153 results about "Laser" patented technology

The invention discloses an automated linear displacement sensor calibration device which mainly comprises a substrate, and dual linear guide rails, a grating ruler, a servo motor and a vertical lifting device which are fixed on the substrate; a roller screw rod is connected with the servo motor by a coupler; a horizontal regulation device, a universal clamp and a locking nut are clamped with one another and are connected with the vertical lifting device; a sliding laser reflection mirror support frame, a sliding laser interferoscope support frame and a sliding dual-frequency laser interferometer support frame are fixed on the linear guide rails; a fixed pull rod, a laser reflection mirror and a grating ruler reading sensor are fixed on the sliding reflection mirror support frame; a laser interferoscope is fixed on the sliding interferoscope support frame; a dual-frequency laser interferometer is fixed on the dual-frequency laser interferometer support frame. The calibration precision can be ensured by the arrangement of the laser calibration mechanism, manpower and time cost are greatly reduced, and the calibration work efficiency is enhanced.

The use of porous monolithic matrix for matrix-assisted laser desorption/ionization time of flight mass spectrometry analysis on a sample suspected of containing an analyte is herein described. The porous polymer monoliths provide a matrix suitable for use in detecting and analyzing low molecular weight and small molecules. The matrices described herein also facilitate the creation of arrays of monolithic matrices for high-throughput detection and screening using MALDI-TOF mass spectrometry and exhibit a long shelf-life.

The invention discloses an obstacle feature extraction method based on a millimeter wave radar and a laser radar. The method includes the following steps that: step 1, radar raw data are acquired; step 2, the radar original data are solved according to a radar protocol, so that obstacle position information can be obtained; step 3, the solved millimeter wave radar data are screened; step 4, time and space synchronization is performed on the millimeter wave radar and the laser radar; step 5, regions of interest (ROI) are established in a laser radar coordinate system according to millimeter wave radar information and are denoted as Ri, wherein i is equal to 1, 2, ... n, wherein n is the number of the effective targets of the millimeter wave radar; step 6, the point cloud data of the i-th ROI are processed according to a scattered point cloud data simplification processing method; and step 7, a two-dimensional image is generated on the basis of the point cloud data, edge detection is performed on the image, and obstacle features are extracted. With the method adopted, obstacle edge information can be obtained, and therefore, more references can be provided for a driverless decision-making layer.

The invention provides a mixed-light-source liquid-crystal projection light engine system. The portable liquid-crystal projection light engine system is composed of a light source module, a polarized light management module, an image signal module and a projection lens, wherein the light source module consists of a high-brightness laser, an incoherent LED (Light-Emitting Diode) solid light source, a fluorescent device and the like. The output brightness of the projection system is greatly increased, the light source module is safe and environmentally friendly, and projected images have bright color and clear quality. The polarized light management module consists of a color-combining prism, a polarization beam splitter (PBS), a polarization color-combining device and the like, and different polarization states of three-primary-color mixed light are integrated into the same polarized light to be emitted to the image signal module. The image signal module is a monolithic reflection type liquid crystal light modulation device, and image signals are loaded to the three-primary-color polarized light in sequence according to the image signals corresponding to primary colors. The projection lens is used for projecting the light carrying the image signals onto a screen.

A semiconductor laser device including: semiconductor layers including an n-type semiconductor layer, an active layer and a p-type semiconductor layer, the semiconductor layers having a stripe-shaped waveguide region formed therein; end face protective film formed on the end face of the semiconductor layer that is substantially perpendicular to the waveguide region; wherein a p-side protruding portion is formed in the vicinity of the end portion of a p-electrode or n-electrode.

Apparatus for balancing a printing roller having an image producing area thereon, includes a detector for detecting any unbalance of the printing roller during rotation thereof. A computer determines weight adjustments of the printing roller that are required to correct the unbalance, in response to the detection. A laser is controlled by the computer to remove material, in response to the determination, from at least one engraveable plate mounted on the outer surface of the printing roller or from the printing roller itself, in an area outside of the image producing area, in order to balance the printing roller.

