| Class / Patent application number | Description | Number of patent applications / Date published |
|---|
| 356336000 | By particle light scattering | 65 |
| 20080246963 | PARTICLE COUNTING METHOD - A particle counting method is provided whereby a liquid sample is radiated by a laser light, scattered light produced by causing the laser light to hit a particle in the liquid sample is detected by a photoelectric conversion element, and a sample value which is the output of the photoelectric conversion element is sequentially compared to a threshold preset for each particle size range, thereby counting the number of particles for each particle size range, the method comprising: a timer start-up step for starting a timer of a predetermined time when the sample value becomes smaller than a threshold of a minimum particle size for the first time and for sequentially holding the maximum value of the sample value; and a timer extension step for restarting the timer to sequentially hold the maximum value of the sample value when the sample value at the time-out of the timer start-up step is larger than the threshold of the minimum particle size. | 10-09-2008 |
| 20080246964 | Method and Its Apparatus for Inspecting Particles or Defects of a Semiconductor Device - Conventionally, a particle/defect inspection apparatus outputs a total number of detected particles/defects as the result of detection. For taking countermeasures to failures in manufacturing processes, the particles/defects detected by the inspection apparatus are analyzed. Since the inspection apparatus outputs a large number of detected particles/defects, an immense time is required for analyzing the detected particles/defects, resulting in a delay in taking countermeasures to a failure in the manufacturing processes. In the present invention, an apparatus for optically inspecting particles or defects relates a particle or defect size to a cause of failure in an inspection result. A data processing circuit points out a cause of failure from the statistics on the inspection result, and displays information on the inspection result. A failure analysis is conducted by setting a threshold for identifying a failure in each of regions on a semiconductor device or the like to statistically evaluate detected particles. | 10-09-2008 |
| 20080278725 | Compact, low cost particle sensor - A compact, low cost particle sensor utilizing a photodetector ( | 11-13-2008 |
| 20090002704 | Systems and methods for remote monitoring of contaminants in fluids - A system and method of monitoring contaminant particles in pipelines. The system can include a probe for extending into a pipeline, and sampling fluid in the pipeline to ensure that a representative amount of contaminants within the pipeline can subsequently be measured. An analyzer receives the sampled fluid from the probe, illuminates the sampled fluid with a light source, and collects scattered light from any contaminant particles in the illuminated sampled fluid. A detector receives the scattered light from the analyzer, and converts the scattered light into an electrical signal that is proportional to the contaminant particles size. A processor receives the electrical signal from the detector, converts the electrical signal into digital data pertaining to the contaminant particles, and transmits the digital data on an Ethernet connection, or wireless signal to a communication network for distribution to at least one digital data processor for display and evaluation. | 01-01-2009 |
| 20090021734 | APPARATUS AND METHOD FOR DETECTING SUSPENDED PARTICLES - An apparatus for detecting suspended particles, includes a laser source configured to emit a beam of laser light, a diameter expander configured to expand the diameter of the beam, and a distributor configured to distribute the laser light in a sheet-like space, the distributor varying the traveling direction of the laser light in continuous directions at a fixed angle with respect to a reference axis. | 01-22-2009 |
| 20090033934 | DROPLET FORMATION APPARATUS AND METHODS FOR FORMING DROPLET AND CALIBRATING PARTICLE SIZE MEASUREMENT APPARATUS - A droplet formation apparatus is provided for calibrating a particle size measurement apparatus. A vessel stores sample liquid. A pressure unit applies predetermined pressure to the sample liquid in the vessel. An oscillator is provided to one surface of the vessel for applying oscillation, which has a predetermined frequency, to the sample liquid in the vessel. An orifice is provided to an other surface of the vessel. The orifice has at least one discharge hole. The orifice is configured to form a droplet, which has a predetermined particle size, from the sample liquid and configured to discharge the droplet in accordance with the predetermined pressure and the predetermined frequency applied to the sample liquid in the vessel. | 02-05-2009 |
| 20090073438 | PARTICLE SIZE DISTRIBUTION MEASURING DEVICE - This invention may measure the sprayed particle sprayed from the nozzle safely with the use of a conventional particle size distribution measuring device The particle size distribution measuring device may measure particle size distribution of a particle group, and may include a device body comprising a light source that irradiates light on the particle group and a light detector that detects intensity of diffracted light or/and scattered light generated by irradiation of the light, a spray measuring system that introduces a sprayed particle group as being the particle group sprayed from a nozzle into a measuring area between the light source and the light detector , and an ordinary measuring system that arranges a measuring cell that accommodates an ordinary particle group as being a particle group other than the sprayed particle group between the light source and the light detector are arranged to be exchangeable for each other. | 03-19-2009 |
