50 results about "Single sweep" patented technology

Interferometers and autocorrelator based sensors are disclosed that are configured to have multiple sample arms which can be scanned and the backscattered low coherence source light from a sample resolved in a single sweep of one or more variable delays of the sensor. Borescopes and catheters capable of scanning multiple sections or areas of materials and tissues using these sensors are described.

A display apparatus includes a scanning assembly that scans about two or more axes, typically in a raster pattern. A plurality of light sources emit light from spaced apart locations toward the scanning assembly such that the scanning assembly simultaneously scans more than one of the beams. The light sources are positioned such that their beams each illuminate discrete regions of the image field that are substantially non-overlapping with respect to the other discrete regions. The image is thus formed from a set of “tiles”. By activating a first light source during a forward sweep of the mirror and activating a second light source during a reverse sweep of the mirror, two halves a common line can be written during a single sweep of the mirror. Shifting the position of the sources such that the two halves are aligned reduces raster pinch. In alternative embodiments, the same approach is used for imaging. Also, various approaches to controlling the frequency responses of the various scanners are described, including active control of MEMs scanners and passive frequency tuning.

A deflector deflects a light beam emitted from a light source including a plurality of light-emitting units. A scanning optical system focuses the light beam deflected by the deflector on a scanning target surface. A monitoring photoreceiver receives a part of a light beam deflected by the deflector and directed toward an area within a scanning area outside an image area. A detecting unit individually detects emission powers of at least two light-emitting units based on an output signal of the monitoring photoreceiver in a single sweep of scanning.

A double-echo based single-sweep quantitative magnetic resonance T2* imaging method relates to magnetic resonance imaging. Two low-angle excitation pulses of the same deflection angle are used, an evolution period is added after the first excited pulse, two echoes of different evolution time are generated, the two echoes include different horizontal relaxation time, and a shift gradient is added after each excitation pulse so that two echo signals are offset in the center of a signal space. The two echo signals are from the same imaging slice, so that the two echo signals can be separated by utilizing prior knowledge including structural similarity and sparsity of combined edges of the signals, and a proper separation algorithm corresponding to sparse transformation cooperation can be used to separate the two echo signals. T2* calculation is carried out on the two signals obtained by separating to obtain a quantitative T2* image.

The invention discloses a single-sweep irradiance test support for an ultraviolet aging test box. The single-sweep irradiance test support for the ultraviolet aging test box comprises rollers, a bottom frame, a vertical frame, two lead screws, a belt pulley, a synchronous belt, two moving installation blocks, a leveling rod, a plurality of irradiance probes, and a lifting motor; the vertical frame is fixed on the upper end face of the bottom frame; two ends of each of the two lead screws are fixed on the vertical frame through a bearing pedestal and are vertical to the bottom frame; the upper ends of the two lead screws are connected through the synchronous belt; the moving installation blocks are rotatably arranged on the two lead screws; two ends of the leveling rod are fixed on the two moving installation blocks respectively; the plurality of irradiance probes are arranged on the leveling rod at equal intervals; and the lead screws are driven by the lifting motor. During testing, the leveling rod scans up and down once so as to accurately obtain the ultraviolet light irradiance in the ultraviolet aging test box; the higher the installation intensity of the irradiance probes on the leveling rod, the more accurate the measured data is; and the single-sweep irradiance test support can obviously improve the irradiance test accuracy of the ultraviolet aging test box.

The invention discloses a phase-multiplexing-based full-range sweep frequency OCT (Optical Coherence Tomography) imaging method and system. An electrooptical modulator is arranged in a reference arm of the sweep frequency OCT system so as to realize high-speed phase modulation of an interference spectrum. Preset phase change can be kept between adjacent sampling points of the collected interference spectrum through trigger synchronization between a data collecting card and the electrooptical modulator so as to realize collection on phase multiplexing of the interference spectrum in a single sweep frequency period, the data sampling points of the collected interference spectrum are grouped according to corresponding additional phases, the grouped sampling points are respectively mapped in a wave number space with sampling points at equal intervals so as to form phase shift interference spectrum data subsets of the wave number space. Interference spectrum data can be constructed by utilizing the phase shift interference spectrum subsets so as to reconstruct full-range sweep frequency OCT images. On the basis of phase modulation and multiplexing of the interference spectrum in the single sweep frequency period of the electrooptical modulation, the phase shift is fast in speed and high in precision, the image rejection rate is high, and high-sensitivity imaging in an interesting depth area can be realized.

