Abstract: Disclosed is a novel composition for radiation image detector. The composition comprises an organic matrix comprising a charge transport material (CTM); and scintillating particles for absorbing radiation, being dispersed in the organic matrix, wherein the scintillating particles are in contact with a charge generation material (CGM).

Abstract: Radiation detectors having nanowires with charged, radiation-labile coatings configured to change the electrical properties of nanowires are provided. In one aspect, a radiation detection device is provided. The radiation detector device includes at least one nanowire having a radiation-labile coating with charged moieties on a surface thereof, wherein the radiation-labile coating is configured to degrade upon exposure to radiation such that the charged moieties are cleaved from the radiation-labile coating upon exposure to radiation and thereby affect a transconductance of the nanowire.

Abstract: The present invention relates to a dosimetry device for an energy particle beam from a source and including at least two ionization chambers, each of which includes a collector electrode and a polarization electrode, said electrodes in each ionization chamber being separated by a gap including a fluid, an energy beam from a single source passing through said ionization chambers, the device being characterized in that said ionization chambers have different charge collection efficiency factors. Said calculation algorithm for the dose rate deposited by said beam is based on the measurement of an output signal in each ionization chamber of the device and on a ?gain? factor related to a first ionization chamber, said ?gain? factor being theoretically predetermined on the basis of said intrinsic and/or extrinsic parameters of said ionization chambers.

Abstract: An infrared detection device including an infrared heat detector and a connection pad each spaced apart from an etching stop layer by a non-zero distance substantially equal relatively to each other, wherein first and second electrically conducting vias are respectively electrically connected to first and second portions of a metal line of a penultimate level of electrical interconnections, and wherein an empty space formed in a first inter-metal dielectric layer surrounds the first electrically conducting via and extends under the infrared heat detector.

Abstract: A system and method for correcting vignetting distortion in an imaging sensor of a multi-camera flat panel X-Ray detector. A scintillator converts X-Ray radiation generated by an X-Ray source into detectable radiation. A displacement unit generates, during a calibration phase, relative displacement between the X-Ray detector and an X-Ray source at a plane parallel to the scintillator. The imaging sensor acquires, during the calibration phase, a first and a second partial images, the first partial image is acquired before the relative displacement is generated, and the second partial image is acquired after the relative displacement is generated. A relative displacement measurement unit measures the relative displacement. Coefficients of a preliminary inverse vignetting function are calculated based on differences between corresponding pixels of the two partial images.

Abstract: The technique introduced herein decouples the traditional relationship between bandwidth and responsivity, thereby providing a more flexible and wider photodetector design space. In certain embodiments of the technique introduced here, a photodetector device includes a first mirror, a second mirror, and a light absorption region positioned between the first and second reflective mirrors. For example, the first mirror can be a partial mirror, and the second mirror can be a high-reflectivity mirror. The light absorption region is positioned to absorb incident light that is passed through the first mirror and reflected between the first and second mirrors. The first mirror can be configured to exhibit a reflectivity that causes an amount of light energy that escapes from the first mirror, after the light is reflected back by the second mirror, to be zero or near zero.

Abstract: A detector (22) detects an event. First and second time-to-digital converters (TDCs) (70, 72) generate first and second time stamps (TS1, TS2) for the detection of the event. The first TDC and the second TDC are both synchronized with a common clock signal (62) that defines a fixed time offset between the second TDC and the first TDC. An autocalibration circuit (120) adjusts the first TDC and the second TDC to keep the time difference between the second time stamp and the first time stamp equal to the fixed time offset between the second TDC and the first TDC. The detector may be a detector array, and trigger circuitry (28) propogates a trigger signal from a trigger detector of the array of detectors to the first and second TDC's. Skew correction circuitry (132, 134, 136, 142, 60, 162) adjusts a timestamp (TS) based on which detector is the triggering detector.

Abstract: An intensifying screen for exposing X-ray film includes a screen support backing, a luminescent layer having a luminescent material that emits light in the presence of X-rays, and a reflective layer disposed between the luminescent layer and the screen support backing, the reflective layer including a plurality of micro-prisms that reflect light emitted by the luminescent material. An X-ray film cassette includes at least one intensifying screen and a housing surrounding the at least one intensifying screen.

Abstract: A stability of at least one foulant within a hydrocarbon-based fluid sample may be determined where the hydrocarbon-based fluid sample may have or include, but is not limited to a hydrocarbon fluid and foulant particles. The fluid sample may have a viscosity ranging from about 0.5 cSt to about 5000 cSt. The hydrocarbon-based fluid sample may be centrifuged, and a laser light (in the near-infrared region) with a detector may be applied to the hydrocarbon-based fluid sample. At least one transmittance measurement from the laser light passing through the hydrocarbon-based fluid sample may be used to measure foulant flocculation. A foulant stability reserve measurement may be obtained by comparing a first transmittance measurement of the centrifuged hydrocarbon-fluid sample to a second transmittance measurement of a non-centrifuged hydrocarbon-fluid sample.

Abstract: Provided is an apparatus for measuring a level of molten metal which has a simple structure and is highly robust against a change in level at a local portion of the surface of molten metal. The apparatus for measuring a level of molten metal according to a first aspect of the present invention is an apparatus which measures a level of molten metal in a mold. The apparatus includes an omnidirectional transmitting antenna; an omnidirectional receiving antenna; and a signal processor. The apparatus measures the level of molten metal in the mold using electromagnetic wave in ultra-high frequency range emitted into the mold by the omnidirectional transmitting antenna.

Abstract: An electronic device to simply and efficiently measure energy of incident photons in a very short time and with a very high count rate and high precision, starting from current pulses from an ionizing electromagnetic radiation detector, the electronic device including an analog delay line with switched capacitors with controlled loss at an output from a charge preamplifier.

Abstract: Various improvements to inflatable membranes for use in three-dimensional imaging of interior spaces are disclosed. These improvements include, among other things, equipping the inflatable membrane with desirable optical features, such as fiducials, optical coatings, etc., that can be used to improve data acquisition.

Abstract: Apparatus and methods for charge collection control in radiation detectors are provided. One radiation detector includes a semiconductor substrate, at least one cathode on a surface of the semiconductor substrate, and a plurality of anodes on a surface of the semiconductor substrate opposite the at least one cathode, wherein the plurality of anodes have gaps therebetween. The radiation detector further includes a charge collection control arrangement configured to cause one or more charges induced within the semiconductor substrate by incident photons to drift towards one or more of the plurality of anodes.

Abstract: Systems and methods for scanning with radiation detectors are provided. One system includes at least one radiation scanning camera-head, an array of at least one pixelated radiation detector having an imaging surface including a two dimensional array of pixels, and a scanning unit positioned between the radiation detector and the object. The scanning unit includes first and second radiation blocking plates having first and second two-dimensional arrays of openings, respectively, wherein the array of pixels and the first and second arrays of openings have a same pitch. Additionally, for each of a plurality of scan positions of the scanning unit, the first and second moveable plates and the imaging surface are positioned differently with respect to each other to produce different inclination angles in response to each scan position.