passes through a to-be-tested sample cell, returns according to the original optical path and is mixed with the P light; and a mixed beam serving as a measurement intermediate frequency signal is sent to the computer, and is processed by the computer so as to obtain the physical quantity information of a to-be-tested sample. The system and the method are suitable for the detection field of infrared optical materials.

The invention discloses a large-scale MIMO beam domain's secure communication method, comprising the following steps: 1) a base station generates a beam set that covers an entire community through a simulation multi-beam forming method or a digital multi-beam forming method or a simulation-and-digital-mixed beam forming method, wherein the base station carries out beam domain's secure communication with valid users on the generated beams; and 2) the base station utilizes the beam domain statistic channel information of the valid users and the eavesdropping users to perform power distribution to transmission signals; or the base station distributes different beams or beam sub-sets to each valid user for communications through the beam domain statistic channel information of the valid users and the eavesdropping users. The method of the invention ensures the security of wireless communications, and at the same time, the method is suitable for a time division duplex and frequency division duplex system to obtain a near-optimal power distribution performance.

The invention relates to a bridge girder erection machine capable of passing through a tunnel and realizing girder erection and a bridging process thereof. The bridge girder erection machine comprises a mainframe and a lower guide beam, the mainframe comprises a main beam, and also comprises a rear ground jack, a rear guide beam overhead travelling crane, a rear crane trolley, a front crane trolley, a front ground jack, an auxiliary travelling ground jack and a front guide beam overhead travelling crane which are arranged successively from the rear end to the front end of the main beam; a track is arranged on the main beam, and the front crane trolley, the rear crane trolley, the front guide beam overhead travelling crane and the rear guide beam overhead travelling crane run on the track; the lower guide beam comprises a main beam of the lower guide beam, a rear ground jack arranged behind the lower part of the main beam, and a front ground jack arranged in front of the lower part of the main beam; the bridge girder erection machine and the bridging process can realize bridge girder erection and beam erection operations in mountain areas; a mode of mixed beam taking by the crane trolleys of the bridge girder erection machine, a beam transporting vehicle and a pack trolley can realize beam erection at a tunnel portal; and when passing a tunnel, a plurality of components can be retracted and folded to enable the bridge girder erection machine to pass through the channel conveniently without being limited by the diameter of the tunnel, and the bridging construction efficiency is high and the bridging operation is stable.

A pre-stressed concrete mixed beam structure with corrugated steel web is provided, wherein L type steel symmetrically combines the corrugated steel web to combine concrete and said corrugated steel web in terms of bolt. In order to enforce the combination force when the corrugated steel web combines with the concrete, the corrugated steel web ventral plate pre-stressed concrete mixed beam structure is: L type steel combining with the corrugated steel web on upper end or lower end of the corrugated steel web symmetrically in vertical direction approximately, the vertical surface of the L type steel combining with the corrugated steel web with combination bolt, a plurality of support columns are jointed on the level surface of the L type steel, and L type steel arranged on upper end and lower end of the corrugated steel web and said support columns are wholly imbedded into the concrete.

The invention discloses a composite beam wherein the concrete slab is combined with upside and underside of the steel beam with corrugate steel web so as to increase rigidity of the cross section. A prestress concrete composite beam with corrugate steel web contains steel beam, upper and lower concrete slab combined with the upside and underside of the steel beam. The steel web is made of corrugate steel plate with the same corrugate pleat as each other in vertical direction of the beam, thereby increasing resistance to bending. The pylome is formed in upside and underside of the steel beam. Many binding reinforcements insert into the pylome in horizontal direction and embed into the upper and lower concrete slab. Then the steel beam is combined with the upper and lower concrete slab.

In a photomask projection system, a photomask mask is illuminated by light from two lasers. A beam from one of the lasers is mixed with a beam from the other laser to provide two mixed beams each containing of portion of the beams from both lasers. The mixed beams are directed at an angle to each other and intersect on the photomask.

A method of analysis of a sample, including the steps of: (a) splitting an input optical beam into a probe beam and reference beam; (b) utilizing the probe beam to interrogate a sample and obtaining a return sample beam there from; (c) manipulating the reference beam into a predetermined polarization state; (d) mixing the return sample beam and reference beam producing a series of mixed beams; and (e) analyzing the polarization components of the series of mixed beams.

The invention discloses a self-anchored suspension bridge with single-tower, comprising a cable tower and main cable, main beam and suspender. The middle part of main cable is supported by the top of cable tower and two ends of main cable are fixed on the main beam. The main beam is hung under the main cable by the suspender. The main beam is mixed beam and the main suspending part is steel stiffing beam. Side-suspending part and anchor-suspending part at two sides of main suspending part are concrete stiffening beams. The steel stiffening beam and the concrete stiffening beam are connected by steel-concrete joint part. Concrete stiffening beam at the steel-concrete joint part is covered by bearing steel plate and the bearing steel plated is fixed with the steel stiffening beam at the steel-concrete joint part. The invention is provided with simple structure, larger suspending ability, considerable economic benefit and durability. When it is built there is no influence to navigation.

