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| Number | Title | Issue Date |
| 7884332 | Radiation detector An ionization detector having a grid of electrodes disposed perpendicular to an oscillating voltage. Charge released from an ionization event oscillates in the detector medium at the same frequency as the applied oscillating voltage. The electrode grid is configured... | 02/08/2011 |
| 7679063 | Method and apparatus for identifying photocatalytic coatings A method of and apparatus for identifying the presence of thin photocatalytic (PCAT) coatings on glass surfaces. An apparatus is disclosed that can determine whether a PCAT coating (which may comprise titanium dioxide, for example) having a thickness of less than ab... | 03/16/2010 |
| 7531810 | Integrated half-beam profile measurement and polar profile for circular radiation field symmetry assessment A method for routine monitoring and quality assurance of field asymmetry of high energy circular radiation beam producing equipment. The quality assurance process of field symmetry for devices such as stereotactic radiosurgery (SRS) systems is simplified by directly... | 05/12/2009 |
| 7368726 | Method and apparatus for detecting high-energy radiation using a pulse mode ion chamber A method for measuring high-energy radiation flux includes applying a positive voltage to electrodes in an ion chamber filled with a gas capable of forming charged ions by a high-energy radiation, measuring a positive ion current signal related to ion currents induc... | 05/06/2008 |
| 7351982 | Portable nuclear material detector and process A portable, hand held, multi-sensor radiation detector is disclosed. The detection apparatus has a plurality of spaced sensor locations which are contained within a flexible housing. The detection apparatus, when suspended from an elevation, will readily assume a su... | 04/01/2008 |
| 7289057 | Method and apparatus for detection of signal having random characteristics A method for detecting a signal having random characteristics. A plurality of bursts are detected within a predetermined time period. The plurality of bursts are evaluated to determine how many pulses each of the plurality of bursts contains. The signal having rando... | 10/30/2007 |
| 7186986 | Radiation detector with converters A high efficiency radiation detector employs longitudinally extending converter elements receiving longitudinally propagating radiation to produce high-energetic electrons received by detector structures in interstitial spaces. The secondary electron generation in t... | 03/06/2007 |
| 7142634 | Radiation field detection A radiation field detection system, for use with a radiating device, includes a radiation detector configured to receive radiation and to provide radiation strength indicia of amounts of radiation received, a positioning mechanism connected to the radiation detector... | 11/28/2006 |
| 7113321 | Optical deflection apparatus and manufacturing method thereof, optical deflection array, imaging apparatus, and image projection display apparatus A miniaturized and highly integrated optical deflection apparatus is realized in which the number of electrodes for driving the optical deflection apparatus is reduced. The optical deflection apparatus implements a sheet member that is electrically floating and plur... | 09/26/2006 |
| 7078704 | Cylindrical ionization detector with a resistive cathode and external readout A new design for a cylindrical ionization detector, featuring a resistive cathode, and external pickup wires that sense both the azimuthal and radial coordinates of interaction vertices. Combined with measurement of the longitudinal coordinate (using resistive anode... | 07/18/2006 |
| 6822238 | Monitoring The invention provides apparatus and methods which facilitate movement of an instrument relative to an item or location being monitored and/or the item or location relative to the instrument, whilst successfully excluding extraneous ions from the detection location.... | 11/23/2004 |
| 6818901 | Gaseous-based radiation detector A radiation detector comprises two electrode arrangements, each including a dielectric substrate and an electrically conducting layer formed on a first surface of respective dielectric substrate, wherein the electrodes are oriented such that the conducting layers ar... | 11/16/2004 |
| 6734433 | Inonization chamber, measuring sequence for the activity of a gas emitting radiation β and method using same The present invention concerns an ionization chamber cylindrical in shape comprising an anode (35) formed by a central rod in current-carrying material and a cathode (38) in current-carrying material around the said anode, both connected to two element... | 05/11/2004 |