A method for determining at least one optical property of an optical device comprises providing an optical input signal that includes first and second signal components that are modulated at first and second frequencies, respectively, and that have first and second polarization states, respectively. The optical input signal is passed to an optical device. An optical output signal from the optical device is separated into first and second output signals that have third and fourth polarization states, respectively. The first and second output signals are each compared with reference signals at the first and second frequencies to provide four phase shift and amplitude measurements that can be used to determine the at least one optical property of the optical device as a function of wavelength.

A system and method are provided for real-time analysis of text. During a single sweep through the text, a detection tree is used to identify a sequence of characters in the text from a large dictionary of keywords. When a keyword is detected a rule tally database is updated. An intermediate score may be available during the sweep and a final score of the text may be available substantially immediately upon finishing the single sweep. A second text may be analyzed immediately using the same score buffer and rule tally database without updating the rule tally database.

A method of measuring multiple optical characteristics of an optical device during a single sweep of a swept wavelength optical system cyclically changes an input state of polarization on consecutive optical frequency increments of an optical signal within the wavelength range of the swept wavelength optical system. From the measured output states of polarization a wavelength-dependent Jones matrix is calculated, and from the Jones matrix the multiple optical characteristics are determined, which characteristics may include PDL and DGD.

The invention utilizes harmonics of certain clamped ultrasound transducers to generate ultrasound within the liquid of an ultrasonic tank and in a frequency range of between about 100 khz to 350 khz (i.e., “microsonic” frequencies). The application of microsonic frequencies to liquid preferably occurs simultaneously with a sweeping of the microsonic frequency within the transducer's harmonic bandwidth to reduce or eliminate (a) standing waves within the liquid, (b) other resonances, (c) high energy cavitation implosion, and (d) non-uniform sound fields, each of which is undesirable for cleaning and/or processing of semiconductor wafers and other delicate parts. The invention can also drive ultrasonic transducers such that the frequency of applied energy has a sweep rate within the ultrasonic bandwidth of the transducers; and that sweep rate is also varied so that the sweep rate is substantially non-constant during operation. This reduces or eliminates resonances which are created by transducers operating with a single sweep rate. An ultrasound generator of the invention sometimes utilizes amplitude modulation (AM), and the AM frequency is swept over time so as to reduce resonances. AM control is preferably provided by selecting a portion of the rectified power line frequency. In applications which utilize multiple generators, multiple transducers, and one or more tanks, simultaneously, the invention synchronizes the operation of the generators to a common FM signal to reduce beat frequencies between generators. Each such generator can also be adjusted, through AM, to control the process characteristics within the associated tank. Two or more transducers are sometimes used by the invention, in combination, to broaden the overall bandwidth of acoustical energy applied to the liquid around the primary frequency or one of the harmonics. The bandwidths of the transducers are made to overlap such that an attached generator can drive the transducers, in combination, to deliver ultrasound to the liquid in a broader bandwidth. In a single chamber ultrasound system, two or more generators, each operating or optimized to generate a different range of frequencies, are connected to a multiplexer; and the desired frequency range is selected, and hence the right generator, according to the cavitation implosion energy that is desired within the tank chemistry.

A method for generating and compressing multi-sweep-frequency radar signals is provided, based on the idea of reducing the power density of signals on a time-frequency domain. By using a method of circumferentially shifting and superposing a single sweep-frequency signal, sweep-frequency signals multiplexed simultaneously at time and frequency are generated, and for the generated multi-sweep-frequency signals, the sweep-frequency signals are multiplexed simultaneously at time and frequency in a single pulse time period. The multi-sweep-frequency signals multiplexed at frequency are used to perform matched filtering, and then perform segmented accumulation to obtain distance resolution which is inversely proportional to the bandwidth and the signal-to-noise ratio after the single sweep-frequency signal is compressed under the same energy condition, thereby realizing secondary compression on the multi-sweep-frequency signals. The signals generated by the method have higher spectrum utilization rate and lower interception probability, and guarantee the distance resolution and detection distance of a radar.

