398results about How to "Good monochromaticity" patented technology

The invention discloses a laser link communication-measurement composite system. Through adoption of the laser link communication-measurement composite system, the payload weight, size and power consumption can be lowered. The laser link communication-measurement composite system is implemented by the following technical scheme: an optical antenna transmits a comprehensive optical signal to a rapid reflecting mirror through an eye lens at a transmitting end; reflected light splits a light beam of the comprehensive optical signal into two paths through a beam splitter; one path is transmitted into another beam splitter through the beam splitter to transmit the light beam into a coarse tracking module in order to extract a target position coarse miss distance, and a control voltage is applied to a two-dimensional turntable according to an embedded control algorithm; the other path of comprehensive optical signal is introduced into the field range of a fine tracking module through the beam splitter, and transmitted into the fine tracking module to extract a target position fine miss distance, the overall offset of fine field light spots is controlled, the light spots are introduced into the center of a fine tracking field to obtain target angle information, and the extracted target position fine miss distance is transmitted into a ground/satellite platform comprehensive electronic management and processing module to finish target capture and an aiming function and establish a communication link.

This invention discloses a two-phase flow digital particle image speed test method and its device, which uses suitable particles to trace flow of fluids and uses high speed CCD camera to register motion images for tracing particles, liquid drops or gas bubbles, applies an image process method to separate the images of scattered phase particles drops or bubbles from original images and extracts velocities of them from their images and applies an improved cross correlation technology based on quick Fourier transformation to extract the velocity field of the tracing particles to realize the synchronous measurement to the two phase flows with different phase velocity fields. The device includes a HeNe laser, a triple prism and a cylinder lens, a high speed CCD camera, an image collecting card and a control and image process computer.

The invention discloses an ultraviolet fluorescence double-signal water quality monitoring device taking an LED (light emitting diode) as a light source and an application method of the device, and belongs to the field of environmental monitoring and water treatment. The ultraviolet fluorescence double-signal water quality monitoring device taking the LED as the light source consists of a sample collecting part and a detection part. The application method comprises the steps of selecting a deep ultraviolet LED lamp light source with specific wavelength and a photoelectric detector component according to a three-dimensional fluorescence atlas, detecting fluorescence intensity and ultraviolet absorption at the specific wavelength at the same time and calculating a ratio of the fluorescence intensity to the corresponding ultraviolet absorption. According to the device, no chemical reagent is consumed, monitoring of total concentration change of soluble organic matters in a water body can be realized, change of concentration of fluorescence ingredients such as proteins and humus can be reflected at the same time, and the sensitive, quick, efficient, economical, easy and information-rich on-line monitoring device is provided for the water treatment.

The invention provides a preparation method of perovskite quantum dots. The preparation method comprises steps as follows: A), Cs2CO3, oleic acid and octadecene are mixed and subjected to a heating reaction under the condition of protective atmosphere, and a cesium oleate precursor solution is obtained; B), lead halide and octadecene are mixed and subjected to heating and heat preservation under the condition of protective atmosphere, after an oleic acid and oleylamine mixed solution is added and heated to 170-190 DEG C, an obtained mixed solution is mixed and reacts with the cesium oleate precursor solution, and the perovskite quantum dots are obtained, wherein the lead halide is selected from one or more of lead chloride, lead bromide and lead iodide. According to the preparation method, the coordination effect of surface ligands of the perovskite quantum dots of different halide ions directly synthesized at a higher temperature is more remarkable, so that stability and fluorescence quantum efficiency of the synthesized perovskite quantum dots are both guaranteed.

A spectrum measurement system with multi-spectrum section in infrared laser continuous tuning and high-resolution type is prepared as forming near infrared spectrum subsystem by ECDL laser, laser power supply, gas absorption pool, near infrared photoelectric detector, data collection- process circuit and computer; forming intermediate infrared spectrum subsystem by ECDL laser, DFB laser, laser power supply, 1/2 wave plate, beam combination mirror, achromatic glued mirror, PPLN nonlinear crystal, CaF2 lens, Ge filtering plate, non-spherical surface mirror, gas absorption pool, MCT photoelectric detector, etc.