| 6630717 | CMOS semiconductor circuit with reverse bias applied for reduced power consumption An integrated CMOS semiconductor circuit comprises: an internal circuit composed of CMOS transistors including P3- and N-channel transistors each having a gate electrode and source/drain regions formed on a semiconductor substrate, the internal circuit fu... | 10/07/2003 |
| 6627897 | Detection of ionizing radiation The present invention describes an apparatus for detection of ionizing radiation, wherein the incident radiation ionizes a substance, and the electrons released as a result thereof are accelerated in a dual parallel plate electrode arrangement. These elec... | 09/30/2003 |
| 6452190 | Radiation detector provided with an absorption chamber and a plurality of avalanche chambers In order to obtain suitable absorption of the radiation to be detected in the detector gas of a radiation detector, in particular an X-ray detector, the detector is constructed in such a way that the radiation enters the detector parallel to the counting ... | 09/17/2002 |
| 6414317 | Radiation detector, an apparatus for use in planar beam radiography and a method for detecting ionizing radiation A detector (64) for detection of ionizing radiation, an apparatus for use in planar beam radiography, comprising such a detector, and a method for detecting ionizing radiation. The detector comprises: a chamber filled with an ionizable gas; first and seco... | 07/02/2002 |
| 6346709 | Alpha, beta, and gamma monitor for measuring concentrations of ionizing radiation emitters in ambient air or other media A low cost and simple technique for measurement of radioactive contaminants in the air, soil, or in buildings is provided. The alpha, beta gamma radiation monitor comprises a thin window and two more removable radiation windows on top of a pancake-shaped ... | 02/12/2002 |
| 6259100 | Multiple gap photo-electric sensor using light pipes An optical sensor for detecting a document moving along a document path. The invention provides at least two light paths across the document path, so that the document breaks at least one of the light paths as it moves along the document path, and this br... | 07/10/2001 |
| 6207958 | Multimedia detectors for medical imaging The application of gas-detection principles on both dual-energy detection, such as for chest radiography and mammorgraphy, and quantitative autoradiography enhances dramatically the image quality of the digital dual-energy detector with great implications... | 03/27/2001 |
| 6194714 | Method of processing autoradiography image This is a method of generating a plurality of images of a substrate from radioactive radiation coming from a plurality of radioactive tracers contained in the substrate. To this end, data representing the different detection signals generated by a detecto... | 02/27/2001 |
| 5942757 | Monitor for measuring the radioactivity of a surface A monitor for measuring the activity of a surface contaminated with a radioactive material, such as tritium, is disclosed. The monitor comprises: (a) a collector spaced from the surface; (b) a potential generators for generating a potential difference bet... | 08/24/1999 |
| 5621214 | Radiation beam scanner A radiation beam scanner system employs a peak detection methodology to measure the intensity and distribution of radiation produced by a medical linear accelerator. The scanner system combines the capability to perform scanning measurements with the capa... | 04/15/1997 |
| 5602468 | Method and apparatus for ion chamber identification An apparatus for determining the characteristics of a particular ionization chamber by measuring the capacitance of the chamber and using that capacitance to identify the particular type of chamber being used to measure the ionizing radiation.... | 02/11/1997 |
| 5541415 | Self-calibrating radiation detectors for measuring the areal extent of contamination An apparatus for detecting the area and concentration of radioactive contamination on surfaces, objects and personnel is disclosed. The apparatus is capable of automatic adjustment without intervention by an operator, providing for self-calibration and av... | 07/30/1996 |
| 5479022 | Electron capture detector with guard electrode An improved ECD employing an ECD cell having a third electrode, i.e. guard positioned between the ECD cell field electrodes. The guard electrode is physically interposed between said field electrodes to divert all leakage current in the support insulators... | 12/26/1995 |