| 20090079981 | LASER-BASED APPARATUS AND METHOD FOR MEASURING AGGLOMERATE CONCENTRATION AND MEAN AGGLOMERATE SIZE - Apparatuses, methods, and systems for measuring mean particle size and concentration of a polydispersion of agglomerates are disclosed. In one embodiment, the apparatuses include a light source; a focusing lens to form a probe volume; a first light detector positioned at a first angular position from the beam of light; and a second light detector positioned at a second angular position from the first direction of the beam of light, the mean particle size and concentration being determined using nearly invariant functions of a ratio of the light scattered measured by the first and second detectors. | 03-26-2009 |
| 20090091756 | CORRELATOR - In order to improve an accuracy of an autocorrelation function, a correlator comprises a counter | 04-09-2009 |
| 20090128810 | SYSTEM AND METHOD FOR CALIBRATION VERIFICATION OF AN OPTICAL PARTICLE COUNTER - Described herein is a portable, low power consuming optical particle counter calibration verification system and reliable and sensitive methods for verifying the calibration status of a gas or liquid particle counter. The calibration verification systems described herein are useful for quickly determining the calibration status of an optical particle counter at its point of use, as well as for allowing the end user to determine if an optical particle counter is in need of a recalibration before the recommended calibration schedule suggests. | 05-21-2009 |
| 20090190128 | Particle Counter With Improved Image Sensor Array - A particle counter for optically detecting an unconstrained particle of less than one micron in size suspended in a flowing liquid includes a sample chamber having a fluid inlet and a fluid outlet; a laser module producing a laser beam; a beam shaping optical system providing a multiple laser beam pattern in the sample chamber; and a CMOS optical detector located to detect light scattered by the particles in the sample chamber. The particle counter has a particle sensing area within the sample chamber in which the intensity of light is at least 10 Watts/mm | 07-30-2009 |
| 20090213372 | METHOD AND APPARATUS FOR MEASURING PARTICLE SIZES IN A LIQUID FIELD OF THE INVENTION - The invention relates to processes for measuring and controlling particle sizes in micro- and nanoemulsions, colloidal solutions and suspensions of particles in liquids and gases. The invention is applicable in chemical processes, in particular, in petrochemistry, transportation of petroleum products, oil and gas, in food and medical industries, medical research, for producing nanoparticles for electronic and electrical industry, controlling the state of operating fluids in mechanical and power engineering, i.e. for controlling the processes for producing or using colloidal solutions, emulsions and suspensions of solid or liquid particles. | 08-27-2009 |
| 20090219530 | NON-ORTHOGONAL PARTICLE DETECTION SYSTEMS AND METHODS - Described herein is a particle detection system capable of spatially resolving the interaction of particles with a beam of electromagnetic radiation. Using a specific electromagnetic beam cross sectional shape and orientation, the detection sensitivity of a particle detection system can be improved. Also provided are methods for detecting and sizing particles in a manner that has low background signal and allows for spatially resolving the scattering or emission of electromagnetic radiation from particles. | 09-03-2009 |
| 20090251695 | OPTICAL MEASURING DEVICE - Within a container | 10-08-2009 |
| 20090251696 | Light scattering measurements using simultaneous detection - Methods and apparatus for measuring particle characteristics are disclosed. In one aspect, an amount of light arising from interaction between light and a suspended sample is detected simultaneously with the acquisition of a photon count from a different direction. At least one measure of particle characteristics can then be derived based at least in part on timing between information from the steps of acquiring and detecting. | 10-08-2009 |
| 20090323061 | Multi-color hetereodyne interferometric apparatus and method for sizing nanoparticles - A nanoparticle sensor is capable of detecting and recognizing single nanoparticles in an aqueous environment. Such sensor may find applications in broad areas of science and technology, from the analysis of diesel engine emissions to the detection of biological warfare agents. Particle detection is based on interferometric detection of multi-color light, scattered by the particle. On the fundamental level, the detected signal has a weaker dependence on particle size (ΓΏ R | 12-31-2009 |
| 20100007879 | SYSTEMS AND METHODS FOR IN-LINE MONITORING OF PARTICLES IN OPAQUE FLOWS - Systems and methods are disclosed for particle monitoring. An exemplary method includes confining a flowable sample which is opaque to at least a first range of wavelengths of light waves; measuring transparency of the flowable sample; compressing the flowable sample in a first direction while confining the sample in a second direction parallel to a flow direction of the flowable sample and orthogonal to the first direction, while elongating the sample in a third direction orthogonal to the first and second directions. When the sample is compressed in the first direction, the sample becomes transparent to at least one of the wavelengths in the first range of wavelengths, and the method can include identifying characteristics of particles contained in the sample which has been compressed. | 01-14-2010 |