Disclosed is a pole sheet laser cutting machine. It comprises a base frame component, a laser cutting device, a cutting manipulator component for driving the laser cutting device, a control system, and at least one sheet feeding assembly; the sheet feeding assembly comprises a material grabbing manipulator component, a fixed length feeding component and a material releasing component, with both the cutting manipulator component and the material grabbing manipulator component being mounted on the base frame component, the fixed length feeding component being arranged between the material grabbing manipulator component and the material releasing component, and the control system being connected to the cutting manipulator component, the material grabbing manipulator component and the fixed length feeding component. The present invention achieves the sheet making process for lithium ion batteries or super capacitors by applying laser technology, which is able to overcome the problems that existed in the prior art through applying a traditional cutting process so that the pole sheets were easily deformed and the burrs were relatively large, etc., and at the same time, the quality of the sheet making process and hence the rate of acceptable products are improved through the control of the control system.

The invention discloses a terminal forming machine and method for a pole piece of a lithium battery. The terminal forming machine comprises an unwinding component (2), a cutting base plate (20), a laser cutting head (9), a winding component (18) and a control system, wherein the cutting base plate (20) is placed on a pole piece motion path between the unwinding component (2) and the winding component (18), the laser cutting head (9) is arranged over the cutting base plate (20), and the control system is connected with the unwinding component (2), the laser cutting head (9) and the winding component (18) through signals. The terminal forming machine and method have the advantages that the pole producing process quality is remarkably improved, the consistency of a battery cell is guaranteed, the pole producing efficiency is improved, and subsequent handling of the pole producing process is facilitated.

The invention discloses a method for synthesizing quantum dots with uniform size distribution in an aqueous phase, which comprises the following steps: firstly, dissolving amphiphilic high polymers of different varieties into water so as to form regular micelles when the concentration of the high polymers in the aqueous phase is higher than the critical concentration of the high polymers; and reacting a cadmium sulfydryl composite precursor with NaHSe, NaHTe and Na2S or a thiourea precursor in pore paths of the formed micelles to synthetize quantum dots such as CdS, CdSe, CdTe and the like, and forming the quantum dots with the uniform size distribution by utilizing condensation reflux or the growth of the quantum dots in a hydrothermal reaction kettle. The quantum dots synthesized in the aqueous phase completely are good in water-solubility, and thus the quantum dots can be widely applied in biological aspects and can be widely applied to biomarkers, biological labels and probes; and in addition, the quantum dots with the uniform size distribution have excellent monochromaticity of transmitted fluorescence, wide absorption and narrow and adjustable transmitting positions.

The invention relates to a method and a system for making a traffic sign marking. The traffic sign marking comprises a traffic sign and a traffic marking, and also traffic facilities; a laser generator is used for generating laser to form three-dimensional or two-dimensional traffic sign marking, and the laser beam generated by the laser generator can be adjusted to change the traffic sign marking. By adopting the method and the system, the vacant lane in the opposite direction can be utilized to relieve the pressure of traffic jam sections and solve the problem that traffic jam appears in the downtown direction and less cars go in the uptown direction when people go to work, and the traffic jam appears in the uptown direction and less cars go in the downtown direction when people get off work.

The invention discloses a spectrum beam combination device for realizing twice diffraction by using the transmission grating of a plated reflecting film. The spectrum beam combination device comprises a semiconductor laser unit light source, a slow-axis collimated column lens, a conversion lens, a transmission grating and an output coupling mirror. The transmission grating of the back plated reflecting film is used as a diffraction element, namely the reflecting film is plated at the back of a grating surface, so that the dispersive power of the grating can be doubled by an incident beam through the diffraction of the transmission grating twice. According to the spectrum beam combination device, the restriction that the dispersive power of the diffraction grating is limited in traditional spectrum beam combination is overcome, the number of beam combination elements can be increased in the gain line width of the material and the high-efficiency diffraction wavelength range of the grating, and the output power is obviously improved, or the length of a resonant cavity can be shortened when certain output spectrum width is guaranteed, so that the structure of a laser unit is compacter, and the mode of the laser unit is stabler.

The present invention discloses a spectral measurement method via continuous light source and discrete light source, and a measurement instrument for non-invasive detection of human body tissue components. Said instrument includes an incident unit, a probe, a receiving unit and a data processing unit. Said composite spectral measurement method improves or strengthens the output light intensity at the wavelength that carries information of the target component within human body. It enables the spectral detection in the whole wavelength range, and thus significantly enhances the SNR of the detecting system. In the non-invasive detection instrument, light from both the continuous light source and discrete light source can be firstly selectively light-split by AOTF, or AOTF conducts light-splitting for the continuous light source, while the discrete light source LD is controlled by a spatial chopper. When data of the spectral curves achieved from said continuous light source and discrete light source are processed, data acquired under different measuring modes can be compared.

