Abstract:
An apparatus for enhancing the selectivity for spectroscopic measurements of analytes in a turbid medium is described. In one example, spatial filters are used to select only certain radii from the medium to be imaged. This selection is accomplished by placing an optical obstruction on the surface of the medium or at an image plane of the surface later in the optical imaging system. In one implementation, this is achieved by placing a fiber bundle at an image plane of the collecting optical system and then using a spacer of appropriate size at the center of the fiber bundle to act as a central obstruction.
Abstract:
An analysis system, tool, and method for performing downhole fluid analysis, such as within a wellbore. The analysis system, tool, and method provide for a tool including a spectroscope for use in downhole fluid analysis which utilizes an adaptive optical element such as a Micro Mirror Array (MMA) and two distinct light channels and detectors to provide real-time scaling or normalization.
Abstract:
Methods for computer-implemented simulation for the interaction of two or more objects are provided. Data describing particles that represent each of the objects is generated from geometric data for objects. The data for each particle describes a mass density, velocity and energy at a position of the corresponding object. The particles are grouped into sectors to define a computational mesh comprising a plurality of sectors, wherein each sector is a volume region at a position in space in which particles associated with the objects may reside. For each of a plurality of select particles, so called neighboring particles are determined that are within a region of influence with respect to a select particle. Computations are performed based on laws of conservation of mass, energy and momentum to produce updated values for mass, velocity, energy, pressure, stress and position for the particles at each of a plurality of time steps. According to one aspect, when determining neighboring particles for a given select particle, a search is made through a limited or bounded volume region with respect to the select particle that consists of the region of influence for the select particle at the previous time step and within those sectors in contact with or bordering the region of influence at the previous time step. According to another aspect, the plurality of select particles are identified as those particles that reside in an active sector, wherein an active sector is a sector that contains, or is adjacent to a sector that contains, particles that is actively involved in the engagement between the two objects. For example, an active sector is a sector that contains, or is adjacent to a sector that contains, at least one particle that has a velocity, pressure or stress greater than a corresponding predetermined amount.
Abstract:
A high speed non-contact beam scanning device (20) sized and shaped to provide the ergonomic benefits of a pen or wand (1). The device is well suited for reading one or two dimensional bar-code (9, 10) or other printed matter. In order to achieve the high density optical packaging necessary for its high performance to size benefits, the device employs a novel in-line or 'axial' gyrating, or 'axial' scan element. Reflected light, which carries information contained on the target, is collected by an internal non-imaging light concentrator (34) and is processed by signal processing electronics (24). Communication from the device is achievable by a cable or by wireless communication technique.
Abstract:
Eine Abtastvorrichtung für die punktweise Ausmessung der Farbeigenschaften eines Messobjekts umfasst eine Auflagefläche für das Messobjekt, einen Farbmesskopf, eine Antriebseinrichtung zur Bewegung des Farbmesskopfs über die Auflagefläche in wenigstens einer Dimension derselben und zur Höhenverstellung des Farbmesskopfs in Richtung senkrecht zur Auflagefläche sowie eine die Antriebseinrichtung ansteuernde und mit dem Farbmesskopf zusammenarbeitende Mess- und Antriebssteuerung. Sie ist mit einer elektronischen Abstandsregelung ausgestattet, welche mittels der Antriebseinrichtung für jeden Messpunkt den Abstand des Farbmesskopfs über dem Messort in Richtung senkrecht zur Auflagefläche auf einen Soll-Messabstand einstellt. Die elektronische Abstandsregelung arbeitet mit vom Farbmesskopf erzeugten Messwerten und daraus berechneten Abstandswerten. Die Abtastvorrichtung ist aufgrund ihrer spezifischen Ausbildung für die berührungslose, hochpräzise Messung auch von kleinsten Messfeldern geeignet und erfordert für die Abstandsregelung keine separaten Messfühler.
Abstract:
A method and apparatus for determining the progress of a disease. A pre-determined vector space is determined where the vector space mathematically describes a reference set of wavelength resolved data at a plurality of time intervals. A sample containing at least one cell is irradiated with light. Target data is collected where the target data corresponds to at least one of light emitted from or scattered by the sample and includes a plurality of spatially accurate wavelength resolved measurements of light. The target data is transformed into the pre-determined vector space for each spatially accurate wavelength resolved measurement of light. A distribution of transformed points is analyzed in the plurality of pre-determined vector space. Based on the analysis, a transition of a disease condition of the sample is classified.
Abstract:
A method for monitoring a process output with a highly abridged spectrophotometer. The method includes securing spectral data for each spectral primary used in a process, measuring spectral data with a highly abridged spectrophotometer for a sample produced by the process, determining an estimated weight for each spectral primary in the sample, and computing spectral data representative of the sample based on the secured spectral data and the determined estimated weight for each spectral primary in the sample.
Abstract:
The invention relates to a device (10) for the simultaneous detection of radiation of different wavelength, comprising a number of base modules arranged one on top of the other, an optical module (16) and an electronic module. One device each for reflecting and/or deflecting radiation of a determined wavelength range is provided in said base modules. The light-detecting elements are associated with one of the devices each. The invention further relates to a base module, to a charging unit, to a method for adjusting the device (10) and to the use of the inventive device (10).
Abstract:
An infrared spectrometry scan of a polymer sample is obtained (10). Using a first set of parameters, the obtained IR scan is compared to a first database (15), and a first hit score is calculated (20). Based on the results of the first hit score, a second database is selected (30) from among a number of databases (30a, 30b, …, 30n) and the obtained infrared spectrometry scan is compared to the various scans contained in the selected database (35) using a parameter set that corresponds to the selected database, and a second hit score is calculated (40). Using the second hit score, another set of parameters (60a, 60b, …, 60x)is selected (60), and the obtained infrared spectrometry scan is compared (65) to the various scans contained in the selected third database using this additional parameter set, and a third hit score is calculated (70). Based on the second and third hit scores, the identity of the brominated flame retardant in the polymer sample is determined (75).
Abstract:
The invention relates to a device (10) for the simultaneous detection of radiation of different wavelength, comprising a number of base modules arranged one on top of the other, an optical module (16) and an electronic module. One device each for reflecting and/or deflecting radiation of a determined wavelength range is provided in said base modules. The light-detecting elements are associated with one of the devices each. The invention further relates to a base module, to a charging unit, to a method for adjusting the device (10) and to the use of the inventive device (10).