A single sweep eraser system allows cleaning of a whiteboard with a single, simple and rapid motion across the board. The system provides track brackets and glides that support a cleaning bar applying sufficient pressure to a cleaning pad extending the height of the board to provide broad area cleaning without the need for the user to “lean in” hard against the cleaning pad. The tracks conveniently hold the cleaning bar off to one side of the board for ready access.

The invention belongs to the technical field of data mining and particularly provides a Bayes classifier based on pattern discovery in data flow. A method mainly includes a pattern discovery stage and a classifier establishment stage. In order to establish a Bayes classification model based on patterns in the data flow, a single sweep algorithm FFI is provided for excavating frequent item sets on the continuous data flow through a sliding window model. The method has high performance on the aspects of running time and classification precision, and better adapts to the data flow dynamic environment.

A method for calculating intermodulation noise generated with one or more land seismic sources. The method includes receiving seismic data (g) generated by actuating the one or more land seismic source with a single sweep; selecting a number of detectors (a-f) that detect a subset (ga-gf) of the seismic data (g); estimating earth responses (ha1-hf1) based on (i) the subset seismic data (ga-gf) and (ii) a ground force (gf) of the one or more land seismic source; calculating plural intermodulation noises (noiseA1-noiseF1) for the number of detectors based on the earth responses (ha1-hf1); and removing the plural intermodulation noises (noiseA1-noiseF1) from corresponding detector signals (ga-gf) to mitigate the intermodulation noise effect.

A system and method for measuring the frequency response of a system under test using a single swept-frequency chirp signal. A tapered chirp-frequency test signal is created with a bandwidth defined by first and second frequencies (1101). The test signal is routed to a calibration path (1102), and the output of the calibration path is routed to a digitizer (1103). The output of the calibration path is digitized (1104), and a Fourier Transform of the calibration path output is generated (1105). The test signal is then routed to a test system (1106), and the output of the test system is coupled to the digitizer (1107). The output of the test system is digitized (1108), and a Fourier Transform of the test system output is generated (1109). A normalized frequency- domain representation of the test system is created by dividing the Fourier Transform of the test system output by the Fourier Transform of the calibration path output (1110).

Systems, methods and computer-accessible mediums for providing a radiation(s) can be provided. For example, a hardware arrangement can be configured to provide the radiation(s) that can have a wavelength(s) that continuously changes over time and over a predetermined bandwidth with a predetermined envelope in a single sweep. The hardware arrangement can include a gain arrangement and a controller arrangement, and the controller arrangement can be configured to electronically control the gain arrangement such that the wavelength(s) provided by the hardware arrangement (i) spans a subset of the predetermined bandwidth, or (ii) changes a wavelength dependent distribution in the single sweep.

Systems, methods, and computer readable media to improve integrated circuit (IC) debug operations are described. In general, techniques are disclosed for acquiring/recording waveforms across an under-test IC during a single sweep of a laser scanning microscope (LSM). More particularly, techniques disclosed herein permit the acquisition of an integrated circuit's response to a test signal at each location across the IC in real-time. In practice the test signal consists of a stimulus portion that repeats after a given period. In one embodiment, the IC's response to multiple complete stimulus portions may be averaged and digitized. In another embodiment, the IC's response to multiple partial stimulus portions may be averaged and digitized. As used herein, the former approach is referred to aswaveform mapping, the latter as gated-LVI.

A display apparatus includes a scanning assembly that scans about two or more axes, typically in a raster pattern. A light source emits light toward the scannning assembly such that the scanning assembly simultaneously scans more than one of the beams. The light sourced is positioned such that its beam illuminates a discrete region of the image field. The image may be formed from a set of "tiles" where a single sweep of the scanning assembly scans a pluralit yof beams simultaneously. Various approaches to controlling the intensity of the light to compensate for variations in light source response or optical system response, or to balance the response of a tiles system are described. Among these approaches are scaling data in a buffer, active multiplication, or control of a D/A converter.