47results about How to "Eliminate periodicity" patented technology

Disclosed herein is a scanning ladar transmitter that employs an optical field splitter / inverter to improve the gaze characteristics of the ladar transmitter on desirable portions of a scan area. Also disclosed is the use of scan patterns such as Lissajous scan patterns for a scanning ladar transmitter where a phase drift is induced into the scanning to improve the gaze characteristics of the ladar transmitter on desirable portions of the scan area.

To make high quality long-range periodic nanostructures in a transparent or semi-transparent substrate, the transparent or semi-transparent substrate is scanned with a linearly polarized laser beam generated by a femtosecond laser and exceeding a predetermined energy / pulse threshold along a scanning path. Sub-diffraction limit structures are formed as periodic planes of modified material in the transparent or semi-transparent substrate extending along the scanning path. The modified material can then be chemically etched to form cavities.

Disclosed herein is a scanning ladar transmitter that employs an optical field splitter / inverter to improve the gaze characteristics of the ladar transmitter on desirable portions of a scan area. Also disclosed is the use of scan patterns such as Lissajous scan patterns for a scanning ladar transmitter where a phase drift is induced into the scanning to improve the gaze characteristics of the ladar transmitter on desirable portions of the scan area. Also disclosed is a compact beam scanner assembly that includes an ellipsoidal reimaging mirror.

Disclosed herein is a scanning ladar transmitter that employs an optical field splitter / inverter to improve the gaze characteristics of the ladar transmitter on desirable portions of a scan area. Also disclosed is the use of scan patterns such as Lissajous scan patterns for a scanning ladar transmitter where a phase drift is induced into the scanning to improve the gaze characteristics of the ladar transmitter on desirable portions of the scan area.

The present invention relates to an ultrasound imaging system in which the scan head includes a beamformer circuit that performs far field subarray beamforming or includes a sparse array selecting circuit that actuates selected elements. When using a hierarchical two-stage or three-stage beamforming system, three dimensional ultrasound images can be generated in real-time. The invention further relates to flexible printed circuit boards in the probe head. The invention furthermore relates to the use of coded or spread spectrum signalling in ultrasound imaging systems. Matched filters based on pulse compression using Golay code pairs improve the signal-to-noise ratio thus enabling third harmonic imaging with suppressed sidelobes. The system is suitable for 3D full volume cardiac imaging.

The present invention relates to an ultrasound imaging system in which the scan head either includes a beamformer circuit that performs far field subarray beamforming or includes a sparse array selecting circuit that actuates selected elements. When used with second stage beamforming system, three dimensional ultrasound images can be generated.

Disclosed herein is a scanning ladar transmitter that employs an optical field splitter / inverter to improve the gaze characteristics of the ladar transmitter on desirable portions of a scan area. Also disclosed is the use of scan patterns such as Lissajous scan patterns for a scanning ladar transmitter where a phase drift is induced into the scanning to improve the gaze characteristics of the ladar transmitter on desirable portions of the scan area.

A LCD device includes first and second LCD panels stacked one on another. Each of the first and second LCD panels includes a pair of transparent substrates, a liquid crystal layer sandwiched therebetween, and a pair of polarizing films sandwiching therebetween the pair of transparent substrates. A light diffusion layer having light diffusion function is interposed between the first LCD panel and the second LCD panel. The light diffusion layer reduces the intensity of the light passed by the first LCD panel, thereby alleviating the periodicity of the arrangement of dark areas and bright areas to alleviate the moire caused by light interference.

A display device includes: i) a substrate member having a transparent area and a plurality of pixel areas, the pixel areas being spaced apart from each other along a first direction and a second direction, the transparent area located between the pixel areas, the second direction being perpendicular to the first direction; and ii) an emission layer located at each of the pixel areas. Among the plurality of pixel areas, a width of the transparent area along the first direction between two pixel areas varies along the second direction. The first direction may be the horizontal direction of a screen realized by the substrate member, the second direction may be a vertical direction, and the emission layer may have a width along the horizontal direction that varies along the vertical direction.