| 5440135 | Self-calibrating radiation detectors for measuring the areal extent of contamination An apparatus for detecting the area and concentration of radioactive contamination on surfaces, objects and personnel is capable of automatic adjustment without intervention by an operator, providing for self-calibration and avoiding the need for periodic... | 08/08/1995 |
| 5436459 | UV spectrometer with laser diodes and laser frequency multiplication A laser spectrometer suitable for detecting gas components in a test sample in the ultraviolet range. The measuring laser radiation (2) is sent to a nonlinear crystal (20, 40, 41), which increases the nominal laser frequency to the frequency that correspo... | 07/25/1995 |
| 5298755 | Optical ionization detector An optical ionization detector wherein a beam of light is split so that one arm passes through a fiber optics and the other arm passes through a gas-filled region, and uses interferometry to detect density changes in a gas when charged particles pass thro... | 03/29/1994 |
| 5293130 | Proportional counter device for detecting electronegative species in an air sample Apparatus for detecting an electronegative species comprises an analysis chamber, an inlet communicating with the analysis chamber for admitting a sample containing the electronegative species and an ionizable component, a radioactive source within the an... | 03/08/1994 |
| 5258926 | Method of measuring radiation for a radiation measuring device A method of measuring radiation for a radiation measurement device with at least two Geiger-Muller counter tubes of different sensitivity. A high voltage supply is in connection with each of the Geiger-Muller counter tubes and pulse shaping devices are co... | 11/02/1993 |
| 5206513 | Extended range geiger counting apparatus and method utilizing a single geiger-mueller tube A radiation measurement apparatus and method extends the measurement range of a single Geiger Mueller tube (GMT). The apparatus may operate in a either a conventional mode, used to measure low radiation levels, e.g. background radiation, or an extended ra... | 04/27/1993 |
| 5194737 | Single and double grid long-range alpha detectors Alpha particle detectors capable of detecting alpha radiation from distant sources. In one embodiment, a voltage is generated in a single electrically conductive grid while a fan draws air containing air molecules ionized by alpha particles through an air... | 03/16/1993 |
| 5099129 | Multiple sample radioactivity detector A detecting system capable of simultaneously detecting radioactive emissions from a multiplicity of samples uses a sample holder containing a multiplicity of receiving zones and a multiplicity of drift chambers corresponding respectively to each receiving... | 03/24/1992 |
| 4954710 | Parallax-free gas detector for x-rays An X-ray gas detector for analyzing a material by studying X-ray diffraction. In order to minimize the parallax error without resorting to auxiliary electrodes, difficult to manufacture, a radial field in the whole gas space (40) is generated only by mean... | 09/04/1990 |
| 4889994 | Detection of electromagnetic radiation A system for detecting ultra-violet radiation has a cold cathode discharge tube which produces a pulse each time it avalanches. A logic arrangement steers these pulses successively to separate timers in that order. In response to each pulse, each timer se... | 12/26/1989 |
| 4885751 | Device for modulating a laser beam A laser beam focussed on a moving surface, e.g. of a rolling mill, is modulated by means of a rotating disk with through-orifices. The radial lateral faces of the orifices have, relative to the axis of the laser beam, angles of inclination which are diffe... | 12/05/1989 |
| 4733085 | Photosensitive dopants for liquid noble gases In an ionization type detector for high energy radiation wherein the energy of incident radiation is absorbed through the ionization of a liquid noble gas and resulting free charge is collected to form a signal indicative of the energy of the incident rad... | 03/22/1988 |
| 4695731 | Ionization chamber To enable an ionization chamber used for measuring the intensity of a beam of ionizing radiation, for example an electron beam produced by a linear accelerator and used for radiotherapy, both to give an output signal which is independent of ambient pressu... | 09/22/1987 |
| 4686368 | Apparatus and method for reading two-dimensional electrophoretograms containing ଲ-ray-emitting labeled compounds Apparatus and method for electronically reading planar two dimensional ଲ-ray emitter-labeled gel electrophoretograms. A single, flat rectangular multiwire proportional chamber is placed in close proximity to the gel and the assembly placed in an int... | 08/11/1987 |
