14 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.

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.

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.

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 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 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.

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.