113 results about "Flat detector" patented technology

The invention relates to a time-of-flight mass spectrometer for injection of the ions orthogonally to the time-resolving axis-of-flight component, with a pulser for acceleration of the ions of the beam in the axis-of-flight direction, preferredly with a velocity-focusing reflector for reflecting the ion beam and with a flat detector at the end of the flight section. The invention consists of using, both for acceleration in the pulser and for reflection in the reflectors, a gridless optical system made up of slit diaphragms which can spatially focus the ions onto the detector in the direction vertical to the directions of injection and flight axis, but which does not have any focusing or deflecting effect on the other directions. For some reflector geometries it is essential to use an additional cylindrical lens for focusing, and for other reflector geometries the use of such a lens may be advantageous.

A frequency and symbol timing synchronization apparatus for orthogonal frequency division multiplexed (OFDM) signals, and a method performed by the apparatus are provided. This apparatus includes an autocorrelation unit, a comparator, a peak flat detector, a frequency offset estimator, a frequency offset compensation unit, a cross correlation unit and a symbol timing synchronization unit. The autocorrelation unit receives data including a synchronizing symbol made up of at least three identical synchronizing signals, delays the received data by a predetermined delay amount, performs autocorrelation between the received data and the delayed data, normalizes an autocorrelated value, and outputs a normalized autocorrelated value. The comparator compares the normalized autocorrelated value with a predetermined threshold value. The peak flat detector detects as a flat section a section where the normalized autocorrelated value is equal to or greater than the threshold value. The frequency offset estimator estimates a frequency offset within the flat section to obtain a frequency offset value. The frequency offset compensation unit compensates for the frequency offset of a received signal using the frequency offset value. The cross correlation unit performs cross correlation using a frequency offset-compensated signal and a reference signal, and normalizes the cross-correlated value to output a normalized cross-correlated value. The symbol timing synchronization unit detects a point where the cross-correlated value is maximum, and performs symbol timing estimation, thereby performing symbol timing synchronization. In the symbol timing and frequency synchronization apparatus and method, accurate frequency synchronization can be achieved because a large sample error can be allowed. Also, a symbol timing error can be reduced since symbol timing synchronization is achieved using a frequency offset-compensated signal.

A quality control accessory (QC accessory) is provided which is adapted for use in linear accelerator quality control or in verification of an arbitrary isocentric radiation treatment plan of a patient or radiation sensitive body. The accessory includes an absorber, a detector and an optional orientation device. The absorber is rotationally symmetric, preferably spherical or hemispherical. The detector is adapted to be fixed in a stationary spatial relationship with respect to the absorber. The optional orientation device is adapted to maintain the two dimensional detector (2d detector) and the absorber in a fixed relative spatial relationship with respect to the beam focus of the linear accelerator, when the gantry is rotated, so that the central axis of the beam is essentially orthogonal to the 2d detector and the phantom axis of symmetry is parallel to or aligned with the central axis of the gantry rotation axis.

A method and CT scanner are proposed for the production of tomographic section images, in particular X-ray CT images, of a periodically moving object with periodically changing movement and rest phases. For scanning, a number of focus detector combinations with flat detectors are moved on coaxial spiral paths and movement signals from the moving object are measured at the same time in order to detect movement and rest phases. Further, the time correlation between the movement data and the detector output data stored and axial segment image stacks are then reconstructed independently of one another from sub-segments of the spiral paths using the detector output data from each detector which represent a rest phase of the moving object. Additionally, segment image stacks from the n spiral paths of the n focus detector combinations at the correct time are added up in a complementary angle form and in layers to form 180° tomography section images. The axial segment image stacks are reconstructed in a first step from double-inclined reconstruction planes. Further, in a second step, they are reformatted to produce axial segment image stacks, and detector data from a number of successive movement periods are used for this purpose.

An imaging spectrometer, covering the visible through infrared wavelengths, which disperses the light by a plane diffraction grating behind a wedged optical element. This design uses an achromatic doublet lens with a reflective coating on its convex back surface to produce the spectra on a flat detector. Spatial keystone distortion and spectral smile are controlled to less than one tenth of a pixel over the full wavelength range, facilitating the use of simple retrieval algorithms.