A beam scanning printer which includes a light mixing device for mixing green, red and blue rays radiated from three LEDs with each other and directing the mixed beam to a common converging optical system along a common optical axis is provided. Through the common converging optical system, a beam spot that is common to the three colors is formed. The common beam spot is scanned through a polygonal mirror across a photosensitive material in a main scanning direction as the photosensitive material is moved in a sub scanning direction transverse to the main scanning direction, to record a full-color image on the photosensitive material.

The invention discloses a four-frequency laser gyro signal reading method based on electronic signal processing. In the method, the separation of beat-frequency signals of two single gyros is finished by electronic signal processing instead of optical signal processing, so that beams output by a four-frequency differential laser gyro can be mixed together by means of only one simple prism, and the sensitive angular velocity of the four-frequency laser gyro can be extracted from the mixed beams by using the electronic signal processing algorithm. The simplified beam-combining assembly has the advantages of less attenuation of optical signals, simple structure and higher firmness and is easy to assemble.

Method and apparatus for detecting a species in a dilute medium, the species having a spectral feature, the apparatus comprising: a beam source arranged to generate a first laser beam and a second laser beam coherent with each other, and having a matching chirp pattern. Beam guide arranged to pass at least the first laser beam through the dilute medium; a beam mixer arranged to mix the first and the second laser beams to form a mixed beam. Detector arranged to detect, during the chirp pattern, the mixed beam and to measure changes in the mixed beam caused by refractive index variations in the dilute medium across a spectral feature. Output providing a signal that changes in response to the measured changes.

An apparatus and method for detecting refractive index variations in a sample is disclosed. The apparatus includes a multi frequency laser source configured to generate a mixed laser beam having at least two optical frequencies. A sinusoidal function generator is configured to modulate the optical frequencies to generate a chirp-modulated mixed laser beam. The chirp-modulated mixed laser beam being configured to pass through the sample. A detector is configured to detect the chirp-modulated mixed beam. A signal processer is configured to process the detected chirp-modulated mixed beam to measure refractive index variations in the sample.

A system, method, and computer readable medium for rogue Optical Network Unit (ONU) detection via photonic mixing, comprises a first Wavelength Division Multiplexer (WDM), a second WDM communicably coupled to the first WDM, a non-linear medium communicably coupled to the second WDM, and a photodetector communicably coupled to the non-linear medium, wherein the first WDM transmits a first upstream beam and a second upstream beam to the second WDM, wherein the first upstream beam is a normal upstream beam and wherein the second upstream beam is a rogue upstream beam, wherein the second WDM transmits the normal upstream beam and the rogue upstream beam to the non-linear medium, wherein the non-linear medium mixes the normal upstream beam and the rogue upstream beam resulting in a mixed beam, wherein the non-linear medium transmits the mixed beam to the photodetector, and wherein the photodetector analyzes the mixed beam to indicate the presence of a rogue ONU.

The invention discloses an optimization method for lower deflection treatment of continuous beam bridge with variable cross-section in vitro and in vivo. The method comprises: step S1, establishing afinite element model of the in vivo-in vitro mixed-beam variable-section continuous beam bridge; according to the continuous beam bridge Based on the parameters and the layout of the interface, the finite element analysis software ANSYS is used to establish the spatial finite element model of the in vitro and in vitro beam-variable continuous beam bridge, and the performance and parameter analysisof the bridge after the bridge is calculated and analyzed; Step S2, under the continuous beam bridge The influencing factors of the bending behavior and the analysis of the parameters of the mixed beam treatment; Step S3, optimization of the continuous rigid frame bridge of the in vitro and in vivo hybrids. The invention has the advantages of simple principle, accurate calculation, obvious effectand good application value.

The invention discloses a tip rod adopting chitosan fiber beams as filter materials and a preparation method of the tip rod, and belongs to the technical field of cigarette filter tips. The tip rod adopting the chitosan fiber beams as the filter materials is formed by beams and forming paper covered outside the beams, the beams are the chitosan fiber beams or are mixed beams of the chitosan fiber beams and cellulose acetate fiber beams, the weight ratio of the chitosan fiber beams to the cellulose acetate fiber beams in the mixed beams is 10 percent-90 percent: 90 percent-10 percent. According to the preparation method provided by the invention, the tip rod production equipment and technology in the prior art are basically adopted, the implementation and the operation are easy, the equipment is not added, the production method is successfully improved, and the production and the preparation of the novel tip rod are completed. The filtering effect of the tip rod is good, the material resources are rich, in addition, the degradation is easy, the technical advantages are realized, and in addition, huge potential economic benefits and wide popularization and application markets are also realized.

