234 results about "Backscatter" patented technology

Methods and devices for analyzing a sample from a subject are provided. A device includes one or more coherent light sources and one or more partially coherent light sources. The light sources are configured to emit first and second wavelengths of electromagnetic radiation towards an imaging chamber configured to hold blood cells. The light sources are aligned to illuminate a single common area of the imaging chamber. The device includes optics positioned to receive light from the imaging chamber, and a detector in optical communication with the optics. The detector is configured to detect fluorescence emission and backscatter from blood cells when present in the imaging chamber. The device includes mixers / unmixers configured to replicate and mix first and second signals representative of the responses to the first and second wavelengths after interacting with the plurality of blood cells to generate spectro-spatial responses.

The invention relates to the technical field of nuclear radiation imaging, in particular to a radiation array detector, a back scattering imaging system and a back scattering imaging method. The radiation array detector comprises an X-ray photon absorption structure which comprises high-strip-shaped scintillators and low-strip-shaped scintillators which are alternately arranged, the high-strip-shaped scintillators are used for detecting back scattering X-ray photons incident at all angles, the low-strip-shaped scintillators are used for accurately determining the incident direction of the X-ray photons through the collimation effect, and the high-strip-shaped scintillators and the low-strip-shaped scintillators are used for detecting the incident direction of the back scattering X-ray photons; after X-rays enter the photon absorption structure, the high-strip-shaped scintillators and / or the low-strip-shaped scintillators receiving X-ray photons generate scintillation photons. The silicon photomultiplier array is connected with the high strip-shaped scintillator and the low strip-shaped scintillator through a light guide and is used for converting scintillation photons into photoelectric signals; and the position and energy information coding circuit is used for carrying out position and energy information coding on the photoelectric signals generated by the silicon photomultiplier array. According to the invention, the detection efficiency and the direction identification capability of the back scattering X-ray can be effectively improved.

An alternating pulsed lidar system comprising a laser beam generator, a receiver, and an analyzer. The laser beam generator is configured to sequentially emit laser beam pulses from ports for an aircraft into an atmosphere on an alternating basis between the ports. The receiver is configured to receive a backscatter light generated in response to sequentially emitting the laser beam pulses and generate backscatter data from the backscatter light. The analyzer is configured to determine a set of parameters for the aircraft using the backscatter data.

A laser beam scanning system comprises a lidar system in an aircraft and a controller. The lidar system is configured to emit a laser beam into an atmosphere during flight of the aircraft; receive backscatter light generated in response to emitting the laser beam; and generate backscatter data using the backscatter light. The controller is configured to control the lidar system to move the laser beam to scan an area using a pattern that is based on a sequence of locations in the pattern being nearest to a center of the area. The controller is configured to control the lidar system to generate measurements of the area using the backscatter data generated from scanning the area.

The invention relates to the field of optical measurement, in particular to a reflective interference film thickness measurement method and system for eliminating back scattering of a transparent substrate, and the method comprises the following steps: transmitting a light beam through a low-coherence-length broadband light source, and forming linearly polarized light through polarization modulation; focusing the light beam to the surface of the film through a confocal optical system; collecting reflection interference signals of the upper surface and the lower surface of the film; spatial filtering, low-coherence gating and polarization control are used for cooperatively inhibiting back scattering of the substrate. And processing the acquired interference signal, and calculating to obtain film thickness information. According to the invention, triple inhibition mechanisms are adopted for synergistic effect, and the method comprises the following steps: spatial filtering: shielding out-of-focus back reflected light through a confocal small hole; low-coherence gating: using a short coherence length to naturally suppress a reflected signal beyond a coherence range; and polarization control: further weakening stray light interference through polarization state matching, and effectively suppressing back scattering of the substrate.

An inspection portal includes a first x-ray source configured to emit a first beam, a first backscatter detector configured to detect backscatter from the first beam, a second x-ray source configured to emit a second beam, a second backscatter detector configured to detect backscatter from the second beam, and at least one first collimator and at least one second collimator, each oriented to detect backscatter from the associated beam and to block scatter from the other beam. The first and second backscatter detectors are configured to weight signals acquired using each of their detector element based on the first and second beams. The first backscatter detector is configured to use signal processing techniques to mitigate crosstalk due to scatter from the second beam, and the second backscatter detector is configured to use the signal processing techniques to mitigate crosstalk due to scatter from the first beam.