An optical system having a pair of ellipsoidal shaped reflective surfaces or mirrors which receive light from an object and provide wide field view imaging for the object. The optical system directs the light onto a flat detector to a record a wide field of view image of the object on the flat detector.

The invention relates to a method for combined bone hardening and scattered radiation correction in X-ray computed tomography of a heterogeneous object with a CT system comprising an X-ray source moved around an object, a flat detector with a large number of distributed detector elements which detect measuring beams from a focal point of the X-ray tube, and a control and arithmetic-logic unit—by iterative reconstruction and segmented vectorial reprojection calculation, wherein a scattered radiation correction and a radiation hardening correction are carried out in each iteration cycle for at least two different material components of the object being examined. The invention also relates to an X-ray CT system for carrying out this method.

An IR microscope (1) is constituted such that, in an optical viewing mode in a beam path of visible light (VIS-R, VIS-T), a first intermediate focus (ZW1) is imaged onto a flat detector surface (15a) of a camera. The IR microscope (1) is constituted such that, in the beam path of the visible light (VIS-R, VIS-T), the first intermediate focus (ZW1) is imaged onto a second intermediate focus (ZW2), and, in the second intermediate focus (ZW2), a Mangin mirror (11) is disposed that corrects a field curvature of the Cassegrain objective (4). The invention provides an IR microscope in which the field curvature generated by the Cassegrain objective is corrected in a simple manner in the optical viewing mode when detection is performed using a flat detector and without restricting the spectral range of the IR microscope.

The invention discloses a scintillator plate for a ray detection flat and a preparation method for the same. The scintillator plate comprises a substrate, a scintillator layer and a reflection layer clamped between the substrate and the scintillator layer; a composition chemical formula of the scintillator layer is (Lu(1-x-y)CexAy)3Al5O12; available ions for A case comprise at least one of Ca2+, Mg2+, Sr2+, Ba2+, Li+, Na+, and K+, 0.001<=x<=0.05, 0.0005<=y<=0.05. The (Lu,A)3Al5O12:Ce transparent ceramic ray flat detector has characteristics of high imaging sharp spatial resolution, low maintenance cost and long service life, and can be applied to devices using ray detection for medical diagnosis, nondestructive tests, public security, radiation dose detection, petroleum exploration, etc.

The invention discloses a customized alimentary canal support and a moulding method and an application method thereof. The moulding method comprises the steps of building a three-dimensional model of an alimentary canal structure of an individual object, and the alimentary canal structure comprises an alimentary canal stenosis or an obstruction part; performing data analysis and structure adjusting to the three-dimensional model; designing a virtual support by using a software; manufacturing a die corresponding to the inner contour of the support; and braiding a customized alimentary canal support on the die. The application method comprises the steps of delivering the customized support that has 4-6 different signs to a position to be planted. The support is successfully installed when the signs arrive at the designed installation position and the rotation angle under the monitor of an X-ray flat detector. In the complex alimentary canal obstruction areas like turnovers of stomach-duodenum and intestine-intestine, a traditional support fails easily, and the support provided by the invention can be used for a best treatment effect because of having the advantages like non-symmetry, high dissect precision, low internal stress, and difficult rotation shedding.

A variable field of view optical system and method comprising providing a forward curved optical element, providing a rearward optical element comprising an axially gradient index material, providing a curved focal surface, and conveying an image on the curved focal surface to a flat detector surface.

The invention discloses a detection substrate, a manufacturing method thereof and a flat panel detector. The detection substrate comprises a substrate body, a plurality of transistors, an oxide layer,a plurality of reading electrodes and a plurality of photoelectric conversion structures, wherein the transistors, the oxide layer, the reading electrodes and the photoelectric conversion structuresare sequentially located on the substrate body; the first electrodes of the transistors are electrically connected with the photoelectric conversion structures in a one-to-one correspondence manner through the reading electrodes, and the material of an active layer comprises an oxide; and each photoelectric conversion structure comprises an N-type semiconductor layer, an intrinsic semiconductor layer and a P-type semiconductor layer. The oxide layer at least covers the channel regions of the transistors and is insulated from the reading electrodes. The oxide layer covering the channel regionsof the transistors is arranged between the layer where each transistor is located and the layer where each reading electrode is located, so hydrogen atoms generated in the subsequent process of depositing the photoelectric conversion structure react with the oxide layer, the hydrogen atoms are prevented from reaching the channel region, the stability of the transistor is effectively improved, andthe performance of the flat panel detector is improved.