| 20100149532 | METHOD AND APPARATUS FOR OPTICAL MEASUREMENT - In the case of generating a diffraction grating resulting from the density distribution of particles by applying a spatially periodic electric field to a sample having particles dispersed movably in a medium, measuring diffracted light obtained by exposing the diffraction grating to a parallel light flux, and calculating the diffusion coefficient and/or size of the particles from the temporal change in the intensity of the diffracted light, the diffraction grating is exposed to multiple types of parallel light fluxes having mutually different wavelengths simultaneously or sequentially, the diffracted light is measured separately for each wavelength, and the measurement results are used selectively for calculation of the diffusion coefficient and/or size of the particles, and whereby the measurement can be carried out accurately without being affected by a plasmon resonance phenomenon even for metal particles. | 06-17-2010 |
| 20100165341 | Compact Detector For Simultaneous Particle Size And Fluorescence Detection - A particle detection and classification system is disclosed. The system determines the size of measured particles by measuring light scattered by the particles. The system simultaneously determines whether measured particles are biological or non-biological by measuring fluorescent light from the particles. The system uses a parabolic reflector, and optionally, a spherical reflector to collect fluorescence light. | 07-01-2010 |
| 20100165342 | OPTICAL MEASUREMENT APPARATUS AND ELECTRODE PAIR THEREOF - In an apparatus in which an electrode pair formed of two electrodes including multiple mutually parallel linear electrode pieces is provided in a container for storing particles dispersed movably in a medium to form an spatially regularly arranged electric field, the particles are migrated in the container due to the formation of the electric field by the application of a voltage to the electrode pair to generate a diffraction grating resulting from density distribution of the particles, diffracted light obtained by applying light to the diffraction grating is measured, and a particle size analysis or the like is performed from the temporal change in the diffracted light in the free diffusion process of the particles by stoppage or modulation of the application of the voltage, by making width L of the electrode pieces of the electrode pair and a space distance S between the electrode pieces as follows: | 07-01-2010 |
| 20100177311 | APPARATUS FOR MEASURING NANOPARTICLES - A dielectric sheet | 07-15-2010 |
| 20100220323 | METHOD AND SYSTEM FOR IN SITU AEROSOL THERMO-RADIOMETRIC ANALYSIS - Particle detection systems configured to identify a particle included in a bulk sample volume are less efficient than if measurements are to be taken of a single particle. An embodiment of a particle detection system according to an embodiment of the present invention capable of determining an identification of a particle in a fluid stream is presented. The detection system may employ one or any number of heating stations. Each heating station may be set to a distinct temperature. The heating stations may include a light source and a light detector, such that once a particle traverses a beam provided by the light source, the light detector may measure resultant optical scattering. Based on the optical scattering with respect to temperature or temperature variation, an identification of the single particle may be obtained, thereby eliminating measurement inaccuracies associated with bulk sample volumes. The particle detection system may be applied to detection of organic particles among inorganic particles in various fluid flow environments, such as for safety or quality purposes. | 09-02-2010 |
| 20100225912 | APPARATUS FOR THE QUALITY CONTROL OF NOZZLES - An apparatus and method for measuring spray angle, spray uniformity, and spray velocity using laser sheet tomography includes measuring the extinction image formed by a spray in two laser sheets spaced apart by a know distance. | 09-09-2010 |
| 20100231909 | METHODS AND APPARATUS FOR DETERMINING PARTICLE CHARACTERISTICS BY MEASURING SCATTERED LIGHT - An apparatus and method for determining characteristics of particles, by measuring characteristics which are related to the velocity of the particles. Particle size distribution is determined from motion of the particles in an acceleration field, or from Brownian motion of the particles. Zeta potential and particle mobility are determined by measuring velocity related characteristics of charged particles in an electric field. Particle velocity characteristics are determined by measuring dynamic properties of light, which is scattered by the particles. A light source illuminates the particles. Scattered light, from the particles, is mixed with light, from the light source, onto at least one light detector. The detector produces a signal, which is indicative of velocity related characteristics of the particles. The velocity characteristics are also determined by measuring light scattered from particles moving through an illumination pattern, with a periodic intensity structure. In addition, the velocity characteristics of particles are utilized to separate particles into different ranges of particle size, for size analysis using dynamic and static light scattering methods. | 09-16-2010 |
