23 results about "Laser light scattering" patented technology

Provided is a laser scattered light measuring device capable of easily confirming the safety of laser scattered light to a human body. The laser scattered light measuring device includes a light receiving unit, a calculation unit, and a display unit. The light receiving unit receives laser scattered light generated by irradiating an object with laser light and detects intensity of the laser scattered light. The calculation unit compares the intensity of the laser scattered light received by the light receiving unit with a predetermined threshold value and calculates a degree of risk of the laser scattered light to a human body based on a comparison result. The display unit displays the degree of risk calculated by the calculation unit.

The invention relates to the technical field of pharmaceutical analysis, in particular to a method for determining the absolute molecular weight of recombinant human thrombopoietin. According to the method, the absolute molecular weight of the recombinant human thrombopoietin is measured by combining volume exclusion chromatography with a multi-angle laser scattering method. The method is simple and rapid in operation, can reduce the workload of manual operation and data processing, and is high in detection efficiency. The method is suitable for detection or quality control of recombinant human thrombopoietin products.

A method of making a readout mirror for a ring laser gyroscope comprises forming an optical substrate component that includes a lower surface, a first upper surface portion substantially parallel to the lower surface, and a second upper surface portion angled with respect to the lower surface; performing a coarse polish of the second upper surface portion; forming an optical part having a first surface; performing a super polish of the first surface of the optical part; applying a first beam splitter layer to the super polished first surface of the optical part, to produce a beam splitter side of the optical part; and bonding the beam splitter side of the optical part, using an optical adhesive, to the coarse polished second upper surface portion of the substrate component, to produce a reflector member. The reflector member is configured to reduce external cavity light scattering in the ring laser gyroscope.

The invention discloses an SF6 multi-component mixed gas liquefaction temperature detection method and system based on a laser scattering method. The system comprises a high-pressure visual cavity, a temperature and pressure control system, a laser light source, an optical signal detection system and a data acquisition and processing unit. The design of the high-voltage visual cavity simulates the working condition of actual electrical equipment, and the measurement result has higher engineering reference value; non-contact measurement is realized by means of optical detection, and subjectivity of manual observation in a traditional method is avoided; the automatic data processing flow improves the measurement efficiency and repeatability, and is especially suitable for continuous monitoring requirements of multi-element mixed gas. The method provides a reliable technical scheme for solving the practical problem of SF6 mixed gas liquefaction temperature monitoring in power equipment.

The present invention provides a novel technique capable of evaluating the shape of a semiconductor substrate. The present invention comprises a quantification step for quantifying a shape feature of a semiconductor substrate on the basis of: a main surface scattered light intensity measurement value obtained by measuring the intensity of scattered light as a result of scattering of laser light that entered from the main surface of the semiconductor substrate; and a back surface scattered light intensity measurement value obtained by measuring the intensity of scattered light as a result of scattering of laser light that entered from the back surface of the semiconductor substrate.

The invention provides a method for separating, quantitatively characterizing and recycling soil rare earth nano colloid. The method comprises the following steps: weighing a soil sample, settling the soil sample, and collecting particles with the particle size of less than 1000nm in a soil colloid solution. The soil nano-colloid is separated and characterized by combining an asymmetric flow field flow instrument, a multi-angle laser light scattering instrument and an inductively coupled plasma mass spectrometry, and a characterization result is obtained. According to the method, various instruments are combined, so that the rare earth nano colloids with different particle sizes are accurately and effectively separated and represented. And setting a plurality of recovery time periods according to the characterization result, and recovering the rare earth nano colloids with different particle sizes in different recovery time periods. And according to a quantitative characterization result, the rare earth nano colloid with the target particle size is precisely recycled in a targeted manner by utilizing an asymmetric flow field flow instrument. According to the method, not only can the nanoscale rare earth colloid of 5-70 nm be efficiently recycled, but also the submicron rare earth colloid of 300-350 nm can be effectively recycled, and the recycling efficiency is high.

The application discloses a kind of shipborne marine aerosol monitoring platform device and use method, platform device includes ship body, monitoring cavity is equipped on the deck of ship body, the outlet end of gas inlet pipe is vertically extended from the top end of monitoring cavity into monitoring cavity, laser diode is fixed in the right part of monitoring cavity, probe diode is fixed in the upper part of monitoring cavity and scattering mirror is fixed in the lower part, laser diode is used to emit laser to aerosol particle in air sample, scattering mirror is used to reflect the scattering light emitted by aerosol particle under the action of laser to probe diode, probe diode is used to receive scattering light and convert into electric pulse, and the number of aerosol particles in certain particle size section in air sample in monitoring cavity in certain time period is calculated.The application can obtain the number concentration of aerosol particles in open sea moving air source, and the spatial resolution of monitored aerosol particle number concentration is higher.