The invention relates to the technical field of photonic crystal fiber sensing, and provides an indoor air quality detecting system having the advantages of small detection range, large flexibility and low cost. A technical scheme adopted in the invention is characterized in that a photonic crystal fiber based mixed gas concentration detecting apparatus is composed of a laser, a single-mode fiber, a coupler, a power meter, an air chamber and a wave meter, and a photonic crystal fiber is wound in the air chamber; the single-mode fiber and the photonic crystal fiber are directly connected in the air chamber by adopting a flange disc, the air chamber is filled with a mixed gas for detection, and the mixed gas goes through the end surface of the photonic crystal fiber in the air chamber, and enters a fiber core air hole area; laser output by the laser is divided into two beams by the coupler, and one of the two beams directly enters the wave meter as reference light; and the other one of the two beams goes through the single-mode fiber, enters the air chamber, interacts with the mixed gas in the hollow core of the photonic crystal fiber, is coupled into the other segment of the single-mode fiber, and is connected to the power meter. The system and the apparatus are mainly used for the gas detection.

The invention relates to a method for rapidly preparing a water-soluble quantum dot by an ultrasonic spraying method with continuous production, which comprises the following steps that: cadmium ions or zinc ions and hydrogen (or selenide) telluride or sodium hydrogen telluride (or selenide) react to obtain a precursor solution of cadmium (zinc) telluride (selenide) through the complexation of a mercapto compound. An ultrasonic atomizer is used to atomize the precursor solution to form fogdrops of the precursor solution, and the fogdrops flow through a device with constant temperature to react to obtain the water-soluble quantum dot. The method has the advantages of high speed and continuous quantum dot production, the prepared quantum dot has high fluorescence quantum yield (between 20 and 50 percent), and good monochromaticity of luminescence (the peak width at half height of a fluorescence spectrum within the range of visible light is between 30 and 40nm), and the size of nano-particles can be easily controlled by changing the temperature and flow rate, thereby realizing the adjustment to luminescence peak positions (between 400 and 700nm).

This invention relates to high stable energy filtration digital microscopic imaging receives method and its equipment. It belongs to energy filtration digital microscopic imaging technique field. Drift detection feedback method is used to eliminate the drift of different energy digital space distribution to energy selecting crack caused by high voltage fluctuation or interference of electromagnetic wave. So the energy filtration receive device can keep the filtrated electron energy stable all the time during signal acquisition process. Then energy selecting crack width is adjusted to make energy segment that contain sample excitatory feature spectrum information. So the high space distinguishing and high energy distinguishing energy filtration image can be got after accumulation.

The invention belongs to the field of power systems, and relates to a power transmission line laser external force damage prevention monitoring and early warning device. All-weather monitoring is performed in the region of frequent construction, high number of trees in the passage and frequent human and animal activities outside the power transmission line by using laser detection and the camera video transmission device based on the laser intelligent detection technology and the image monitoring technology through combination of the characteristics of the power transmission line, and the external damage hidden trouble can be warned in the early stage and discovered in time and eliminated so that the failure trip rate of the power transmission line can be reduced and the reliability of thepower transmission line can be enhanced. The actual demand of the present high voltage power transmission line and tower safety monitoring can be greatly met so that the power transmission line inspection efficiency can be effectively enhanced, and powerful guarantee can be provided for enhancing the modern management level of the high voltage power transmission line of the power industry.

The invention discloses gas metering monitoring device and monitoring method. The device comprises a laser, a signal detector, a laser control module, a signal processing module, a data analysis module and a sample room, wherein the laser control module is connected with the laser and is used for driving the laser to transmit laser light with a specified wavelength to a sample gas in the sample room; the signal detector is used for acquiring a transmission signal passing through the sample gas in the sample room and sending the transmission signal to the signal processing module; the signal processing module is used for converting the transmission signal into the absorption spectrum of gas to be tested; and the data analysis module is used for analyzing the absorption spectrum of the gas to be tested to obtain the information of the gas to be tested. The metering monitoring scheme can not be influenced by moisture, dust and other factors and can increase the metering monitoring accuracy of the gas to be tested.