| 20100231910 | SYSTEMS AND METHODS FOR IN-LINE MONITORING OF PARTICLES IN OPAGQUE FLOWS - Systems and methods are disclosed for particle monitoring. An exemplary method includes confining a flowable sample which is opaque to at least a first range of wavelengths of light waves; measuring transparency of the flowable sample; compressing the flowable sample in a first direction while confining the sample in a second direction parallel to a flow direction of the flowable sample and orthogonal to the first direction, while elongating the sample in a third direction orthogonal to the first and second directions. When the sample is compressed in the first direction, the sample becomes transparent to at least one of the wavelengths in the first range of wavelengths, and the method can include identifying characteristics of particles contained in the sample which has been compressed. | 09-16-2010 |
| 20100253944 | PARTICLE COUNTING AND DNA UPTAKE SYSTEM AND METHOD FOR DETECTION, ASSESSMENT AND FURTHER ANALYSIS OF THREATS DUE TO NEBULIZED BIOLOGICAL AGENTS - The Nebulized Airborne Biohazard Stage Alert (NABSA) is a method utilizing an optical particle counter in conjunction with a fluorometer as triggers to detect and assess potential biohazard threats infused into surrounding air. In the first stage an optical particle counter is constantly passing sampled air in front of an energy source, in turn scattering light. This scattered light is evaluated to establish if the particles are above one micrometer in concentrations, and thus potentially an aerosolized threat. Such detection triggers the secondary stage in which the sample particles are tested for viability via processing through a dye with fluorescent properties affected when bonded with an entity universally found in all biological substances and a UV light source. The detection of concentrations of oversized, viable particles triggers the third stage to compare a sample of the particles to known biowarfare agents to delineate the specific agent species. | 10-07-2010 |
| 20100277733 | LASER-BASED APPARATUS AND METHOD FOR MEASURING AGGLOMERATE CONCENTRATION AND MEAN AGGLOMERATE SIZE - Apparatuses, methods, and systems for measuring mean particle size and concentration of a polydispersion of agglomerates are disclosed. In one embodiment, the apparatuses include a light source; a focusing lens to form a probe volume; a first light detector positioned at a first angular position from the beam of light; and a second light detector positioned at a second angular position from the first direction of the beam of light, the mean particle size and concentration being determined using nearly invariant functions of a ratio of the light scattered measured by the first and second detectors. | 11-04-2010 |
| 20100315636 | APPARATUS AND METHOD OF PRODUCING A LIGHT BEAM FOR AN OPTICAL MEASUREMENT INSTRUMENT - An apparatus for providing a light beam for use in a diffraction instrument ( | 12-16-2010 |
| 20110026023 | METHOD AND APPARATUS FOR DETERMINING SIZE AND COMPOSITION OF A PARTICULATE MATTER IN A FUME FLOW - A method for determining size and composition of a particulate matter in a fume flow produced by a combustion process. A polarized laser light beam is projected through the fume flow and the scattered light from the fume flow is gathered in a sideward scattering direction and in at least one forward scattering direction. For each of these scattering directions, the gathered light is separated into two polarized light components on the planes parallel and orthogonal to the scattering direction, the light intensity of each of the polarized light components is measured and a scattered light polarization ratio is calculated as a function of the measured light intensities of the polarized light components. The size of the particulate matter and the unburnt carbon percentage in the particulate matter are determined as a function of the calculated scattered light polarization ratios. | 02-03-2011 |
| 20110317161 | STANDOFF DETERMINATION OF THE SIZE AND CONCENTRATION OF LOW CONCENTRATION AEROSOLS - A Multiple-Field-Of-View (MFOV) lidar is used to characterize the size and concentration of low concentration of bioaerosol particles. The concept relies on the measurement of the forward scattered light by using the background aerosols at various distances at the back of the sub-visible cloud. It also relies on the subtraction of the background aerosol forward scattering contribution and on the partial attenuation of the first order backscattering. We demonstrate theoretically and experimentally that the MFOV lidar can measure with a good precision the effective diameter of low concentration bioaerosol clouds. | 12-29-2011 |
| 20120044493 | DYNAMIC AND DEPOLARIZED DYNAMIC LIGHT SCATTERING COLLOID ANALYZER - Apparatus are described for measuring the characteristics of colloidal particles suspended in transparent media by Dynamic Light Scattering (DLS) and Depolarized Dynamic Light Scattering (DDLS) into regions where conventional measurements are difficult or impractical. Matching the diameter of an illuminating beam and an intersecting diameter of a field stop image extends measurements into regions that include concentrated turbid suspensions that frequently appear so visually opaque that multiple scattering typically gives a falsely low estimate of particle size. At the opposite extreme, where insufficient signal is available to determine either or both of the translational and/or rotational relaxation times of the particles, typically where they are too small, too few, or of insufficient refractive index difference from the medium to scatter enough light, measurements can be improved by: a) using a sufficiently large aperture such that many coherence areas fall upon the detector; and b) optical homodyne amplification of the scattered signal. | 02-23-2012 |