This invention provides a particulate matter concentration measuring device and method. The device includes: a light-emitting unit; a first laser light-transmitting window for isolating the light-emitting unit from the airflow to be detected while ensuring light transmission; a light trapping unit; a second laser light-transmitting window for isolating the light trapping unit from the airflow to be detected while ensuring light transmission; a main photoelectric sensor for measuring the particulate matter concentration by detecting laser light scattered by particulate matter in the airflow to be detected; a main photoelectric sensor light-transmitting window for isolating the main photoelectric sensor from the airflow to be detected while ensuring light transmission; a cleaning brush component for cleaning the first laser light-transmitting window, the second laser light-transmitting window, and the main photoelectric sensor light-transmitting window; and a fan for providing forward and reverse airflow. This invention effectively achieves efficient and low-cost cleaning of the particulate matter concentration measuring device.

This invention discloses a glass bubble detection system and method based on orthogonal laser scattering, which relates to the field of industrial machine vision technology. It includes: a conveying device for carrying the glass to be tested and moving it along... Z Uniformly moving along the axial direction; a line laser emitting unit, used to generate a laser perpendicular to the upper surface of the glass under test and perpendicular to the axis. Z shaft and X The invention comprises a planar sheet-like laser light curtain formed by an axis; a side-viewing imaging unit for acquiring images of the laser scattering spot as the glass under test passes through the sheet-like laser light curtain; and a central processing unit for controlling the synchronous triggering of the transmission device and the side-viewing imaging unit, and processing the laser scattering spot images to identify bubble defects inside the glass under test. This invention solves the problem of traditional transmission methods being unable to obtain depth information, significantly improving the positioning accuracy of microbubbles and the accuracy of defect classification.

The invention provides a quantitative detection method of vesicular stomatitis virus and application thereof, and the method comprises the following steps: separating a sample solution containing vesicular stomatitis virus by using a size exclusion high performance liquid chromatograph, and detecting and analyzing by using a multi-angle laser light scatterometer to obtain the particle concentration of vesicular stomatitis virus; a mobile phase of the size exclusion high performance liquid chromatography comprises a buffer solution, inorganic salt and a stabilizer. According to the method, the size exclusion high performance liquid chromatography and the multi-angle laser light scattering technology (SEC-MALLS) are combined, the particle concentration of the vesicular stomatitis virus (VSV) can be accurately and efficiently quantified, the measured virus particle number and the dilution multiple have better correlation, the virus particle number and the virus titer have high correlation, and the accuracy and the accuracy of the detection result are improved. The method can be used for accurately reflecting the infection activity titer of the virus, has higher accuracy, and can be widely applied to basic research of the virus and quality control of vaccines.

This invention discloses a method and system for processing ultraviolet laser scattering channel data based on massive MIMO, belonging to the field of data measurement technology. The method includes: acquiring a source sequence and encoding the source sequence into a bipolar array; acquiring a real-time temperature value and calculating an offset based on the real-time temperature value; shifting the bipolar array to the positive real number domain based on the offset to obtain a unipolar array; outputting an optical signal based on the unipolar array; acquiring the received signal after the optical signal is transmitted through the scattering channel and acquiring the corresponding channel matrix; acquiring a real-time dark current and updating a mask matrix based on the comparison result of the real-time dark current and a preset threshold; correcting the channel matrix based on the mask matrix to obtain an effective matrix; and performing multipath combining and interference suppression on the received signal based on the effective matrix to obtain target data. This invention has the advantages of adaptability, high security, and high robustness.

The invention discloses a wafer detection system and a wafer detection method. The wafer detection system comprises a first laser module, a second laser module, a shading module, a scattering module and a control module, the first laser module is used for emitting first laser light to a wafer to be detected; the second laser module is used for emitting a second laser ray to the wafer to be detected; wherein the power of the first laser light is greater than that of the second laser light; the shading module is arranged on a propagation path of the first laser light and is used for shading the first laser light; the scattering module is used for receiving the first laser light scattered by the defect particles on the wafer to be detected and generating a first detection signal, and receiving the second laser light scattered by the defect particles and generating a second detection signal. According to the technical scheme, the first laser light is used for detecting small particle defects, the second laser light is used for detecting large particle defects, the detection range is enlarged, meanwhile, light switching is rapidly achieved through the shading module, and the detection efficiency is guaranteed.