The invention discloses a portable X-ray back scattering security check system based on AI image enhancement. The system belongs to the technical field of radiation imaging, and comprises a sensing unit used for sensing physical situation information in an imaging process so as to generate time-sequenced physical prior data; the prediction unit is used for predicting a future scanning behavior based on the physical prior data to generate a feed-forward control instruction and prediction confidence; the regulation and control unit is used for adaptively regulating and controlling scanning parameters based on the feedforward control instruction and recording execution information including regulation and control residual errors; and the AI reconstruction processor is used for performing enhanced reconstruction on the original X-ray image based on the physical priori data, the prediction confidence and the execution information. By constructing an intelligent closed loop of perception, prediction, regulation and control and reconstruction, physical uncertainty information in the imaging process is quantized and used for guiding AI reconstruction, so that the problem of information fault between physical acquisition and digital reconstruction is solved, and the quality and reliability of a final image are improved.

Methods and devices for analyzing a sample from a subject are provided. A device includes one or more coherent light sources and one or more partially coherent light sources. The light sources are configured to emit first and second wavelengths of electromagnetic radiation towards an imaging chamber configured to hold blood cells. The light sources are aligned to illuminate a single common area of the imaging chamber. The device includes optics positioned to receive light from the imaging chamber, and a detector in optical communication with the optics. The detector is configured to detect fluorescence emission and backscatter from blood cells when present in the imaging chamber. The device includes mixers / unmixers configured to replicate and mix first and second signals representative of the responses to the first and second wavelengths after interacting with the plurality of blood cells to generate spectro-spatial responses.

A backscatter x-ray system has an x-ray device, a movable platform, and a processor. The x-ray device includes an x-ray emitter and an x-ray detector. The movable platform positions the x-ray device relative to a frontside of a structure. The processor is communicatively couplable to the x-ray device. The x-ray emitter emits x-rays that penetrate the structure from the frontside. The x-ray detector detects a backscatter of the x-rays reflected from the structure. The processor generates x-ray images of the structure based on the backscatter, and analyzes the x-ray images in a manner facilitating at least one of manufacturing and inspection of the structure.

There is provided a method for inspecting and measuring one or more installed one-sided fasteners in a structure. The method includes positioning an X-ray imaging system at a first side of the structure at a location of the one or more installed one-sided fasteners. The method further includes emitting X-rays at the first side of the structure, detecting backscatter from the one or more installed one-sided fasteners, and generating image data from the X-ray imaging system in response to detecting the backscatter. The method further includes measuring and analyzing the image data, with an image processing system, to obtain one or more measurements of one or more dimensions of the one or more installed one-sided fasteners. The method further includes using the image data to inspect the one or more installed one-sided fasteners, and to detect any inconsistencies in the one or more measurements of the one or more dimensions.

A vacuum cleaner device comprises a housing having a motor fan assembly configured to generate an airflow along an airflow path extending between a dirty air inlet and a clean air outlet. At least one dust particle sensor assembly is mounted along the airflow path and downstream of the motor fan assembly wherein the at least one dust particle sensor assembly comprises a light source and a light detector wherein the light detector is configured to generate a detected light signal in response to backscattered light from dust particles in the airflow. A controller is connected to the at least one dust particle sensor assembly and configured to generate a signal indicative of the operational status of the vacuum cleaner device in response to the received detected light signal from the at least one dust particle sensor assembly.

A method to perform measurements of a field (100) is disclosed. The method includes disposing a landing dock (122) at a target location in the field, the landing dock (122) being coupled to a fiber optic cable (123) for distributed fiber-optic sensing measurement, directing an unmanned aerial vehicle (UAV) (150) to land on the landing dock, the UAV (150) including an interrogator unit (151), communicatively coupling, in response to the UAV landing on the landing dock (122), the interrogator unit (151) and the fiber optic cable (123), sending, by the interrogator unit (151), a light pulse to the fiber optic cable (123), receiving, by the interrogator unit (151) and in response to sending the light pulse, a backscattered light signal from the fiber optic cable (123), and generating, by the interrogator unit (151) and based on the received backscattered light signal, a measurement of the target location.