| 20120062890 | Method and Its Apparatus for Inspecting Particles or Defects of a Semiconductor Device - Conventionally, a particle/defect inspection apparatus outputs a total number of detected particles/defects as the result of detection. For taking countermeasures to failures in manufacturing processes, the particles/defects detected by the inspection apparatus are analyzed. Since the inspection apparatus outputs a large number of detected particles/defects, an immense time is required for analyzing the detected particles/defects, resulting in a delay in taking countermeasures to a failure in the manufacturing processes. In the present invention, an apparatus for optically inspecting particles or defects relates a particle or defect size to a cause of failure in an inspection result. A data processing circuit points out a cause of failure from the statistics on the inspection result, and displays information on the inspection result. A failure analysis is conducted by setting a threshold for identifying a failure in each of regions on a semiconductor device or the like to statistically evaluate detected particles. | 03-15-2012 |
| 20120075629 | PARTICLE ANALYSIS FOR CORROSION RATE MONITORING - Methods and apparatus relate to measuring corrosion rate. Corrosive fluid contacts a metal powder altering physical properties of the metal powder due to resulting corrosion thereof. For example, the corrosion diminishes mass of the metal powder reducing particle size and particle surface area of the metal powder. Since these physical properties of the metal powder are indicative of the corrosion rate, analysis of the metal powder provides the corrosion rate based on difference in the property of the metal powder before and after the contact with the corrosive fluid. | 03-29-2012 |
| 20120099105 | Portable Ultrafine Particle Sizer (PUPS) Apparatus - The Portable Ultrafine Particle Sizer (PUPS) invention is provided. The PUPS is an instrument which can measure particle number concentration for particle sizes under 200 nanometers The PUPS has a compact design which allows it to be mounted on vehicles with relative ease. Size discrimination is accomplished using, a compact reverse Differential Mobility Analyzer (rDMA) Particle charging is accomplished using a low-cost method for corona ionization. Concentration measurements are completed using a unique flexible printed circuit board electrode which can be easily removed for cleaning, disposal or chemical analysis of collected particles at the end of its in situ measurement life. | 04-26-2012 |
| 20120105848 | NANOPARTICLE DETECTOR - The present technology provides a nanoparticle detector that includes a nanoparticle collector that is configured to collect a volume of air that includes nanoparticles and a light source that is configured to transmit light through the volume of air. The nanoparticle detector further includes a first light-receiving element that is configured to receive at least a portion of the transmitted light and to detect characteristics of the nanoparticles within the volume of air based on scattering properties of the transmitted light. | 05-03-2012 |
| 20130182252 | SCATTERED LIGHT MEASURING METHOD - A scattered light method for measuring particle-dependent parameters of gases, in particular particle-dependent parameters of internal combustion engine exhaust gases or other colloids, includes introducing a particle-containing gas into a measuring chamber; emitting a light beam into the measuring chamber; receiving light scattered by the particles using at least two scattered light sensors, the scattered light sensors generating scattered light sensor signals, each being a function of the light received by the respective scattered light sensor; determining an average particle size from the scattered light sensor signals from at least two scattered light sensors and determining at least one further particle parameter from the previously determined average particle size and the scattered light sensor signals. | 07-18-2013 |
| 20130215423 | PARTICLE DIAMETER DISTRIBUTION MEASUREMENT DEVICE - A dynamic scattering type particle diameter distribution measurement device comprising a light receiving part that receives scattered light emitted from the particle group and that outputs a pulse signal in accordance with a photon number of the received light, a plurality of multibit counters that receives the pulse signal while a gate is open and counts a pulse number, a correlator that obtains auto-correlation data from time series data of the pulse number, and a calculation part that calculates particle diameter distribution based on the auto-correlation data, a gate time changing part that changes gate time once or a plurality of times and a gate time judging part that compares mutually the differences between the maximum value and the minimum value of the auto-correlation data output every time the gate time is changed and judges the gate time corresponding to the maximum difference as a recommended value. | 08-22-2013 |