The present invention related to an ultrasound imaging system win which the scan head includes a beamformer circuit that performs far field subarray beamforming or includes a sparse array selecting circuit that actuates selected elements. When using a hierarchical two-stage or three-stage beamforming system, three dimensional ultrasound images can be generated in real-time. The invention further relates to flexible printed circuit boards in the probe head. The invention furthermore related to the use. of coded or spread spectrum signaling in ultrasound imagining systems. Matched filters based on pulse compression using Golay code pairs improve the signal-to-noise ratio thus enabling third harmonic imaging with suppressed sidelobes. The system is suitable for 3D full volume cardiac imaging.

A method of transmitting data packets using a staggered transmission technique by which some transmissions of data packets may be delayed to reduce periodicity inherently caused by synchronous retransmission schemes. The amount of delay should be minimal in order to not adversely effect applications with tight latency constraints, such as Voice over Internet Protocol (VoIP). The delay may be applied to initial transmissions or retransmissions of data packets.

To make high quality long-range periodic nanostructures in a transparent or semi-transparent substrate, the transparent or semi-transparent substrate is scanned with a linearly polarized laser beam generated by a femtosecond laser and exceeding a predetermined energy / pulse threshold along a scanning path. Sub-diffraction limit structures are formed as periodic planes of modified material in the transparent or semi-transparent substrate extending along the scanning path. The modified material can then be chemically etched to form cavities.

The present invention relates to an ultrasound imaging system in which the scan head either includes a beamformer circuit that performs far field subarray beamforming or includes a sparse array selecting circuit that actuates selected elements. When used with second stage beamforming system, three dimensional ultrasound images can be generated.

A microlouver includes a periodic structure in which a transparent layer and a light absorption layer are alternately disposed with a constant, repetitive period. The range of the exit direction of a light beam passing through the transparent layer is restricted by the light absorption layer. The periodic structure includes a periodic structure portion divided in the direction that intersects the direction in which the transparent layer and the light absorption layer are repeatedly disposed. In the periodic structure portion, between the periodic structures adjacent to each other, there is a difference of 180 degree in the phase of spatial frequency of each periodic structure.

An organic light emitting display device includes a substrate including a plurality of pixel regions and a plurality of transparent regions, thin film transistors disposed in the pixel regions, an insulation layer disposed on the thin film transistors, first electrodes electrically contacting the thin film transistors, a pixel defining layer including a black material disposed on the first electrodes, organic light emitting structures disposed on the pixel defining layer, and a second electrode disposed on the organic light emitting structures. The pixel defining layer may define an asymmetrical configuration of adjacent transparent regions disposed on opposing sides of corresponding pixel regions.

The invention relates to a method for producing a stranded inner conductor (1), and to a coaxial cable (9). In a first step, a stranded inner conductor (2) is provided, which consists of several wires (3) twisted together. Then the stranded inner conductor (1) is rotary swaged by means of a rotary swaging device (10). In a further step, the rotary swaged stranded inner conductor (3) is enclosed with a dielectric (4). In a further step, the dielectric (4) is enclosed with an outer conductor (5) and a cable sheath (6).

An apparatus and methodology is presented for magnetically conditioning any fluid or gas transported through a conduit, pipe or by other means. The object of the invention is to advance the art by increasing the range of application, the effectiveness, simplicity and ease of use of a magnetic fluid conditioning device. The invention accomplishes this by a unique magnetic and mechanical configuration, not taught in the art or previously known to the applicants.

The invention provides a process and apparatus for treating water, which can be stably operated with high efficiency over a long period of time. The apparatus has a grounding electrode and a pair of applying electrodes connected to a DC voltage source through a register and first and second high-frequency switches which are controlled by a high-frequency switching commander circuit, to convert DC voltage from the DC voltage source to AC voltage to be fed to the applying electrodes. The high-frequency switching commander circuit is connected to a first high-frequency oscillation circuit connected to a control circuit which is controlled by a second high-frequency oscillation circuit, to provide a signal changing randomly in frequency as output signal from the first high-frequency oscillation circuit. The second high-frequency oscillation circuit also controls a flip-flop circuit connected to the first high-frequency oscillation circuit, to add acutely and momentary frequency fluctuating portions in randomly frequency changing signal from the first oscillation circuit.