The invention relates to a reduced-size FMCW lidar imager system. The imager system comprises an optical source 10 for a coherent, continuous and frequency-modulated primary signal Sp in order to illuminate the scene 2; an optical collection element 41 configured to collect a backscattered signal Sret,c; a photodetector 50 intended to receive a heterodyne signal Sh associated with the collected signal Sret,c; and a processing unit 60 configured to determine the distance zsc from the scene based on a beat frequency of the heterodyne signal sh. It is configured to fully direct the primary signal Sp to the scene 2. It additionally comprises a reflector 42 configured to reflect a portion Spr,nc, called uncollected signal Sret,nc, of the backscattered signal Sret, not collected by the optical collection element 41, in the direction of the scene 2.

According to the high-gain back scattering detector and the observation system provided by the invention, the detector can be adaptively integrated with the immersed objective lens, and the combination scheme can realize the remarkable advantage of no loss of the working distance. According to the detector provided by the invention, the light path conduction structure is optimized, and the detector is cooperatively matched with the immersed objective lens, so that the advantage of high-resolution imaging of the immersed objective lens is reserved, the efficient capturing capability of the detector on backscattered electrons is maintained, and sufficient working distance can still be ensured in a high-precision observation scene. The flexible optical fiber is adopted to complete optical signal transmission in the sample bin, the length and the overall size of the light guide pipe can be effectively reduced, and the situation that a large-size light guide pipe of a conventional scintillator type back scattering electron detector occupies too much space in the sample bin is avoided. In addition, the detector realizes four-channel independent imaging of the scintillator type back scattering electron detector through a customized four-channel light guide pipe by connecting an independent optical fiber and a PMT.

A system may include a fiber optic cable buried under a surface and a smart sensor module coupled to the fiber optic cable. A controller may be coupled to the smart sensor module. The smart sensor module includes a light source coupled to an end of the fiber optic cable and a detector coupled to the end of the fiber optic cable. The controller may manage a transmission of a pulse of light from the light source to launch the pulse of light into the fiber optic cable. The detector may receive a backscatter generated from the pulse of light scattered off fiber molecules of the fiber optic cable. The smart sensor module may determine a temperature of the fiber optic cable based on an intensity of the generated backscatter. The controller may send an alert when the determined temperature is outside a predetermined threshold range from a base temperature.

This optical fiber wireless transmission system comprises: an optical transmitter (10) that converts a wireless signal and a monitoring swept-frequency signal in a frequency band different from the frequency band of the wireless signal into an optical signal having an intensity and outputs the optical signal as transmitted signal light; an optical receiver (20) that receives the transmitted signal light from the optical transmitter (10) via an optical fiber (40); and an optical fiber deterioration monitoring device (30) that converts backscattered light of the transmitted signal light from the optical transmitter (10) caused by the optical fiber into an electrical signal, detects the monitoring swept-frequency signal as a reference signal, and performs arithmetic processing to obtain an impulse response.

This invention discloses a method for correcting backscatter intensity jumps in multibeam measurement strips. The method uses a Gaussian weighted function to automatically detect backscatter intensity jumps caused by factors such as equipment parameter settings, taking a moving window as the unit. Weighted average values ​​are then used for difference compensation. The corrected intensity data is iteratively detected and corrected for jump points until the jump points converge to 0. Example calculations show that this method can effectively detect and correct intensity jumps in multibeam strips, improving the efficiency and quality of multibeam strip backscatter intensity data processing and enhancing the accuracy of seabed geomorphological analysis based on multibeam intensity data.