| 20130242301 | Methods and Apparatuses for Contact-Free Holographic Imaging of Aerosol Particles - Methods and apparatuses provide holographic contact-free imaging of aerosol particles in an efficient manner. One apparatus for holographic imaging of an aerosol particle may include: a delivery device configured to deliver the particle into a region; a light source for outputting a first beam of light and a second beam of light, wherein the first beam travels into the region producing a first light wave which is un-scattered by the particle and a second light wave that is scattered by the particle, and the second beam does not travel into the region; a beam splitter for combining the second beam with the scattered light of the first beam into combined interference light; an image sensor for sensing an interference pattern created by the combined interference light; and an image processor configured to generate an image of the aerosol particle based on the sensed interference pattern. | 09-19-2013 |
| 20130301047 | MEASUREMENT DEVICE AND METHOD FOR DETECTION OF AIRBORNE PARTICLES - A measurement device and method for the detection of airborne particles. The device includes a nozzle designed to produce a laminar flow of air with a flow path beyond the nozzle, a first laser and a second laser being positioned for emitting time-amplitude modulated laser light with intersecting laser beams with a laser beam intersection region in a region of the air flow path, and two photodetectors positioned for the detection of laser light scattered in the laser beam intersection region by airborne particles contained in the laminar air flow. The lasers are designed for emission of time-amplitude modulated laser light of identical laser emission wavelength, and the photodetectors are positioned and designed each for the detection of scattered laser light from both lasers. | 11-14-2013 |
| 20140146314 | METHOD AND APPARATUS FOR MEASURING PARTICLE SIZE DISTRIBUTION IN DRILLING FLUID - A method includes determining particle size distribution (PSD) in a fluid flow line based on a range of sizes for at least one particle in the fluid flow line and duration of reflection of a laser beam from the at least one particle. The laser beam is focused from a laser beam instrument in direct contact with the fluid low line. | 05-29-2014 |
| 20140152986 | METHODS AND APPARATUS FOR DETERMINING CHARACTERISTICS OF PARTICLES - Method and apparatus are described for improving measurements of scattered light from particles by controlling multiple scattering and coincidence count levels. The scatter path in the particle dispersion and particle concentration are adjusted to reduce multiple scattering in ensemble particle scattering measurement. And the particle dispersion volume and particle concentration are adjusted to reduce coincidence counts in single particle scattering measurements. Alignment of the optical system, for measuring scattered light, is maintained by a reflection apparatus. | 06-05-2014 |
| 20140152987 | System and Method for Separating Samples in a Continuous Flow - One embodiment of the present invention provides for a method for identifying within a single record the location of each of a plurality of samples suspected of containing particles of interest wherein the single record is obtained from a flowing stream of the plurality of samples passing through a particle analyzer. The method comprises introducing into a conduit the plurality of samples suspected of containing particles of interest wherein each ones of the plurality of samples are separated by fluid gaps to produce a plurality of samples separated by fluid gaps and wherein each of the plurality of samples further comprises marker particles. The plurality of samples separated by fluid gaps are flowed through the conduit as a flowing sample stream to a detector of a particle analyzer. The particle analyzer is for example a flow cytometer. The particles of interest when present and/or marker particles are detected as the plurality of samples pass the detector of the particle analyzer. A record over time for the particles of interest when present and/or marker particles in each of the plurality of samples are obtained in the single file once the plurality of samples pass the incident beam of light of the particle analyzer. A time position in the record is identified where particles of interest within any one of the plurality of samples would be located if present based upon the detection of marker particles present within each combined sample from the flowing stream of the plurality of samples. | 06-05-2014 |
| 20140268141 | PULSE SCOPE FOR PARTICLE COUNTER - An airborne, gas, or liquid particle sensor with an on-board data acquisition system that can be used to capture detailed particle pulse information. The information can be used both for on-board analysis and reporting as well as off-line analysis and reporting. | 09-18-2014 |
| 20140285800 | DYNAMIC AND DEPOLARIZED DYNAMIC LIGHT SCATTERING COLLOID ANALYZER - Apparatus are described for measuring the characteristics of colloidal particles suspended in transparent media by Dynamic Light Scattering (DLS) and Depolarized Dynamic Light Scattering (DDLS) into regions where conventional measurements are difficult or impractical. Matching the diameter of an illuminating beam and an intersecting diameter of a field stop image extends measurements into regions that include concentrated turbid suspensions that frequently appear so visually opaque that multiple scattering typically gives a falsely low estimate of particle size. At the opposite extreme, where insufficient signal is available to determine either or both of the translational and/or rotational relaxation times of the particles, typically where they are too small, too few, or of insufficient refractive index difference from the medium to scatter enough light, measurements can be improved by: a) using a sufficiently large aperture such that many coherence areas fall upon the detector; and b) optical homodyne amplification of the scattered signal. | 09-25-2014 |
