Abstract:
Methods and systems for the quantitative and qualitative determination of one or more exogenous substances within a material are described. A flow of fluorescence-exciting/ablative energy (e.g., laser pulse(s), preferably in the ultraviolet region (e.g. 193-nm)), is directed onto the material to ablate a thin layer (e.g. null0.3-nullm) of the material using photochemical decomposition. Simultaneously, the laser energy induces the fluorescence of the substance(s) of interest within the ablated layer of the material. The fluorescence emitted by the substance(s) of interest is then received by a device (e.g., a spectrometer), which measures the spectrum (i.e. intensity versus wavelength) of the received fluorescence. The fluorescence spectra are then transmitted to a spectral processing device (e.g., a microprocessor or computer) which is programmed or otherwise adapted to determine, on the basis of the fluorescence spectra, whether the substance(s) of interest is/are present in the material and/or the concentration at which the substance(s) of interest is/are present in the material. This process may be repeated for each layer of the material to determine the concentration gradient of the substance(s) of interest in the material.
Abstract:
An apparatus for imaging an array of a plurality of features associated with a sample tile. The apparatus includes a stage that supports the sample tile in an illumination region, and an illumination source having a plurality of LEDs adapted to emit light. At least a portion of the light illuminates the illumination region. Additionally, the apparatus includes an image collecting device adapted to selectively collect images of either a first signal when the illumination source is illuminating the illumination region, or a second signal absent illumination of the illumination region. The first signal has wavelengths effectively different from the wavelengths of the portion of the light emitted by the LEDs that illuminates the illumination region.
Abstract:
An method and device for inspecting for surface defects, internal defects, and surface-adhered foreign matter on semitransparent materials. An illuminating device transmits light, that is then collimated through a collimating lens unit, through an object to be inspected. The light then transmits through the object to be inspected an eventually is detected by a detector. Any defects in the object to be inspected will be detected.
Abstract:
An optical illuminator assembly for an analytical instrument, such as a clinical hematology or a flow cytometer instrument, including a laser diode having a diverging laser beam output, a collimating lens to collimate the diverging laser beam, a spatial filter operating on the collimated laser beam to spatially filter the beam, and a focussing lens to focus the spatially filtered beam into a flow cell containing particles suspended in a moving stream. A beam shaping aperture is preferably inserted between the spatial filter and the focussing lens to shape the laser beam. The spatial filter preferably includes an objective lens, a collimating lens, and a filter aperture interposed between the objective and imaging lenses. The filter aperture is preferably rectangular, having a height to width ratio in the range of 1:2 to 1:3 such that each dimension is on the order of tens of micrometers. The beam shaping aperture is preferably a rectangular aperture having a height to width ratio in a range of from 3:1 to 5:1 such that each dimension is on the order of hundreds of micrometers.
Abstract:
Systems (290) of the present disclosure are directed to detecting species within a fluid, e.g. for multi-gas analysis, using a multi-pass absorption cell (220) and a spectrometer (270). The absorption cell includes a plurality of mirrors (e.g. 230, 240, 250) arranged in a manner such that a detection light traverses multiple passes through the fluid within the absorption cell. In some implementations, the detection light is reflected by the plurality of mirrors to form optical paths in more than one plane. The system also includes an electronic unit, e.g. data processing unit 280, configured to receive and process spectral data from the spectrometer. In some implementations, the electronic unit communicates with at least one computational unit over a communication interface to send a portion of the spectral data for processing. The electronic unit may also receive processed data from the computational unit.
Abstract:
La présente invention concerne un agencement de mesure spectrométrique de produits, tels que des céréales, oléagineux ou produits dérivés. Selon l'invention, l'agencement est caractérisé en ce qu'il comprend un mécanisme de réglage sélectif (17, 18, 19) de la position du faisceau de lumière dans des plans vertical et horizontal et un dispositif de réglage sélectif pour assurer le parallélisme des rayons du faisceau de lumière. L'invention s'applique notamment dans le domaine des céréales.
Abstract:
Vorrichtung zur optischen Detektion von Analyten in einer Probe, mit optoelektronischen Komponenten in Form von mehreren optischen Detektoren zum Empfang von Photonen und mehreren optischen Emittern zum Emittieren von Photonen, bei der mindestens drei Emitter in einer flächigen Anordnung, nicht auf einer Linie, vorgesehen sind, und mindestens drei Detektoren in einer flächigen Anordnung, nicht auf einer Linie, vorgesehen sind, und die Emitter und/oder die Detektoren mindestens drei unterschiedliche Wellenlängencharakteristika aufweisen.