The invention discloses a deep sea multi-beam sound intensity data reconstruction method and device fusing an attention mechanism. The method comprises the following steps: respectively designing damages of different sizes, including rectangular damages and irregular damages, for multi-beam backscattering intensity images of a shallow sea area and a deep sea area, taking the intensity images of the shallow sea area as a training set and a test set, and taking the images of the deep sea area as a verification set; a UNet structure is used as a trunk, and a residual module and a multi-scale channel space attention mechanism are fused to construct a UNet-MCSA intensity image restoration model; and repairing the damage intensity image by using a nearest neighbor interpolation method to obtain an NNI repaired image, and constructing a UNet-MCSA-NNI model through a histogram registration method by taking the UNet-MCSA repaired image as a basis and the NNI repaired image as a reference to obtain a deep sea multi-beam backscattering intensity repaired image with both high precision and visual fidelity. The depth and depth are combined, advantages are complementary, and a new normal form is provided for deep sea multi-beam backscattering intensity image restoration.

The back scattering type visibility sensor comprises a transmitting end shell and a receiving end shell, a transmitting end circuit board and a first LED light source are arranged in the transmitting end shell, and a transmitting end circuit board, a first LED light source, a first photoelectric detector, a second photoelectric detector and a first lens are arranged in the transmitting end shell. The front side of the transmitting end shell is connected with a transmitting end protection cover; a flexible electrothermal film I is arranged on the inner side wall of the transmitting end protection cover; a receiving end circuit board, a third photoelectric detector, a second LED light source, an optical filter and a second lens are arranged in the receiving end shell, the front side of the receiving end shell is connected with a receiving end protection cover, a second flexible electrothermal film is arranged on the inner side wall of the receiving end protection cover, and the included angle between emitted light rays emitted by the first LED light source and scattered light rays received by the third photoelectric detector ranges from 120 degrees to 150 degrees. The visibility sensor disclosed by the utility model can effectively reduce the interference of background noise and improve the visibility measurement accuracy of the buoy platform.

Method (100) for detecting at least one object (2) in a region (4), comprising: providing (102) at least one laser feedback interferometry sensor device (202); aligning (104) the at least one laser feedback interferometry sensor device (202) such that the region (4) is illuminated by at least one laser beam (204) of the at least one laser feedback interferometry sensor device (202); operating (106) the at least one laser feedback interferometry sensor device (202) by means of a periodic modulation signal (208) such that a wavelength of the laser beam (204) of the laser feedback interferometry sensor device (202) is modulated in a pattern depending on the modulation signal (208); Detection (108) of an interference signal (16) generated by rays (206) of the laser beam (204) backscattered by the at least one object (2) in the laser feedback interferometry sensor device (202);Transforming (110) at least part of the interference signal (16) into at least one frequency spectrum (18) of a frequency range; detecting (112) the presence of the at least one object (2) in the range (4).;

The objective of the present invention is to provide a measuring device and a measuring method capable of measuring a statistical characteristic of backward crosstalk in an uncoupled multi-core optical fiber.　A backward crosstalk measuring device 301 according to the present invention is a device for measuring backward crosstalk in bidirectional communication in an uncoupled multi-core optical fiber 50, and includes: a light source 31 that inputs test light of different wavelengths into any one core at one end of the multi-core optical fiber 50; a transmitted light receiver 34 that receives transmitted light, which is the test light that has passed through the core, at the other end of the multi-core optical fiber 50; a scattered light receiver 35 that receives backscattered light output from another core other than said core, at said one end of the multi-core optical fiber 50; and an arithmetic circuit 36 that calculates, as backward crosstalk, the ratio of the light intensity of the backscattered light to the light intensity of the transmitted light for each wavelength of the test light.

1. The name of this design product: Handheld X-ray backscatter detector. 2. Purpose of the product of this design: Equipment used for safety inspection and detection of X-ray backscatter rays. 3. The key point of the design of this product lies in the shape of the product. 4. The picture or photo that best illustrates the design points: three-dimensional picture.

