126 results about "Spectral pattern" patented technology

An optical system for transmitting a stereoscopic image to a right eye and a left eye of a user is disclosed. The system comprises an optical relay device, having a light-transmissive substrate, an input grating, a left output grating and a right output grating. The optical relay device is designed and constructed such that light is diffracted by the input grating, propagates within the light-transmissive substrate via total internal reflection, and diffracted out of the light-transmissive substrate by at least one of the left and right output gratings. The system further comprises an image generating system, optically coupled to the input grating and configured for providing collimated light constituting a left-eye image and a right-eye image wherein the left-eye image is parallactically related to the right-eye image. In various exemplary embodiments of the invention the left-eye image and the right-eye image are spectrally modulated according to different spectral maps, selected to provide different optical information to different eyes.

A method and apparatus for reading a microbead having a code thereon is provided wherein the code is projected on and read from a Fourier plane. The microbead may be 1-1000 microns (um) or smaller in feature size. The code is projected on the Fourier plane by scattering input light off the microbead. The scattered light from the microbead is directed through an optical arrangement having a transform lens for projecting the code on the Fourier plane, and read on the Fourier plane using a charge coupled device (CCD) or other similar device. The code may include periodic layers of material having different refractivities or phase, including index of refraction differences; periodic spatial modulations having a different phase or amplitude; a periodic binary phase change used to code information in the Fourier plane; a photonic crystal used to encode the information on the microbead, wherein a pattern of holes causes interference between incident and scattered light to form spatial and spectral patterns in the far field that are unique to the pattern of holes; or may be formed in the microbead using a single photoactive inner region, a series of longitudinal holes, different fluorescence regions, or concentric rings of material in a preform.

PCT No. PCT/JP98/02567 Sec. 371 Date Jan. 13, 1999 Sec. 102(e) Date Jan. 13, 1999 PCT Filed Jun. 10, 1998 PCT Pub. No. WO98/57146 PCT Pub. Date Dec. 17, 1998Measurement light, which has been emitted from a Xe light source (20) and then linearly polarized by a polarizer (21), is made to be incident at a tilt angle on a region in a silicon substrate (11) with crystallinity disordered by the implantation of dopant ions. And the spectra of cos DELTA and tan psi are measured with a variation of the measurement light, where DELTA is a phase difference between respective components in p and s directions as to the light reflected as an elliptically-polarized ray, and psi is a ratio between the amplitudes of these components. By correlating in advance the spectral patterns of cos DELTA and so on with the thickness of an amorphous region through a destructive test or the like, or by paying special attention to characteristic parts of the patterns of cos DELTA and so on, the thickness or the degree of disordered crystallinity of the amorphous region is estimated. Also, since a variation in the thickness of the amorphous region can be identified based on a variation of cos DELTA before and after a heat treatment, a temperature of the heat treatment can be sensed based on the variation of the thickness. Thus, an evaluation method allowing for nondestructive estimation of the thickness and the degree of disorder of a region, having crystallinity disordered by implanting dopant ions into a semiconductor region at a high level, can be provided.

One embodiment of the present invention provides a system that cancels fan noise in a computer system. During operation, the system obtains a fan noise signal using a microphone. Next, the system generates a spectral pattern based on the obtained fan noise signal. The system then uses the spectral pattern to identify a corresponding cancellation spectrum in an anti-spectra library. Next, the system generates a noise-canceling signal using the cancellation spectrum. Note that the amount of computation required to cancel fan noise is reduced because generating the noise-canceling signal using the anti-spectra library requires less computation than generating the noise-canceling signal using dynamic noise-cancellation techniques.

Pathogenic microorganisms are detected in a wide field of view and classified by Raman light scattered light from these organisms together with digital pattern recognition of their spectral patterns.

The present invention provides an optical system comprises a scanning spectrometer incorporating an electronic light modulator and digital signal processing means. The spectrometer technique combined with optical signal encoding provides the ability to obtain spectral signatures and identify optical patterns of biological tissue. One example of biological tissue scanning includes techniques such as identification of optical patterns of normal and abnormal tissues in addition to the delineation of these spectral patterns between the abnormal and normal tissue. Due to an enhanced signal-to-noise ratio provided by the optical system according to the present invention, this optical system can detect patterns in biological tissue that may be more subtle than those patterns that would be possible to obtain with currently available optical systems.