| 20140368820 | PARTICLE SIZE DISTRIBUTION MEASURING DEVICE - The particle size distribution measuring device | 12-18-2014 |
| 20140375992 | PARTICLE SIZE DISTRIBUTION MEASURING APPARATUS - In order to reduce a calculation time of a particle size distribution, a particle size distribution measuring apparatus includes an operation part for receiving light intensity signals outputted from photodetectors and calculating a particle size distribution of the particles based on the fact that a vector s is represented by a predetermined expression including a product of a vector q and a coefficient matrix K, and the operation part is adapted to calculate values of a plurality of first parameters that depend on the particle sizes of the particles and a plurality of second parameters that depend on spread angles of the diffracted/scattered lights, wherein the first and second parameters are used for calculating one element among elements of the coefficient matrix K, and at least one of these calculated values is stored to be used for calculating another element of the coefficient matrix K. | 12-25-2014 |
| 20150070699 | METHOD AND PARTICLE ANALYZER FOR DETERMINING A BROAD PARTICLE SIZE DISTRIBUTION - A method and a particle analyzer are provided for determining a particle size distribution of a liquid sample including particles of a lower size range, particles of an intermediate size range, and particles of an upper size range. A dark-field image frame is captured in which the particles of the lower size range and the particles of the intermediate size range are resolved, and a bright-field image frame is captured in which the particles of the intermediate size range and the particles of the upper size range are resolved. Absolute sizes of the particles of the intermediate size range and the particles of the upper size range are determined from the bright-field image frame. Calibrated sizes of the particles of the lower size range are determined from the dark-field image frame by using the particles of the intermediate size range as internal calibration standards. | 03-12-2015 |
| 20150116708 | APPARATUS FOR MEASURING PARTICLE SIZE DISTRIBUTION BY LIGHT SCATTERING - Apparatus for determining particle-size distribution of a sample by light-scattering includes a helium neon laser ( | 04-30-2015 |
| 20150138550 | APPARATUS AND METHOD FOR MEASURING PARTICLE SIZE DISTRIBUTION BY LIGHT SCATTERING - Apparatus ( | 05-21-2015 |
| 20150138551 | APPARATUS AND METHOD FOR MEASURING PARTICLE SIZE DISTRIBUTION BY LIGHT SCATTERING - Apparatus ( | 05-21-2015 |
| 20150293006 | METHOD AND APPARATUS FOR MEASURING PARTICLE SIZE DISTRIBUTION IN DRILLING FLUID - A method for measuring particle size distribution in a fluid material, involving inserting a laser beam instrument directly in the fluid flow line, wherein the laser beam instrument focuses a laser beam on a window directly coupled with the fluid flow line, wherein the fluid flow line comprises a fluid having a plurality of particles of different sizes, measuring a diameter of at least one particle in the fluid flow line by reflectance of the at least one particle as the at least one particle passes through the focused laser beam, and determining a duration of reflection of the at least one particle, and obtaining a count of particles in each of a pre-set range group of particle sizes, wherein the count of particles is used to determine particle size distribution in the fluid flow line. | 10-15-2015 |
| 20150330886 | APPARATUS AND METHOD FOR MIXING SOLUTION AND SYSTEM AND METHOD FOR MONITORING PARTICLES IN SOLUTION - An apparatus for mixing a solution includes first and second tanks, a sampling element, a flow control element, a mixing assembly, first and second air-intake systems, and first and second air-exhaust systems. The first tank has a first chamber. The second tank has a second chamber. The sampling element has an extraction port located in the first chamber. The flow control element connects and communicates with the first chamber. Two opposite ends of the mixing assembly connect and communicate with the first chamber and the second chamber, respectively. The first air-intake system and the first air-exhaust system connect and communicate with the first chamber. The second air-intake system and the second air-exhaust system connect and communicate with the second chamber. | 11-19-2015 |
| 20150346076 | NANOPARTICLE ANALYZER - The subject matter disclosed herein provides methods for detecting and analyzing individual nanoparticles of the same, similar, or different sizes co-existing in a fluid sample using multi-spectral analysis. A plurality of light sources may be configured to produce a plurality of light beams at different spectral wavebands. An optical assembly may be configured to combine the plurality of light beams into one or more incident light sheets. Each incident light sheet may illuminate one or more nanoparticles in a liquid sample. One or more image detectors may be configured to detect, using a plurality of wavelengths, light scattered or emitted by one or more nanoparticles. The plurality of wavelengths may correspond to the different spectral wavebands of the plurality of light beams. Related apparatus, systems, techniques, and articles are also described. | 12-03-2015 |
