Abstract: A radiation detection device detects gamma or x-ray radiation quanta with improved timing accuracy and improved energy resolution. The radiation detection device finds application in the detection of gamma and x-ray radiation and may be used in the field of PET imaging, and in spectral CT. The radiation detection device includes a semiconductor scintillator element and a photodetector. The photodetector is in optical communication with the scintillator element. The scintillator element has two mutually opposing faces; a cathode is in electrical communication with one of the two faces and an anode is in electrical communication with the other of the two faces.

Abstract: A method for detecting a radioactive source moving on a linear path substantially parallel to an alignment of N detectors. The method includes: forming N×Nt pulse counting values Mi,t (i=1, 2, . . . , N and t=1, 2, . . . , Nt) from N×Nt detection signals delivered by the N detectors in the form of a succession over time of Nt sets of N signals simultaneously detected by the N detectors over a same duration ?t, a pulse counting value representing a number of pulses detected by a detector over a duration ?t; and computing, using a computer: a set of Nt correlation products Rt, a static mean R of the N×Nt counting values, a correlation condition for each correlation product Rt.

Abstract: A scintillation detector, including a scintillator that emits scintillation; a semiconductor photodetector having a surface area for receiving the scintillation, wherein the surface area has a passivation layer configured to provide a peak quantum efficiency greater than 40% for a first component of the scintillation, and the semiconductor photodetector has built in gain through avalanche multiplication; a coating on the surface area, wherein the coating acts as a bandpass filter that transmits light within a range of wavelengths corresponding to the first component of the scintillation and suppresses transmission of light with wavelengths outside said range of wavelengths; and wherein the surface area, the passivation layer, and the coating are controlled to increase the temporal resolution of the semiconductor photodetector.

Abstract: A system for detecting and tracking motion in a given area, including a first passive motion detection sensor operable for passively detecting motion in any of a first multiplicity of detection zones and, responsive thereto, for providing a first detection output signal including an indication of a first detection zone in which the motion was detected, a second passive motion detection sensor operable for passively detecting motion in any of a second multiplicity of detection zones, each of the second multiplicity of detection zones at least partially overlapping each of the first multiplicity of detection zones, and, responsive thereto, for providing a second detection output signal including an indication of a second detection zone in which the motion was detected, and a processor operable for receiving the first and second detection output signals and, responsive thereto, for providing an indication of a location of the motion.

Abstract: A device having: a scintillator material, an optically transparent element containing a glass or polymer and gadolinium oxide, and one or more photomultiplier tubes adjacent to the scintillator material. The optically transparent element is surrounded by the scintillator material.

Abstract: An ionizing radiation detector or scintillator system includes a scintillating material comprising an organic crystalline compound selected to generate photons in response to the passage of ionizing radiation. The organic compound has a crystalline symmetry of higher order than monoclinic, for example an orthorhombic, trigonal, tetragonal, hexagonal, or cubic symmetry. A photodetector is optically coupled to the scintillating material, and configured to generate electronic signals having pulse shapes based on the photons generated in the scintillating material. A discriminator is coupled to the photon detector, and configured to discriminate between neutrons and gamma rays in the ionizing radiation based on the pulse shapes of the output signals.

Abstract: Various techniques are provided for an infrared sensor assembly having a hybrid infrared sensor array. In one example, such a hybrid infrared sensor array may include a plurality of microbolometers and a non-bolometric infrared sensor. The non-bolometric infrared sensor may be a thermopile or other type of infrared sensor different from a bolometer-based sensor. The non-bolometric infrared sensor may be utilized to provide a more accurate and stable temperature reading of an object or area of a scene captured by the array. In some embodiments, the non-bolometric infrared sensor may also be utilized to perform a shutter-less radiometric calibration of the microbolometers of the array. An infrared sensor assembly may include, for example, the hybrid infrared sensor array, as well as a substrate including bond pads and/or appropriate circuits to obtain and/or transmit output signals from the non-bolometric infrared sensor.

Abstract: An electronic device comprising: an ultraviolet (UV) light sensor; and a processor configured to: generate a plurality of initial UV light measurements by using the UV light sensor, wherein each of the plurality of initial UV light measurements is associated with a respective orientation of the electronic device; and select a reference UV light measurement from the plurality.

Abstract: A device for measurement of the radiological activity in the bottom of an aqueous medium, comprising a sealed case for a radiological detector, means forming a truncated cone containing a material that allows radiation to be measured by said radiological detector to pass through it, comprising a short base and a long base, the long base forming an input face for the radiation to be measured, this cone being assembled to said case in a sealed manner, the short base being placed on the side of the detector input face, and the long base being designed to be placed facing the bottom of this aqueous medium.

Abstract: Provided an ultraviolet-sensing sheet that facilitates measurement of ultraviolet irradiance over a wide area, that is suitable in ultraviolet irradiance in a range from 1 to 1,000 mJ/cm2, a method for manufacturing such an ultraviolet-sensing sheet, and a method for sensing ultraviolet. The ultraviolet-sensing sheet has a change in reflection density ?D1 of 0.2 or more over a range of cumulative illuminance 1 mJ/cm2 or more and less than 10 mJ/cm2, a change in reflection density ?D2 of 0.2 or more over a range of cumulative illuminance 10 mJ/cm2 or more and less than 100 mJ/cm2, and a change in reflection density ?D3 of 0.2 or more over a range of cumulative illuminance 100 mJ/cm2 or more and 1,000 mJ/cm2 or less, as measured at a wavelength of 365 nm when the ultraviolet-sensing sheet is irradiated with a high-pressure mercury lamp.