The invention provides a noise filtering method and device for Brillouin signal space frequency spectrum regulation and control. The method includes: adding a phase image to the signal light to achieve target distribution presetting of the signal light intensity; loading spiral phase converters with different topological charges on the spectral surface of the first set of optical 4f imaging system, and regulating and controlling the frequency spectrum of the phase image; utilizing a second set of 4f imaging system to image the phase image frequency spectrum into a nonlinear medium, and introducing pump light from the other side of the amplification medium to enable the pump light to perform stimulated Brillouin amplification on the signal light frequency spectrum; adopting a second opticallens of the first set of optical 4f imaging system to carry out inverse Fourier transform and Fourier transform on the signal light spectrum and noise in the mixed light beam output from the nonlinear amplification medium respectively, so as to enable the amplified signal light intensity output through spatial spectrum regulation and control to be distributed at the edge position of the target phase image and to be separated from the noise spectrum focused at one point; and filtering out noise in the mixed light beams through a spatial filter, and obtaining pure amplified signal light.

The invention provides a supersonic laser deposition spray gun, a laser deposition device and a laser deposition method. A laser beam channel and a powder and gas mixed beam channel are formed in thesupersonic laser deposition spray gun, a laser beam stretches along the central axis of the supersonic laser deposition spray gun, the powder and gas mixed beam channel is distributed along the periphery of the laser beam channel, and the powder and gas mixed beam channel is provided with a laval spray pipe structure; the laser deposition device comprises the laser deposition spray gun. The laserdeposition method is implemented based on the laser deposition device. The supersonic laser deposition spray gun achieves tight and deep combination between the laser beam and the supersonic powder beam, so that a material is deposited and prepared quickly and efficiently with high quality and low cost. The supersonic laser deposition spray gun has wide popularization and application prospects.

The invention discloses an optical fiber Raman spectrum gas analysis device, which belongs to the technical field of gas analysis, and comprises a laser, a light beam coupling device, a gas sample chamber, a collimation beam splitting device and a photoelectric imaging receiving device, wherein the light beam coupling device couples the laser into the gas sample chamber; the laser reacts with gasto be detected in the fiber core of the hollow-core optical fiber to generate Raman scattering; the collimation beam splitting device collimates the mixed light beams and then separates out laser, andtransmits the light beams only containing scattering signals to the photoelectric imaging receiving device; and the photoelectric imaging receiving device performs digital spatial filtering on the forward scattering signal to obtain a Raman spectrum of the to-be-detected gas. To-be-detected gas reacts with laser in the hollow-core optical fiber to generate an enhanced Raman scattering signal, thephotoelectric imaging receiving device is used for collecting forward signals and implementing digital spatial filtering, so that background signals of the gas sample chamber are reduced, the problemthat trace components are difficult to detect in Raman gas analysis is solved, and the detection sensitivity of the system is improved.

The invention discloses a multi-color super resolution microscope system with an automatic alignment function, belonging to the field of microscopic imaging. The system couples an excitation beam anda suppression beam into the same single mode polarization-maintaining fiber to form a mixed beam. Only the suppression beam is affected while the excitation beam is unaffected when the mixed beam is phase modulated via a phase modulation assembly. According to the multi-color super resolution microscope system with the automatic alignment function, the influence of beam drift on the performance ofthe super resolution microscope system can be avoided, so that the system structure is simplified, and the system stability is improved. Compared with the prior art, the system disclosed by the invention can conveniently realize multi-color imaging.

The invention relates to a road-rail co-layer mixed-beam suspension cable-stayed cooperation bridge. The bridge comprises a main beam and at least two bridge towers, wherein the two bridge towers aresequentially arranged along the bridge direction, a road bridge deck and an rail bridge deck are arranged on the main beam in the same layer, the two adjacent bridge towers are connected through a main cable, and the main cable is connected with main beam bodies below through a sling; and each bridge tower is connected with main beam bodies on the two sides through an stay cable. According to theroad-rail co-layer mixed-beam suspension cable-stayed cooperation bridge, a suspension structure of the main cable plus the sling and a cable-stay structure of the stay cable are combined, the advantages of a suspension bridge and a cable-stayed bridge are brought into full play, thus effective improving the rigidity of 1/4 of the span and span area structure; in addition, the main beam is large in overall rigidity and reasonable in stress, so that the span of a bridge can be improved to 1600 m, the overall rigidity of the structure is large, and accordingly requirements of railway track shapedeformation can be fully met.