The present invention discloses a multi-channel aerosol scattering absorption measuring instrument, comprising a light path device, a detection device and a gas path device. The light path device supplies three different wavelengths of laser entering the detection device in sequence; the detection device is provided with photoelectric detectors at multiple angles for measurement, so as to reduce the measurement error of aerosol scattering coefficient; the gas path device comprises a sample loading unit, a calibration unit and a sample discharging unit; and a light source from the light path device and a gas flow from the gas path device enter the photoacoustic cavity of the detection device respectively and are detected by a control unit. The aerosol scattering absorption measuring instrument of the present invention is characterized by multi-channel, multi-angular, full-scale and direct measurement of scattering phase function and absorption coefficient of aerosol particles, combines the function of synchronously acquiring the optical parameters of an aerosol (such as scattering coefficient, extinction coefficient, visibility, transmittance, single scattering albedo, etc.), and achieves the integrated on-line detection of different optical parameters of an aerosol with high automation degree and good stability.

The invention relates to a multiphoton subpulse STED-SPIM (Selective Plane Illumination Microscopy) microscopic system realized by single wavelength, characterized in that the femtosecond pulse laser emitted by a femtosecond single wavelength laser is transmitted to a first splitter through a first polarization regulator to be divided into two beams of light, and a first beam of light is successively transmitted to a second polarization regulator, a second splitter, a third polarization regulator and a quarter-wave plate along a Y-axial direction to form an excitation light beam; a second beam of light is transmitted to an STED photoquenching system, and the light outputted by the STED photoquenching system is successively emitted into the second splitter, the third polarization regulator and the quarter-wave plate to be modulated into donut-shaped focus spots to form a quenching light beam; a scanner is used for scanning the excitation light beam and the quenching light beam to generate an excitation plate light source and an STED quenching plate light source; an excitation plate light source and an STED quenching plate irradiate an object to be imaged through an excitation objective lens to allow the flourescent dye of the object to be imaged to excite fluorescence, and excited fluorescence is imaged through an imaging objective lens, and is emitted to a photosensitive element or an analysis element successively through an optical filter and a convergent lens.

The invention discloses a fiber reinforced composite material parameter identifying method based on laser nondestructive scanning, and a device. According to the fiber reinforced composite material parameter identifying method based on laser nondestructive scanning, the inherent frequencies, the damping ratio, and the resonance amplitude curves of the former three stages are input, and identification permissible error value is set to be 10%, so that fiber longitudinal elasticity modulus E1, fiber transverse elasticity modulus E2, shear modulus G12, Poisson's ratio v21, fiber longitudinal loss factor eta11, fiber transverse loss factor eta22, and shear loss factor eta12 are obtained.

An apparatus for cooling tissues which are treated with an energy-based device, such as a laser, is disclosed. The apparatus comprises a spray nozzle which generates an atomized liquid spray for the treatment area, wherein the atomized liquid spray is based on a mixture of liquid and gas. Further, the spray nozzle comprises at least one liquid outlet which ejects a liquid, and at least one gas outlet which ejects a gas stream. Besides, the apparatus for cooling comprises at least one delivery means for delivering pressurized gas to the spray nozzle; and a pumping means for the liquid, wherein the pumping means is configured to operate in pulses.

The invention provides an automobile panoramic imaging device and method based on infrared calibration. The device comprises multiple camera shooting acquisition units arranged in different directions around an automobile, a video conversion unit, a video processing unit, a storage unit, a video coding and outputting unit, a display unit and infrared lasers respectively fixed on the multiple camera shooting acquisition units, wherein the camera shooting acquisition units shoot colorful image information in different directions around the automobile; the video conversion unit converts analog signal image information shot by each camera shooting acquisition unit into binary digital image information; the digital image information is stored in the storage unit; and the video processing unit analyzes and processes the information of multiple digital images in the storage unit by virtue of an infrared calibration line emitted from an infrared emitter. According to the automobile panoramic imaging device and method based on infrared calibration, the panoramic information of the automobile and the surrounding environment can be accurately provided for drivers in real time.

