Abstract:
A method and an apparatus for carrying out a chemical-physical analysis, such as a spectroscopic analysis, an absorption analysis, a scattering analysis, etc. on one or more regions of a sample (11 ), provides prearranging a source (1 ) of a first electromagnetic radiation comprising a plurality of components with respective wavelength, prearranging a plurality of sites (9) distributed on a determined surface to emit the first radiation, arranging such surface facing a corresponding region of a sample (11 ) such that the whole surface thereof is attained by the first radiation, emitting the first radiation on the sample (11) thus causing the emission of a second radiation by the sample (11 ), which is analysed to associate an intensity of the second radiation to each region and wavelength. For each of the wavelength of the first radiation, a wavelength code is selected by which respective components of the first radiation are coded; the coded components are joined together to form the first electromagnetic radiation which is distributed in a plurality of radiation beams. Such beams are conveyed to respective emission sites (9), for each of which an emission site (9) code is selected, a radiation beam being codified by said code. A decoding of the of the second radiation produces a plurality of fractions, each fraction associated to a wavelength of the first radiation such that for each emission site (9) it is possible to instantaneously compare each fraction associated to a respective wavelength with a component of the first radiation having the same wavelength, the components of the first electromagnetic radiation being emitted simultaneously. The steps of wavelength coding and of site coding, and possibly also other coding steps may be earned out subsequently with respect to one another, or at the same time. The method and the apparatus allow reducing the time required to carry out said analysis.
Abstract:
A system and method for optical spectroscopic measurements is described. One embodiment includes a measurement head for optical spectroscopic measurements, the measurement head comprising an illumination source configured to illuminate a sample, a collection optic configured to view the sample, and an internal reference, wherein the internal reference can be illuminated by the illumination source and viewed by the collection optic.
Abstract:
A spectroscope designed to utilize an adaptive optical element such as a micro mirror array (MMA) and two distinct light channels and detectors. The devices can provide for real-time and near real-time scaling and normalization of signals.
Abstract:
A spectroscope designed to utilize an adaptive optical element such as a micro mirror array (MMA) and two distinct light channels and detectors. The devices can provide for real-time and near real-time scaling and normalization of signals.
Abstract:
A method of arranging and utilizing a multivariate optical computing and analysis system includes transmitting a first light from a light source; generating a second light by reflecting the first light from the sample; directing a portion of the second light with a beamsplitter; and arranging an optical filter mechanism in a normal incidence orientation to receive the portion of the second light, the optical filter mechanism being configured to optically filter data carried by the portion of the second light.
Abstract:
Eine Spektrometer-Anordnung (10) enthält eine Strahlungsqeulle (11) mit kontinuierlichem Spektrum, einen Vormonochromator (2) zur Erzeugung eines Spektrums mit relativ geringer Lineardispersion aus welchem ein Spektrenausschnitt selektierbar ist, dessen spektrale Bandbreite kleiner oder gleich der Bandbreite des freien Spektralbereiches derjenigen Ordnung im Echelle-Spektrum ist, in der die Mittenwellenlänge des selektierten Spektrenausschnitts mit maximaler Blazeeffektivität messbar ist, ein Echelle-Spektrometer (4) mit Mitteln zur Wellenlängenkalibrierung, einen Eintrittsspalt (21) an dem Vormonochromator (2), eine Zwischenspalt-Anordnung (3) mit einem Zwischenspalt und einen ortsauflösenden Strahlungsempfänger (5) in der Austrittsebene des Spektrometers zur Detektion von Wellenlängen-Spektren. Die Anordnung ist dadurch gekennzeichnet, daβ die Breite des Zwischenspalts (3) gröβer ist, als das durch den Vormonochromator am Ort des Zwischenspaltes entstehende monochromatische Bild des Eintrittspaltes und Mittel zur Kalibrierung des Vormonochromators vorgesehen sind, durch welche die auf den Detektor abgebildete Strahlung der Strahlungsquelle mit kontinuierlichen Spektrum auf eine Referenzposition kalibrierbar ist.
Abstract:
A multifunctional infrared spectrometer system (20) has an interferometer (27) which receives the infrared beam from a source (22) and provides a modulated output beam on beam paths to multiple spatially separated infrared detectors (77, 88). A multi-position mirror element (64) mounted at a junction position (63) receives the beam on a main beam path and directs it on branch beam paths to sample positions, with the beam then being directed on the branch beam path to one of the detectors (77, 88). One of the branch beam paths may include a sample holder (80) at the sample position which can index between a position at which a sample is analyzed, to a reference material position, or to a pass-through position for calibration purposes. The multi-position mirror element (64) may also be indexed to direct the beam on a branch path to a fiber optic cable (70, 76) including a probe (71). The multi-position mirror element (64) may be moved to a position at which the beam is directed on a beam path to and through an integrating sphere to a sample.
Abstract:
A system and method are provided for detecting one or more substances. An optical path switch divides sample path radiation into a time of alternating first and second polarized components. The first polarized components are transmitted along a first optical path and the second polarized components along a second optical path. A first gasless optical filter train filters the first polarized components to isolate at least a first wavelength band thereby generating first filtered radiation. A second gasless optical filter train filters the second polarized components to isolate at least a second wavelength band thereby generating second filter radiation. Spectral absorption of a substance of interest is different at the first wavelength band as compared to the second wavelength band. A beam combiner combines the first and the second filtered radiation to form a combined beam of radiation. A detector is disposed to monitor magnitude of at least a portion of the combined beam alternately at the first wavelength band and the second wavelength band as an indication of the concentration of the substance in the sample path.
Abstract:
A compact high performance absorbance detector including a flashlamp light source (12) and folded optics system (14) with a ruled grating reflecting beam splitter (18) for minimizing flash to flash angular pattern and spectral variations of the flashlamp.