The present invention relates to a lithography system having an apparatus (3) for focusing laser radiation (11) onto a target region (40) in which a target material is arranged which emits extreme ultraviolet radiation (12), EUV radiation, when irradiated with the laser radiation (11), having an interior (30) and at least one focusing element (32, 33), in particular a mirror, arranged in the interior (30) for focusing the laser radiation (11), and having a radiation-absorbing element (35, 45, 55), in particular arranged in the interior (30), having an absorption surface (101) for absorbing laser radiation backscattered and / or reflected back by the target material, wherein the radiation-absorbing element (35, 45, 55) comprises a device for active cooling, in particular a cooling channel (102) for conducting a coolant.

Backscatter Device (BKD) placement and placement calibration may be provided. A plurality of ambient energy sources in a Three-Dimensional (3D) space may be identified and mapped. Each of the plurality of ambient energy sources may be categorized as one of the following: a stationary and controllable ambient energy source, a stationary and uncontrollable ambient energy source, and a mobile ambient energy source. An amount of ambient energy available at each of a plurality of sub-spaces of the 3D space may be determined. The amount of ambient energy available at each of the plurality of sub-spaces may be determined by determining a first amount of ambient energy that is continuously available and a second amount of ambient energy that is likely available at each of the plurality of sub-spaces of the 3D space.

Disclosed herein are methods and systems for performing sample extraction and protective cap placement for highly reactive materials within a charged particle microscope system. The methods include preparing a nested void in a support structure; transferring at least a portion of a sample into the nested void; and milling material from a region of the support structure that defines the nested void. Milling the material from the region of the support structure causes at least some of the removed material to redeposit to form an adhesive bond between the sample and a remaining portion of the support structure. In various embodiments, the sample can then be investigated using one or more of serial section tomography of the sample, enhanced insertable backscatter detector (CBS) analysis of the sample, and electron backscatter diffraction (EBSD) analysis of the sample.

A system for estimating a property of a region of interest includes an acoustic measurement device including a transmitter configured to transmit an acoustic signal having at least one selected frequency, the acoustic signal configured to penetrate a surface of a wellbore in a formation and produce internal diffuse backscatter from formation material behind the surface and within the region of interest, and a receiver configured to detect a return signal from the region of interest and produce return signal data. The system also includes a processing device configured to receive the return signal data, process the return signal data to identify internal diffuse backscatter data indicative of the internal diffuse backscatter, calculate one or more characteristics of the internal diffuse backscatter, and estimate the property of the region of interest based on the one or more characteristics of the internal diffuse backscatter.

An object of the present invention is to provide an optical transmission line test apparatus and a test method capable of measuring a cumulative crosstalk of an optical transmission line in which a plurality of uncoupled multi-core fibers are connected in series from one end side with an OTDR.An optical transmission line test apparatus 301 according to the present invention measures a cumulative crosstalk of an optical transmission line 50 in which a plurality of uncoupled multi-core fibers 50-i are connected in series. The optical transmission line test apparatus 301 includes a test light input unit 10 that inputs optical pulses to each of cores of the uncoupled multi-core fiber 50-1 at one end 50a of the optical transmission line 50; a reception unit 20 that receives backscattered light for each of the cores output from one end 50a; and a calculation unit 30 that acquires a loss distribution occurring in each of the cores from the backscattered light, and calculates the cumulative crosstalk from a connection loss at a connection point zj of the uncoupled multi-core fiber obtained from the loss distribution and a known inter-core mode coupling of each of the uncoupled multi-core fibers 50-i.

The embodiments of the present disclosure provide various techniques for detecting backscatter charged particles, including accelerating charged particle sub-beams along sub-beam paths to a sample, repelling secondary charged particles from detector arrays, and providing devices and detectors which can switch between modes for primarily detecting charged particles and modes for primarily detecting secondary particles.

Described herein is a retroreflective underwater backscatter node comprising a receiver that receives an incoming acoustic signal from a first direction; a reflector that reflects back an incoming acoustic signal in a second direction; and a modulator coupled to the reflector to modulate the reflected incoming acoustic signal as a back-scattered signal. In some embodiments, the first direction and second direction are substantially the same such that the retroreflective underwater backscatter node retro-directs an incoming acoustic signal as a back-scattered signal and incoming and back-scattered acoustic signals propagate in the same but substantially opposite directions.