The present application relates to combustion experiment measurement technology, aims at providing a turbulent constant volume bomb flame speed measuring device based on laser Mie scattering. The device comprises a turbulent constant volume bomb, an ignition needle, an ignition control system, an oil droplet generator, a high-speed laser, a lens group, a high-speed camera and four fan motor assemblies; four fan shaft interfaces are arranged on the spherical cavity and are connected to form a regular tetrahedron; the high-speed laser and the lens group are arranged outside an optical window in sequence, and the high-speed camera is arranged outside another optical window; the high-speed camera and the high-speed laser are connected to a delay generator through signal lines respectively. The present application can simulate the combustion experiment of the coupling of turbulent flame and chemical reaction under the isotropic uniform turbulent flow field, realize the isotropic turbulent flow field with different intensities, and is used for studying the interaction of the coupling of turbulent flame and chemical reaction under different turbulent intensities and the influence on the flame propagation speed.

The invention relates to the technical field of optical detection, and discloses a Mie scattering theory-based laser particle size inversion method, which comprises the following steps of: constructing a laser scattering measurement system which comprises a laser light source, a sample cell, an optical collimation assembly, a scattered light collection assembly and a photoelectric detection assembly, monochromatic laser emitted by the laser light source is processed by the optical collimation assembly to form parallel light beams which are incident to a particle sample in the sample cell, and the light beams and the particle sample interact to generate scattered light. Scattered light collection assemblies distributed in an annular array are adopted to cover forward, lateral and backward multiple scattering angles, and a Vondrak smoothing algorithm is combined to carry out noise filtering and baseline correction preprocessing, so that the integrity and purity of scattered light signal collection are improved, and the interference of ambient light, circuit noise and background light on signals is effectively reduced. And accurate data support is provided for subsequent correlation model construction, so that the accuracy of a particle size inversion result is improved.

A method for inspecting an ophthalmic lens for the presence of an unacceptable semi-opaque defect in a lens body thereof comprises the steps of: illuminating the lens body with laser light in an area bounded by an edge of the lens body; detecting the intensity of laser light scattered by the illuminated lens body in a predetermined detection direction which is different from a direction of reflection; comparing the detected intensity of the scattered laser light with a predetermined threshold intensity; determining a size of at least one coherent area in which the detected intensity of the scattered laser light is higher than the predetermined threshold intensity; determining whether the size of the at least one coherent area is larger than a predetermined threshold size, and rejecting the ophthalmic lens in case the size of the at least one coherent area is larger than the predetermined threshold size.

Provided is a technique for more appropriately inspecting an anisotropic object in a substrate using a laser light scattering method. For each measurement region on the surface of the substrate, respective scattered light is measured using an optical system located in a first direction and a second direction with respect to the measurement region to obtain first measurement data and second measurement data, and the first measurement data and the second measurement data are synthesized to generate synthesized data.

The invention discloses an optical fiber temperature measurement method and an optical fiber temperature measurement device. The optical fiber temperature measurement method comprises the steps that a laser delay signal is generated in response to a temperature measurement instruction, the laser delay signal comprises a plurality of delay parameters, and the delay parameters are time delay parameters or phase delay parameters; according to the multiple delay parameters, delay collection is conducted on the laser scattering signals, multiple signal sequences are obtained, each signal sequence comprises the laser scattering signals collected under the corresponding delay parameters, and the laser scattering signals are scattered light signals generated by the temperature measuring optical fiber after pulse laser is injected into the temperature measuring optical fiber; sorting the laser scattering signals in the plurality of signal sequences according to the sampling time point of each laser scattering signal in the plurality of signal sequences to obtain a target signal sequence; and analyzing the target signal sequence, and determining the optical fiber temperature of the temperature measurement optical fiber. According to the scheme provided by the embodiment of the invention, the spatial resolution of the optical fiber temperature measurement system can be improved, and the cost of the optical fiber temperature measurement system is reduced.

The invention discloses a flexible laser scattering detection device and an operation method and application thereof, light output by a laser is converted into linearly polarized light, laser mobile scanning is controlled through a scanning galvanometer, so that a damaged area is accurately scanned, transmission of an image signal is completed through a polarization maintaining optical fiber bundle, and the detection precision is improved. After the linearly polarized light is subjected to multiple scattering in the subsurface damage area, the polarization state of the linearly polarized light can be changed. The detection of the subsurface damage is realized by measuring an optical signal of which the polarization state is changed; and meanwhile, the surface roughness of the sample to be detected does not influence the subsurface detection signal. The expansion of an imaging view field is realized by means of regulation and control of the piezoelectric scanning module, and finally, high-resolution subsurface damage imaging is completed by the image processing system. The detection device can be embedded into a machine tool system, high-precision in-situ measurement of a complex profile component is achieved, and real-time online monitoring of the machining process is supported.