Methods, systems and mediums are disclosed for aligning mass spectrometry data before the analysis of the mass spectrometry data. The mass spectrometry data may be received from a mass spectrometry machine, and re-sampled using a smooth warping function. To estimate the warping function, a synthetic signal is build using, for example, Gaussian pulses centered at a set of reference peaks. The reference peaks may be designated by users or calculated after observing a group of spectrograms. The synthetic signal is shifted and scaled so that the cross-correlation between the mass spectrometry data and the synthetic signal reaches its maximum value.

This invention relates to localized magnetic resonance spectroscopy (MRS) and to magnetic resonance spectroscopic imaging (MRSI) of the proton NMR signal, specifically to a magnetic resonance spectroscopy (MRS) method to measure a single volume of interest and to a magnetic resonance spectroscopic imaging method with at least one spectral dimension and up to three spatial dimensions. MRS and MRSI are sensitive to movement of the object to be imaged and to frequency drifts during the scan that may arise from scanner instability, field drift, respiration, and shim coil heating due to gradient switching. Inter-scan and intra-scan movement leads to line broadening and changes in spectral pattern secondary to changes in partial volume effects in localized MRS. In MRSI movement leads to ghosting artifacts across the entire spectroscopic image. For both MRS an MRSI movement changes the magnetic field inhomogeneity, which requires dynamic reshimming. Frequency drifts in MRS and MRSI degrade water suppression, prevent coherent signal averaging over the time course of the scan and interfere with gradient encoding, thus leading to a loss in localization. It is desirable to measure object movement and frequency drift and to correct object motion and frequency drift without interfering with the MRS and MRSI data acquisition.

The invention provides a method for standardising an infrared spectrometer based on spectral patterns of constituents of atmospheric air naturally occurring in the spectrometer. The invention also provides a spectrometer applying the method. The method selects a spectral pattern in a recorded spectrum and determines a wavelength dependent position value for a feature, such as the centre of the pattern. This value is compared to a reference value that may be obtained from a spectrum recorded by a master instrument, and a standardisation formula can be determined. The absorption peaks from CO₂ (_g) around 2350 cm⁻¹ are preferred as the selected pattern. The method renders the use of reference samples unnecessary and allows for the standardisation to be performed simultaneously with the recording of a spectrum of a sample of interest.

A measure of abundance is determined for an element or element combination within a sample, the element or element combination having at least one isotopic variant. An isotopic mass spectral pattern is identified for the element or element combination that indicates an expected abundance and expected mass-to-charge ratio difference for each isotopic variant. These are identified relative to the respective abundance and mass-to-charge ratio of a principal isotope. The isotopic mass spectral pattern is compared with mass spectral data from a molecular mass analysis of the sample to identify peak groups, each matching the isotopic mass spectral pattern. A measure of abundance is determined for the element or element combination as a function of the intensity measurement of one or more peaks from each of the identified peak groups.

A signal portion is extracted per frame having a specific duration from an input signal, thus generating a per-frame input signal. The per-frame input signal in the time domain is converted into a per-frame input signal in the frequency domain, thereby generating a spectral pattern of spectra. Peak spectra having peaks are detected in the spectral pattern. A harmonic spectrum is determined, in the peak spectra, having a harmonic structure showing a relationship between a fundamental pitch and a harmonic overtone.

Methods for differentially identifying cells in an instrument employ compositions containing a combination of selected antibodies and fluorescent dyes having different cellular distribution patterns and specificities, as well as antibodies and fluorescent dyes characterized by overlapping emission spectra which form non-compensatable spectral patterns. When utilizing the compositions described herein consisting of fluorescent dyes and fluorochrome labeled antibodies with overlapping spectra that cannot be separated or distinguished based upon optical or electronic compensation means, a new fluorescent footprint is established. This new fluorescent footprint is a result of the overlapping spectra and the combined cellular staining patterns of the dyes and fluorochrome labeled antibodies chosen for the composition. The new fluorescent footprint results in histogram patterns that are useful for the identification of additional cell populations or subtypes in hematological disease.