Abstract: An ionizing radiation detector or scintillator system includes a scintillating material comprising an organic crystalline compound selected to generate photons in response to the passage of ionizing radiation. The organic compound has a crystalline symmetry of higher order than monoclinic, for example an orthorhombic, trigonal, tetragonal, hexagonal, or cubic symmetry. A photodetector is optically coupled to the scintillating material, and configured to generate electronic signals having pulse shapes based on the photons generated in the scintillating material. A discriminator is coupled to the photon detector, and configured to discriminate between neutrons and gamma rays in the ionizing radiation based on the pulse shapes of the output signals.

Abstract: A flat panel detector (FPD) includes an imaging panel having pixels arranged in a matrix, a gate driver for turning thin film transistors (TFTs) of the pixels ON and OFF, a radiation detecting section for detecting the start of x-ray radiation from the x-ray source, and a controller. The controller controls the gate driver to turn the TFTs ON periodically to reset dark charges of the pixels. Before starting a charge accumulating operation for accumulating signal charges for imaging, the controller controls the gate driver to turn the TFTs OFF so that the radiation detecting section may detect the start of x-ray radiation on the basis of charge leaks from the pixels. When the start of x-ray radiation is detected, the controller starts the charge accumulating operation while keeping the TFTs in the OFF condition. Thereafter, the TFTs are turned ON to read out the accumulated signal charges.

Abstract: Systems, methods, and devices for determining neutron-gamma density (NGD) measurement of a subterranean formation that is accurate in both liquid- and gas-filled formations are provided. For example, a downhole tool for obtaining such an NGD measurement may include a neutron generator, neutron detector, two gamma-ray detectors, and data processing circuitry. Neutron generator may emit neutrons into a formation, causing a fast neutron cloud to form. Neutron detector may detect a count of neutrons representing the extent of the neutron cloud. Gamma-ray detectors may detect counts of inelastic gamma-rays caused by neutrons that inelastically scatter off the formation. Since the extent of the fast neutron cloud may vary depending on whether the formation is liquid- or gas-filled, data processing circuitry may determine the density of the formation based at least in part on the counts of inelastic gamma-rays normalized to the count of neutrons.

Abstract: The present disclosure relates to borehole logging methods and apparatuses for estimating formation properties using nuclear radiation, particularly an apparatus and method for estimating a formation lithology parameter. The method may include using gamma ray count or count rate information to estimate a formation lithology parameter that may be one of, but not limited to: Z2/A, bulk density, Z2*bulk density/A, linear attenuation coefficients, and porosity. The method may include using time-dependent ratios with a pulsed radiation source. The method may also include dividing gamma ray information by time and/or by energy window. The apparatus includes a processor and storage subsystem with a program that, when executed, implements the method.

Abstract: Disclosed is an optical imaging system having improved resolution. The disclosed optical imaging system may include a substrate on which a specimen dyed with a fluorescent material is placed; a multiple number of dimer nanopillars formed on the substrate; and a light source unit configured to provide a light source to the substrate, where the light source unit provides an incident ray to the substrate from a first light source to excite the fluorescent material, and afterwards turns off the first light source and activates a second light source and a third light source simultaneously to provide incident rays to the substrate. The disclosed optical imaging system can provide a resolution that is higher than the diffraction limit.

Abstract: An apparatus and a method for multispectral imaging comprising, representation generator arranged to generate a three dimensional representation of a scene, at least one infrared imaging sensor arranged to obtain an infrared image of the scene, and an image overlaying processor arranged to overlay the infrared image onto the three dimensional representation of the scene to produce an infrared three dimensional representation of the scene.

Abstract: A pyroelectric sensing device includes two pyroelectric sensors and a driving mechanism. The driving mechanism is used for driving the two pyroelectric sensors to shift. When a human body stays motionless in an environment, the two pyroelectric sensors driven by the driving mechanism will shift with respect to the human body, such that the two pyroelectric sensors generate different sensing voltages due to the infrared radiation emitted by the human body. Accordingly, the motionless human body will be detected.

Abstract: In one embodiment, an apparatus includes: a first layer including a n+ dopant or p+ dopant; an intrinsic layer formed above the first layer, the intrinsic layer including a planar portion and pillars extending above the planar portion, cavity regions being defined between the pillars; and a second layer deposited on a periphery of the pillars thereby forming coated pillars, the second layer being substantially absent on the planar portion of the intrinsic layer between the coated pillars. The second layer includes an n+ dopant when the first layer includes a p+ dopant. The second layer includes a p+ dopant when the first layer includes an n+ dopant. The apparatus includes a neutron sensitive material deposited between the coated pillars and above the planar portion of the intrinsic layer. In additional embodiments, an upper portion of each of the pillars includes a same type of dopant as the second layer.

Abstract: An apparatus 100 for measuring thermal radiation in one mode of the present invention is used for detecting thermal radiation of an object 12 to be measured.

Abstract: A combined thermal neutron detector and gamma-ray spectrometer system, including: a first detection medium including a lithium chalcopyrite crystal operable for detecting neutrons; a gamma ray shielding material disposed adjacent to the first detection medium; a second detection medium including one of a doped metal halide, an elpasolite, and a high Z semiconductor scintillator crystal operable for detecting gamma rays; a neutron shielding material disposed adjacent to the second detection medium; and a photodetector coupled to the second detection medium also operable for detecting the gamma rays; wherein the first detection medium and the second detection medium do not overlap in an orthogonal plane to a radiation flux. Optionally, the first detection medium includes a 6LiInSe2 crystal. Optionally, the second detection medium includes a SrI2(Eu) scintillation crystal.