The utility model discloses a laser light scattering device based on extracorporeal blood viscous flow condition simulation, which is characterized in that a liquid inlet of a first pulse pump is connected with a liquid outlet of a human body blood circulation model, a liquid outlet of the first pulse pump is connected with a liquid inlet pipe of a sample pipe, and a liquid outlet of the liquid inlet pipe of the sample pipe extends to one side of the bottom of an inner cavity of the sample pipe; a liquid outlet of the second pulse pump is connected with a liquid inlet of the human body blood circulation model, a liquid inlet of the second pulse pump is connected with a liquid outlet pipe of the sample pipe, and a liquid inlet of the liquid outlet pipe of the sample pipe extends to the other side of the bottom of the inner cavity of the sample pipe; the inner wall of the sample tube is coated with a layer of biological membrane for simulating vascular endothelial cells, and the sample tube can be horizontally fixed on a sample position of the laser light scatterometer; the pulse pump flow speed adjusting display screen is connected with the first pulse pump and the second pulse pump. By simulating the dynamic and static flowing conditions of human blood, the dynamic and static laser light scattering test of a flowing sample is realized, so that more accurate experimental data is obtained.

The utility model relates to the field of flow cytometry and fluorescence collection, in particular to a fluorescence collection device for a flow cytometry, which comprises a flow cell, a collection component, a light splitting component and a detection component, the flow cell is used for guiding and focusing the fluorescence-labeled test particles; the collecting assembly is used for collecting fluorescent light and scattered light excited by laser irradiating the central particles of the flow cell; the light splitting assembly is used for dispersing multiple kinds of fluorescence collected by the collection assembly to different receivers through the long-pass optical filter, the dichroscope and the band-pass optical filter, and the detection assembly is used for measuring fluorescence signals collected on the receivers. The first long-pass optical filter is placed behind the receiving lens to suppress the short-wavelength laser scattering light on the test particles, so that the requirement of all optical filters on the suppression capability of short-wavelength exciting light is reduced, and then the second long-pass optical filter is used for suppressing the long-wavelength laser scattering light on the test particles, so that the suppression capability of all optical filters on the short-wavelength exciting light is reduced. And the requirements of all optical filters on the inhibition capability of the long-wavelength exciting light are reduced.

To provide a nanobubble-containing water evaluation device capable of evaluating the size of nanobubbles in nanobubble-containing water.SOLUTION: A nanobubble-containing water evaluation device comprising a container (11) for storing nanobubble-containing water, an irradiator (12) for irradiating the container (11) with laser light to form an optical path (L) in the nanobubble-containing water, an image sensor (13) for capturing an image of the optical path (L) to generate image data, and an analyzer (14) for determining nanobubbles in the nanobubble-containing water using the image data, the analyzer (14) generates, from the image data, frequency data of a luminance value of scattered light of the laser light generated by the nanobubbles or frequency data of an emission area of the scattered light, and evaluates the size of the nanobubbles in the nanobubble-containing water.SELECTED DRAWING: Figure 1

The present invention relates to an electrode comprising an electrode active material, and a synthetic graphite additive, wherein the synthetic graphite additive has: a through-plane thermal conductivity of at least about 10 W / (m･k); and a d90 / d10 particle size ratio of at most about 8, wherein the particle size is measured by laser light scattering. The present invention further relates to a method of producing and using such an electrode, and a battery comprising such an electrode.

A wind observation device (3) is configured so as to be provided with: a reception signal acquisition unit (31) that acquires reception signals of scattered light from a conical scanning sensor (1) that repeatedly emits laser light toward a wind observation region and receives scattered light of the laser light scattered by an aerosol present in the wind observation region; and a signal integration unit (32) that uses a frequency shift amount corresponding to each of a plurality of mutually different wind vectors to shift the frequency of each of the received signals acquired by the received signal acquisition unit (31), and integrates the spectrum of the plurality of frequency-shifted received signals with respect to each of the wind vectors. Furthermore, the wind observation device (3) is provided with a wind vector selection unit (33) that selects a wind vector corresponding to the wind vector in the wind observation region from the plurality of wind vectors on the basis of the spectrum of the received signals integrated by the signal integration unit (32) for each wind vector.