Abstract:
A technique facilitates analysis of constituents in leaching operations by utilizing light energy and fiber optic transmission of light during the leaching operations. The light is used in situ in combination with a flow cell to measure desired constituents, e.g. copper, in a fluid flow stream. Additionally, the data obtained via the flow cell may be provided to a data processing system which may be used to automatically provide information, e.g. constituent concentration, within the flow stream. In many applications, the in situ fiber-optic transmission system and flow cell may be used in combination with the data processing system to provide real time information on the flow stream.
Abstract:
A flow cell for a fluorescence spectrometer includes a flow channel to receive a flow of a liquid sample, an excitation light entrance window to receive excitation light from a light source, and an emission light exit window to transmit fluorescent emission light from the liquid sample in the flow channel from the flow cell. The excitation light entrance window and/or emission light exit window includes a waveguide including: a waveguide core formed of a core material; and a cladding medium surrounding a portion of the waveguide core, wherein the cladding medium has a refractive index less than the refractive index of the core material. The waveguide defines a portion of the flow channel.
Abstract:
La présente invention se rapporte à un dispositif (1) d'analyse comprenant : un circuit analytique (3) étanche comprenant une boucle d'injection (BI), au moins une boucle de mélange (BM), et un moyen d'analyse par turbidimétrie (CD), la boucle d'injection, la boucle de mélange et le moyen d'analyse pouvant être parcourus en continu par un liquide; un moyen d'injection (IL) dudit liquide dans ladite boucle d'injection et un moyen de prélèvement dudit liquide à partir d'une source (S); un moyen d'injection (ISR) dans ladite boucle d'injection d'une solution de mise en évidence de sulfates dans ledit liquide par turbidimétrie; et un moyen d'injection (ISP) d'une solution de rinçage comprenant une pompe péristaltique (PPB) et un système de vannes (VF, VG) placées entre la pompe (PPB) et ladite boucle d'injection. La présente invention trouve notamment des applications dans les domaines de l'industrie pétrolière offshore.
Abstract:
The present disclosure provides systems and methods for performing multi-photon imaging using a fiber laser. Systems and methods herein may be used for performing imaging using multi-photon excitation (e.g., using two-photon excitation or multi-color two-photon excited fluorescence). Aspects of the disclosure are applicable to a variety of multi-photon methods without being limited to CRS or multi-photon fluorescence excitation. A multi-wavelength fiber laser system and its use in multi-photon methods are provided.
Abstract:
A method and apparatus for dating a dating a body sample, such as blood, includes taking at least one spectroscopic measurement (37) of the sample at least two predetermined positions in the spectrum having spectral characteristics corresponding to at least two predetermined substances present in the sample that have a time varying relationship with each other. A measured relative concentration of each of the predetermined substances is then determined (41) from the measurement, and the measured relative concentrations of the two predetermined substances is compared (43) with a known variation of the relative concentrations of the two predetermined substances over time. A good fit of the measured relative concentrations to the known variation of the relative concentrations is then determined, so as to provide an indication of the age of the sample (44). Alternatively, instead of measuring the relative concentrations of each of the predetermined substances, the rate of change of the relative concentrations is determined.
Abstract:
A photonic measurement system, such as an atomic absorption spectrometer, includes source, sample and detection modules that are interconnected by fiber optic cables. A first set of fiber optic cables guides light from one or more light sources in the source module to each of at least two analysis chambers in the sample module. A second set of fiber optic cables guides light from the analysis chambers to a detector in the detection module. The detector provides to a processing sub-system signals that correspond to intensities of the guided light. One analysis chamber is selected to perform a sample analysis at a given time, and the processing sub-system processes the signals associated with the selected analysis chamber as measurement signals. The processing sub-system may further process the signals associated with a given non-selected analysis chamber as reference signals.
Abstract:
This invention relates to a fiber optic apparatus for simultaneously measuring the scattering and concentration signals of macromolecules in a flow cell 3. The apparatus is based on the delivery/focusing of both a laser and ultraviolet light source to the same physical position in a low volume flow cell 4, via a bifurcated optical fiber 3. This configuration allows the light scattering and concentration signal changes associated with a macromolecular solution passing through the flow channel to be measured simultaneously. This invention also relates to a method that uses the optical apparatus 10 to determine properties of a macromolecular solution such as the ideal crystallization and/or formulation conditions (via B 22 ) for a given protein solution.
Abstract:
A system and method for measuring fluorescence lifetimes utilizing a light source modulated with a code sequence to interrogate a sample of interest. The system is useful for studying the interaction of chemicals, biomolecules, and other substances. The fluorescence lifetime is used as an indicator of chemical binding and chemical environment. A system and method for measuring photons. The system produces an estimate of the distribution of flight times for photons traveling from the source to the detector. A system and method for optical lymph node mapping. A correlation of a photo-detector signal and a digital code sequence, used to modulated light signal, is calculated to produce an estimate of the distribution of flight times for photons traveling from a given source to a given detector. These distributions are used along with the measured amplitudes to reconstruct a map of contrast agent location within the tissue.