The invention discloses a double-flexible-cantilever-beam vibration measurement and control device and method based on laser binocular vision. The device comprises two flexible cantilever beams connected in series. The flexible cantilever beams are provided with piezoelectric ceramic drivers, piezoelectric ceramic sensors and accelerometers. The device also comprises a line laser, an industrial camera, a servo motor and a planetary speed reducer. The line laser generates a laser light resource, and combined with the industrial camera, in a complete non-contact mode, the bending vibration of the cantilever beams is detected. The speed of the servo motor is reduced by the planetary speed reducer, and the servo motor is used for controlling the rotation of the cantilever beams, receiving a vibration suppression signal obtained by a vibration control algorithm and suppressing the vibration of the cantilever beams at the same time. The device can be used for the vibration measurement and control of a space flexible joint, laser is used as the light resource without the affection of sun light, thus the working stability is maintained, and a reference is provided for the vibration measurement and vibration suppression of a flexible aerospace structure.

The invention discloses a dye and liquid crystal co-doped light source device-based novel tunable method. The method comprises the following steps of: performing orientation treatment on in-plane switching (IPS) glass base plates, wherein the friction direction of upper and lower glass base plates is antiparallel to a manufacturing liquid crystal box; uniformly mixing chiral liquid crystal and dye according to the proportion, heating until an isotropic phase is formed, and injecting into the liquid crystal box under the capillary action; and exciting the device by using laser of a certain wave band, applying an alternating current electric field to an IPS electrode, and allowing the light source of the device to perform wavelength tuning in the wave band of visible light by changing an additive electric field. The method has the advantages that: 1, the device has a tiny volume and high integrated level; 2, the luminous mechanism of the light source device is multiple scattering of random laser, so that monochromaticity of the light source and the luminance are high; and 3, the luminous wavelength of the light source device can be continuously tuned under the action of the electric field.

A process for preparing the RE match microcapsules with high optical effect includes such steps as choosing a main luminous body from Eu(III) beta-biketone matches Eu(acac)3Phen, Eu(TFA)3Phen, Eu(HFA)3Phen, Eu(TTA)3Phen, Eu(DBM)3Phen and Eu(PTA)3Phen, preparing the solid microcapsule whose shell layer contains said RE matches, and preparing the hollow microcapsules whose shell contains RE matches by dissolving the central core.

The invention relates to a preparation method of an adjustable luminescent CsPb2Br5 nanosheet, a product and application thereof. The preparation method comprises the following steps: under nitrogen protection, mixing cesium stearate, octadecene and oleic acid to prepare a caesium oleate solution; additionally, mixing lead bromide, octadecene, octylame and oleic acid, heating and stirring to obtain a PbBr2 precursor solution; and then adding the caesium oleate solution into the PbBr2 precursor solution, mixing and stirring to obtain the CsPb2Br5 nanosheet. Different sizes of CsPb2Br5 nanosheets are obtained by regulating and controlling the reaction temperature of preparing the PbBr2 precursor solution to be 100 to 140 DEG C, and the photoluminescence gradually changes into green light from blue light. The obtained CsPb2Br5 nanosheets can be used for preparing light-emitting diodes, solar cells or photoelectric detectors, and the light-emitting efficiency of high-monochromaticity green light LEDs constructed by preparing the CsPb2Br5 nanosheets reaches 34.49 lm/W.

A dynamic monitor of landslide or collapse is composed of laser device, the units installed on the base of said laser device as horizontal regulator, horizontal level meter, damper and microscope forreceiving the light reflected from the object to be monitored, the collimator, movable beam diffuser and deflector in the optical channel of laser device, the optical sensor and amplifier in the optical channel of microscope, spectral analyzer, and computer. It can forcast the generation of landslide and collapse earlier.

The invention relates to a nanometer material with magnetism and rare-earth luminous performance and a preparation method. An improved St ber method and a technique of layer-by-layer assembly are adopted, the nanometer particles of ferroferric oxide with superparamagnetism are coated by silicon dioxide, then Tb complex is covalently grafted on the surface of magnetic silicon dioxide nano-sphere to be a bifunctional material with both the magnetic and optical characteristics, and the synthesis and application of the bifunctional fluorescence probe are provided with a beneficial research foundation, the controllability of the recovery of the bifunctional fluorescence probe is improved due to the magnetism of the material. The more probability of surface functionalization and application of bifunctional particles is allowed because the outermost layer of the nanometer material is covered with a thin layer of silicon dioxide.