The invention provides a flat panel detector and a manufacturing method thereof. The flat panel detector comprises a TFT device with a semiconductor layer, a first insulating layer covering the TFT device, an interlayer insulating layer on the first insulating layer, a cathode electrode which is located on the interlayer insulating layer and connected with the TFT device, and a photoelectric conversion layer located on the cathode electrode. The flat panel detector further comprises a barrier layer on the interlayer insulating layer. At least part of the barrier layer is in a floating state, and at least part of the barrier layer is located directly above the semiconductor layer. According to the invention, the barrier layer is arranged on the flat panel detector; at least part of the barrier layer is located directly above the semiconductor layer; and the barrier layer can block the influence of hydrogen diffusion on the semiconductor layer when the photoelectric conversion layer is formed, and can block the influence of X-ray or ambient light on the semiconductor layer.

The invention relates to an X-ray nondestructive inspection integral remote control platform for electric equipment. The X-ray nondestructive inspection integral remote control platform is characterized by comprising a display screen (1), a control table (2), a telescopic support post (4), an angle regulator (3) and a regulating handle (5), wherein the telescopic support post (4) is fixedly arranged on a moving trolley (6) provided with universal wheels (8); a signal antenna (7) is arranged on the moving trolley (6); a power supply and a central processing unit are arranged in a trolley body of the moving trolley (6). The X-ray nondestructive inspection integral remote control platform has the beneficial effects that the imaging result display of a flat detector and the regulation and control of a vehicle-mounted platform are integrated onto one integral remote control platform in a unified way; detection equipment can be remotely and automatically regulated and controlled in time according to the imaging result; operators can complete all work without walking to and fro; the use complexity is greatly reduced; the X-ray nondestructive inspection efficiency is improved.

The invention provides a firmware packaging method and system of a flat panel detector, a firmware upgrading method and system of the flat panel detector, a storage medium and the flat panel detector.The firmware upgrading method comprises the following steps of: obtaining an upgrading file sent by terminal equipment; decrypting and decompressing the upgrading file; and upgrading each module of the flat panel detector in sequence according to the decrypted and decompressed upgrading file. According to the firmware packaging method and system, the firmware upgrading method and system, the storage medium and the flat panel detector, uniform packaging and uniform upgrading of firmware of different modules in the flat panel detector can be realized, and extra application programs do not needto be installed, so that the operation is simple and the user experience is greatly enhanced.

The invention discloses a moment balancer. The moment balancer comprises a driven gear, a driving gear, a load and an energy storage device, wherein the driven gear and the driving gear are engaged with each other, the load is connected with the driven gear and rotates around the center of the driven gear, and the energy storage device is connected with the driving gear and provides torque for thedriving gear. Due to the fact that the driving gear and the driven gear are set to be in variable-transmission-ratio movement, the pitch line radiuses of the two gears at the instantaneous engaging position are continuously changed, so that the torque generated by the energy storage device on the driven gear through the driving gear and the torque generated by the load gravity adapt to each otherand counteract each other , the load can stably operate during rotation, and accordingly a device provided with the load, for example, an X-ray machine loaded with a flat panel detector operates stably.

An optical sensor having at least one optical transmitting unit for production of a transmitted light beam, a photosensitive flat detector with semitransparent characteristics, through which the transmitted light beam passes, and which re-receives reflection light beams, i.e., from an object, and an evaluation unit for the photoelectric current of the photosensitive flat detector, at least for detection of an object. The photosensitive flat detector advantageously includes an organic polymer layer comprising a photosensitive substrate. An “Organic Photosensitive Diode” (OPD) is particularly advantageously used as the photosensitive flat detector with semitransparent characteristics.