| 20150355088 | DYNAMIC AND DEPOLARIZED DYNAMIC LIGHT SCATTERING COLLOID ANALYZER - Apparatus are described for measuring the characteristics of colloidal particles suspended in transparent media by Dynamic Light Scattering (DLS) and Depolarized Dynamic Light Scattering (DDLS) into regions where conventional measurements are difficult or impractical. Matching the diameter of an illuminating beam and an intersecting diameter of a field stop image extends measurements into regions that include concentrated turbid suspensions that frequently appear so visually opaque that multiple scattering typically gives a falsely low estimate of particle size. At the opposite extreme, where insufficient signal is available to determine either or both of the translational and/or rotational relaxation times of the particles, typically where they are too small, too few, or of insufficient refractive index difference from the medium to scatter enough light, measurements can be improved by: a) using a sufficiently large aperture such that many coherence areas fall upon the detector; and b) optical homodyne amplification of the scattered signal. | 12-10-2015 |
| 20150377761 | PARTICLE SIZE DISTRIBUTION MEASURING APPARATUS - A particle size distribution measuring apparatus having: a light intensity distribution obtaining unit for obtaining the light intensity distribution that occurs when the sample cell is irradiated with light for measurement from a light source through detection by a detector; and a particle size distribution calculating unit for calculating the particle size distribution of the particles to be measured included in the sample by using the light intensity distribution obtained by the light intensity distribution obtaining unit, the temperature adjusting member for adjusting the temperature of the sample cell is movable between a first location along the light path around the sample cell and a second location that is outside the light path, and the temperature adjusting member is moved to the second location when the sample is irradiated with the light for measurement from the light source. | 12-31-2015 |
| 20160003728 | METHOD OF AND APPARATUS FOR ASCERTAINING THE SIZE OF PARTICLES - A method of ascertaining the size of small particles is disclosed. The method includes the steps of: a) intersecting at least two light beams at an intersection volume; b) sensing at each of a plurality of sensing positions angularly displaced from one another light scattered by a particle substantially in the intersection volume, and producing respective output signals indicative of the sensed light; c) ascertaining the phase difference between one of the signals and each other of the signals to give a measured indication of the variation of phase difference with angular displacement; and d) comparing the measured indication with at least one known indication of the variation of phase difference with angle for a known particle size and thereby determining the size of the particle substantially in the intersection volume. | 01-07-2016 |
| 20160103077 | LIQUID CONTAMINANT SENSOR SYSTEM AND METHOD - A liquid contaminant sensor system and method. An example system includes at least one light source. The example system includes at least one light detector to receive a light signal from the at least one light source. The example system includes a signal processor to compare the light signal received at the at least one light detector with a reference signal and determine if a particle is present in a liquid. An example liquid contaminant sensor method includes emitting a light into a detection path and a reference path, detecting a light signal from the detection path and the reference path, and comparing the light signal with a reference signal to determine if a particle is present in a fluid. In an example, a fluid path is split into a detection path and a reference path. In another example, the fluid path includes both the detection path and reference path. | 04-14-2016 |
| 20160202164 | METHODS AND APPARATUS FOR DETERMINING CHARACTERISTICS OF PARTICLES FROM SCATTERED LIGHT | 07-14-2016 |
| 20160202165 | DEVICE AND METHOD FOR OPTICALLY DETERMINING PARTICLE PROPERTIES | 07-14-2016 |
| 20160252442 | Apparatus and Method for Determining Sizes of Particles In A Fluid | 09-01-2016 |
| 20160252443 | IMPROVEMENTS RELATING TO PARTICLE CHARACTERISATION | 09-01-2016 |
| 20160377539 | MULTIFUNCTIONAL PARTICLE ANALYSIS DEVICE AND METHOD OF CALIBRATING THE SAME - A multifunctional particle analysis device includes a particle measuring device and a particle composition analysis device. Calibration particles for which at least the number, size, and composition thereof are known are input to the particle measuring device and the particle composition analysis device and analyzed. The sensitivity of the particle measuring device is calibrated in accordance with the number and size of the calibration particles as measured by the particle measuring device, and the sensitivity of the particle composition analysis device is calibrated in accordance with the mass composition of the calibration particles as measured by the particle composition analysis device. Moreover, the irradiation axis of particles that enter the particle composition analysis device relative to a capturing unit is calibrated in accordance with a state in which the calibration particles are captured on the capturing unit of the particle composition analysis device. | 12-29-2016 |
| 20180024036 | METHOD OF ESTIMATING CLOUD PARTICLE SIZES USING LIDAR RATIO | 01-25-2018 |
| 20180024270 | MULTI-FIBER OPTICAL SENSOR FOR ICING | 01-25-2018 |
| 20220136955 | LASER PARTICLE SIZE ANALYZER WITH LIQUID SHEATH FLOW MEASURING CELL - A laser particle size analyzer with a liquid sheath flow measuring cell comprises a measuring cell which comprises a particle flow leading-in cavity ( | 05-05-2022 |