The present invention relates to a light extraction substrate for an organic light-emitting element, a method for manufacturing the same and an organic light-emitting element including the same, which can shed its dependence on light extraction in a specific wavelength range appearing in a light determining pattern of a cyclical form and induce light extraction in a broader wavelength range. To this end, the present invention relates to a light extraction substrate for an organic light-emitting element, a method for manufacturing the same and an organic light-emitting element including the same. The light extraction substrate is disposed on one surface through which light emitted from the organic light-emitting element is outwardly released and comprises: a base substrate; a light determining pattern formed on the base substrate; and a leveling layer formed on the light determining pattern and having a surface contacting the organic light-emitting element, wherein a plurality of air voids having a random shape and size are irregularly distributed on an interface between the light determining pattern and the leveling layer.

The present invention relates to an ultrasound imaging system in which the scan head either includes a beamformer circuit that performs far field subarray beamforming or includes a sparse array selecting circuit that actuates selected elements. When used with second stage beamforming system, three dimensional ultrasound images can be generated.

A microlouver includes a periodic structure in which a transparent layer and a light absorption layer are alternately disposed with a constant, repetitive period. The range of the exit direction of a light beam passing through the transparent layer is restricted by the light absorption layer. The periodic structure includes a periodic structure portion divided in the direction that intersects the direction in which the transparent layer and the light absorption layer are repeatedly disposed. In the periodic structure portion, between the periodic structures adjacent to each other, there is a difference of 180 degree in the phase of spatial frequency of each periodic structure.

An apparatus and methodology is presented for magnetically conditioning any hydrocarbon based fluid flowing through a conduit or pipe. The object of the invention is to advance the art by increasing the range of application, the effectiveness, the simplicity and the ease of use of a magnetic fluid conditioning device. The invention accomplishes this by a unique magnetic and mechanical configuration, not taught in the art or previously known to the applicants.

A display device includes: i) a substrate member having a transparent area and a plurality of pixel areas, the pixel areas being spaced apart from each other along a first direction and a second direction, the transparent area located between the pixel areas, the second direction being perpendicular to the first direction; and ii) an emission layer located at each of the pixel areas. Among the plurality of pixel areas, a width of the transparent area along the first direction between two pixel areas varies along the second direction. The first direction may be the horizontal direction of a screen realized by the substrate member, the second direction may be a vertical direction, and the emission layer may have a width along the horizontal direction that varies along the vertical direction.

The invention provides a beam control method based on a frequency diversity array antenna. The method comprises the steps of establishing a random frequency offset antenna array transmission signal model by setting a transmission frequency offset of each antenna array element transmission signal in the antenna array to be distributed uniformly; according to spatial position information of a desired target, calculating a received signal model at the desired target spatial position; calculating a weight coefficient of each antenna element in the antenna array according to the received signal model; and controlling the transmission of each antenna array element transmission signal according to the weight coefficient of each antenna element to form a beam. The method sets the frequency offsetsto be distributed uniformly based on the traditional frequency diversity antenna, and can effectively eliminate the periodicity in the distance dimension during the beam transmission process of the antenna array elements, thereby enhancing the signal receiving power at the target.

Method and system for tracking between two communications participants of an optical satellite communications system to provide a communication connection between the two communications participants. The method includes transmitting a signal from a first of the two communications participants to a second of the two communications participants, in which the second communications participant includes a detector arrangement with a plurality of detectors in a common receiving plane. The method also includes acquiring a phase of the signal at each of the plurality of detectors and determining phase differences between the phases via a phase-processor, determining from the phase differences a phase angle of an alignment of the signal to the receiving plane, processing the phase angle with a tracking computer in order to align the receiving plane of the second communications participant with the signal, whereby the phase difference becomes zero, and continuously calibrating the plurality of detectors of the detector arrangement.