The present invention provides low-resolution Raman spectroscopic systems and methods for in situ monitoring of drug-eluting devices in a lumen of a subject. A preferred system can employ multi-mode radiation in making in situ Raman spectroscopic measurements of the lumen and/or device. For example, a system can include a light source such as a multi-mode laser, and a light detector to measure spectral patterns and differentiates spectral features of drugs released in a target region. Drug-release curves can be extrapolated or otherwise predicted using the Raman spectrum taken during or subsequent to device insertion and/or activation.

An egg inspecting apparatus (1) of the present invention includes an optical path switching and projecting assembly (30) for automatically selecting one of a plurality of optical paths through which a white source light (11) emitted from a light source (2) is guided and also for sequentially projecting the white source light (11) from the associated optical paths onto eggs held at respective positions, a spectrum converting assembly for spectrally analyzing light which has been transmitted through each of the eggs and converting it into a spectrum, and a determining circuit (5) for determining whether the egg is a normal egg or a bloody egg by using the spectrum so converted. By way of example, a spectrum of an egg is measured and a secondary differential curve is formulated for classification of the eggs according to egg shell colors. By comparing a spectral pattern of the transmitted light of the egg with that of a normal egg for each of the shell colors, and assaying a pattern similarity by means of a correlational assay method, whether the egg is a normal egg or a bloody egg can be determined.

A voice activated apparatus for automatic sequential launching of clay targets for Skeet, Sporting Clays and Trap shotgun sports. The apparatus first detects a voice command and launches target(s) and then detects the gunshot(s) of the shooter to determine the completion of a segment of the shooting sequence and automatically progress to the next segment for activation upon the next voice command. The apparatus comprising a signal processing unit, designed to analyze spectral patterns and signal levels associated with acoustic signals, in order to distinguish the voice command from ambient and gunshot noise and prevent false activation. By tracking the number of gunshots fired by each shooter, the system determines the end of the shooting sequence and controls the number of clay targets allocated to each shooter.

The invention relates to establishment of levofloxacin-induced Shigella drug-resistance gene mutation time sequence models. The establishment method comprises the following main steps: 1, carrying out drug sensitive tests of 12 antibiotics such as levofloxacin and the like on Shigella, and selecting sensitive strains to carry out an induction experiment; 2, detecting MIC0 of levofloxacin on the primary induction strain; 3, inoculating the single colony into a levofloxacin bacterial liquid culture medium to culture; and 4, taking the bacterial solution in the step 3, transferring to the levofloxacin bacterial liquid culture medium to passage the one generation, taking the obtained bacterial solution, transferring to a levofloxacin liquid culture medium to passage the two generations, sequentially carrying out levofloxacin concentration multiplication culture of bacterial before the drug concentration achieves the sensitive and medium critical value, sequentially carrying out levofloxacin concentration increase culture after the drug concentration achieves the sensitive and medium critical value, carrying out induction culture on the strain for 2 days at the concentration when the induced anti-bacterial drug concentration achieves 2, 4 and 8 mug/ml, carrying out induction culture on the well-growing single colony to obtain the induced Shigella drug-resistance spectral pattern, and carrying out mutation analysis on the induced drug-resistance spectral pattern strain.

An apparatus for generating an audio output signal based on an encoded audio signal spectrum is provided. The apparatus has a processing unit for processing the encoded audio signal spectrum to obtain a decoded audio signal spectrum having a plurality of spectral coefficients, wherein each of the spectral coefficients has a spectral location within the encoded audio signal spectrum and a spectral value. Moreover, the apparatus has a pseudo coefficients determiner for determining one or more pseudo coefficients. Furthermore, the apparatus has a replacement unit for replacing at least one or more pseudo coefficients by a determined spectral pattern to obtain a modified audio signal spectrum, wherein each of at least two pattern coefficients has a spectral value. Moreover, the apparatus has a spectrum-time-conversion unit for converting the modified audio signal spectrum to a time-domain.

A mass spectrogram employs a set of controllable electrodes to produce a time varying axially inhomogenous electric field and enhance separation of charged particles by exposing the charged particles to different electric field strengths based on their spatial positions. The fields may be tailored to provide a traveling wave that expands portions of a spectrographic plot of the particles and/or to provide focusing or other effects.