The invention relates to the field of rail transportation and machinery manufacturing, and particularly to a composite welding method of a pillow beam, the pillow beam and a rail vehicle with the pillow beam. The method comprises the following steps that laser-MAG composite welding is used for welding the pillow beam of the stainless steel material, and inserted-connected structures of rib plates are optimized; during manufacturing, the rib plates are preassembled and welded to form a rib plate assembly, then the whole structure is welded, so that the pillow beam can adopt to the stainless steel material to replace weathering resistant steel material in whole, the lightweightening of the pillow beam is achieved, and the corrosion resistance of the pillow beam is improved; through the welding modes of inserting connection and corner connection, and a to-be-welded welding seam is placed on the outer surface of a box type structure to adapt to a technology of single-face welding double-face forming of the laser-MAG composite welding; and self-restraint of pillow beam welding is achieved through the self-stiffness of the inserted-connected structures, the advantages of the laser-MAG composite welding of deep welding, low heat input, small welding deformation and good gap adaptability are played, a manufacturing technology without adjustment and repair of the stainless steel pillow beam is achieved, so that the manufacturing and processing efficiency of the rail vehicle are improved, and production cost is reduced.

The invention belongs to the technical field of marine gas hydrate resource development project, and particularly relates to a test method for the transport law of hydrate layer output fine sand in a gravel layer and a test device thereof. A simulated pack stratum sand sub-tube and a simulated pack gravel layer sub-tube are adopted to be connected through a quick connector to form a sand pack model for testing. A shunting steel block is installed at the inlet end, and an online laser particle analyzer and an electronic scale are connected at the outlet end through a porous mesh board. Sampling holes and pressure measurement holes are relatively arranged on the sand pack model. A differential pressure gauge is installed between the two adjacent pressure measurement holes, and all the hardware equipment is connected with a data acquisition and processing module. The change law of the output and the output particle size of the stratum fine sand under the gravel pack condition can be monitored in real time so that the test technology and experimental data support can be provided for the research of the transport mechanism of the fine sand in the pack gravel layer induced by hydrate depressurizing exploitation, and the test method and the test device have an important reference meaning for designing reasonable gravel pack parameters and extending trial exploitation duration.

The invention discloses a neutral point direct current online measurement device for a transformer, which comprises a Hall sensor, a copper bar, a transmission fiber, a signal processing module arranged in a box body, a photoelectric power conversion module, a measurement signal photoelectric conversion module and a power laser launching circuit module, wherein the copper bar penetrates through the two sides of the box body; the copper bar in the box body is sleeved with the Hall sensor; the signal processing module is used for receiving an output signal of the Hall sensor, converting the output signal into an optical signal and outputting the optical signal into the measurement signal photoelectric conversion module; the measurement signal photoelectric conversion module is used for converting the inputted optical signal into an electrical signal to output; the photoelectric power conversion module is used for providing power for the Hal sensor and the signal processing module; and the power laser launching circuit module is used for inputting medium power laser for the photoelectric power conversion module. The neutral point direct current online measurement device adopts the optical fiber to supply the energy and transmit the signals, blocks an over-voltage transmission path and improves the measurement stability and the accuracy.

The invention provides a cross writing and drawing robot which comprises a left base and a right base, wherein a transverse polish rod is arranged between the left base and the right base, and is movably provided with a moving center; a longitudinal polish rod vertical to the transverse polish rod is arranged on the moving center; a penholder module and/or a laser module are/is arranged at the end part of the longitudinal polish rod; and a left motor and a right motor are respectively arranged on the left base and the right base, and can be used for driving the penholder module, the moving center and the longitudinal polish rod to make X-axial movement on the transverse polish rod, or driving the penholder module and the longitudinal polish rod to make Y-axial movement relative to the moving center. The cross writing and drawing robot can be used for automatically controlling the penholder module to make X-axial movement or Y-axial movement through a control module, as well as writing or drawing by virtue of a pen clamped on the penholder module instead of a person, has the advantages of compact structure, reliable performance, sensitive action, high movement displacement accuracy, long service life and the like, and is suitable for working situations with relatively high repeatability.

The invention discloses a water pollution online analysis and quick source tracing method used for strengthening supervision of wastewater discharged by enterprises in the industries of printing and dyeing, coking, electroplating, electronic manufacturing, papermaking, pharmacy, metal manufacturing and the like. According to the method, a multi-channel laser Raman online analysis and multi-channelelectrochemical online analysis combined technology is adopted to perform online analysis and monitoring on multiple types of pollutants possibly occurring in a monitored water area, and the online analyzed and monitored water pollution data is analyzed automatically by utilizing a pre-constructed pollution source database, source tracing software and a data analysis platform so as to realize online water pollution source tracing. By adopting measures such as multiple test channels, a wide-electrochemical potential window three-dimensional bismuth film alloy electrode, a modulation asymmetricsquare wave test method, a surface enhanced Raman accessory and the like, the test rate, the detection capability and the monitoring resolution capability of online analyzing and testing various types of pollutants are ensured.

The invention discloses a machine vision-based spatial position detection system for automobile wheel planes and rims in the field of automobile industry, and aims to solve the problem that spatial positions of the automobile wheel planes and rims cannot be measured. The system comprises a first camera (1), a first line laser (2), a second line laser (3), a third line laser (4), a laser positioning seat (5), a third positioning bolt (6), a second positioning bolt (7), a first positioning bolt (8), longitudinal bubbles (9), a second camera (10), a camera frame (11), a base (12), transverse bubbles (13) and a bottom plate (14). The detection system can finish non-contact and automatic detection of the spatial positions of the automobile wheel planes and rims.

The invention discloses a light source system and a projector. The light source system comprises a wavelength conversion apparatus, a filtering apparatus and a dodging apparatus. The wavelength conversion apparatus comprises at least two fluorescent areas, wherein different fluorescent areas are provided with different wavelength conversion materials which generate exited light with different wavelength coverage areas; the filtering apparatus is provided with N light processing diaphragms which are successively arranged in the emergent light path of the excited light, wherein a one-to-one correspondence is formed between the light processing diaphragms and the fluorescent areas in the wavelength conversion apparatus; each light processing diaphragm reflects the excited light generated by the fluorescent area in the wavelength conversion apparatus corresponding to the light processing diaphragm to the dodging apparatus, wherein a minimum N is the number of the fluorescent areas of the wavelength conversion apparatus; the light processing diaphragms are curved surface diaphragms. According to the invention, the problem of greater space occupation caused by the loosened structure of a light source system of the prior art is solved.

According to an exemplary embodiment, a method for coupling a mechanical interface unit (34) to a suction ring unit (16) that is held on an eye by suction force comprises a step of bringing the interface unit relatively closer to the suction ring unit in an axial direction, into a first predetermined relative position of the two components that is preferably detected by suitable sensors. When the first relative position is reached, the evacuation of a suction chamber (42) formed between the interface unit, the suction ring unit and the surface of the eye is commenced, the negative pressure produced in the suction chamber establishing a contact between the surface of the eye and an applanation plate (40) held on the interface unit, or increasing the size of a region of existing contact. The sucking of the eye onto the applanation plate prevents the eye from being subjected to compressive and shearing stresses such as those that are often unavoidable when the plate is pressed against the eye.

An optical fiber for laser mode stripping and a laser mode stripper using the same, the optical fiber at least includes: a mode stripped section; the mode stripped section includes: a core; and an inner cladding and an inner cladding sequentially coated outside the core The outer cladding, wherein the inner cladding and/or the outer cladding are processed with a plurality of scattering holes for laser mode stripping, and the optical fiber and laser mode stripper have a good laser mode stripping effect.

The present invention generally relates to a laser processing systems for thermally processing substrates. The laser processing systems include a shield disposed between an energy source of the laser processing system and a substrate which is to be thermally processed. The shield includes an optically transparent window disposed adjacent to a cavity within the shield. The optically transparent window allows annealing energy to pass therethrough and to illuminate the substrate. The shield also includes one or more gas inlets and one or more gas outlets for introducing and removing a purge gas from the cavity within the shield. The purge gas is utilized to remove volatized or ablated components during thermal processing, and to provide a gas of predetermined composition, such as oxygen-free, to the thermally processed area.