Abstract:
Die Erfindung betrifft ein Spektrometer zur Untersuchung der optischen Emission einer Probe mittels gepulster Anregung einer optischen spektralen Emission, mit einer Anregungsquelle, einer Spaltanordnung, wenigstens einem dispersiven Element und mit Detektoren für das emittierte Spektrum, bei dem zwei Strahlengänge mit zwei dispersiven Elementen vorgesehen sind, von denen das erste dispersive Element das Spektrum der Emission auf eine Anzahl ortsauflösender Detektoren abbildet und das zweite dispersive Element das Spektrum der Emission auf eine Anzahl zeitauflösender Detektoren abbildet.
Abstract:
L'invention concerne un spectrographe à fente inclinée comprenant une source lumineuse (1), une fente d'entrée (3), un réseau (4), un détecteur (7) comportant une fenêtre à travers laquelle est transmis le faisceau lumineux diffracté par le réseau (4), une partie du faisceau lumineux diffracté générant des réflexions sur la fenêtre ou entre celle-ci et la surface sensible du détecteur (7). Selon l'invention, le spectrographe à fente inclinée comprend un moyen de compensation apte à compenser les pertes de résolution spectrale générées par les moyens d'inclinaison, ledit moyen de compensation comprenant la fente d'entrée (3, 9) qui est une fente d'entrée inclinée (9) de forme rectangulaire.
Abstract:
The invention is based on a method and a device for identifying properties of moving objects such as articles, materials, layers, inter alia. The data representing the properties of the objects are determined and evaluated by means of a spectral spatially resolved quantitative and/or qualitative analysis in real time. According to the invention, a spatially resolved spectral image of the object region to be measured is generated. Said image, prior to its evaluation, is subjected optically to a spatially resolved spectral masking which permits only selected significant spatially resolved spectral values and/or spectral ranges to pass. Afterwards, said significant spatially resolved spectral values and/or spectral ranges are optically compressed to form a readable data image. By virtue of the combination of the optical masking with an optical data compression, significant spectral data having a plurality of spectral properties can be compressed flexibly to form a new spatially resolved spectral image and the latter can be imaged on a multi- or one-dimensional line. The evaluation of the spectral image of an object takes place very rapidly, such that a high number of parts per second can be identified.
Abstract:
In a spectroscopic microscope, a video image of a specimen is analyzed to identify regions having different appearances, and thus presumptively different properties. The sizes and locations of the identified regions are then used to position the specimen to align each region with an aperture, and to set the aperture to a size appropriate for collecting a spectrum from the region in question. The spectra can then be analyzed to identify the substances present within each region of the specimen. Information on the identified substances can then be presented to the user along with the image of the specimen.
Abstract:
A method for detecting disease in a patient includes providing infrared (IR) light and coupling the IR light through direct lens coupling or through a first group of one or more optical fibers. IR light is reflected from a portion of the patient and collected by a lens arrangement or a second group of one or more optical fibers. The reflected IR light is dispersed into its spectrum which is detected and analyzed. An apparatus suitable for diagnosing a disease in a patient includes an IR light source and optical fiber or direct lens coupling of IR light onto a body part or fluid of the patient. Reflected light from the patient is optically dispersed using a prism or grating. An IR focal plane array receives the optically dispersed light. The spectrum of the reflected IR light is used to provide a diagnosis of disease in the patient by identifying various disease markers or chemical fingerprints. The method and apparatus are capable of non-invasively detecting disease markers in a patient.
Abstract:
A method for detecting disease in a patient includes providing infrared (IR) light and coupling the IR light through direct lens coupling or through a first group of one or more optical fibers. IR light is reflected from a portion of the patient and collected by a lens arrangement or a second group of one or more optical fibers. The reflected IR light is dispersed into its spectrum which is detected and analyzed. An apparatus suitable for diagnosing a disease in a patient includes an IR light source and optical fiber or direct lens coupling of IR light onto a body part or fluid of the patient. Reflected light from the patient is optically dispersed using a prism or grating. An IR focal plane array receives the optically dispersed light. The spectrum of the reflected IR light is used to provide a diagnosis of disease in the patient by identifying various disease markers or chemical fingerprints. The method and apparatus are capable of non-invasively detecting disease markers in a patient.
Abstract:
A multi-spectrum, multi-channel imaging spectrometer includes two or more input slits or other light input devices, one for each of two or more input channels. The input slits are vertically and horizontally displaced, with respect to each other. The vertical displacements cause spectra from the two channels to be vertically displaced, with respect to each other, on a single image sensor on a stationary image plane. The horizontal displacements cause incident light beams from the respective input channels to strike a convex grating at different respective incidence angles and produce separate spectra having different respective spectral ranges. A retroflective spectrometer includes a convex grating that, by diffraction, disperses wavelengths of light at different angles and orders approximately back along an incident light beam. A single concave mirror reflects both the input channel and the dispersed spectrum. A prism, set of mirrors, beam splitters or other optical element(s) folds the input channel(s) of a spectrometer to enable the input(s) to be moved away from the plane of the image sensor, thereby enabling a large camera or other device to be attached to the spectrometer without blocking the input(s). A mounting mechanism enables a curved optical element to be adjusted through lateral and transverse translations, without requiring a gimbal mount.
Abstract:
The present invention provides an optical analysis system for determining an amplitude of a principal component of an optical signal. The principle component is indicative of the concentration of a particular compound of various compounds of a substance that is subject to spectroscopic analysis. The optical signal is subject to a wavelength selective weighting. Spectral weighting is preferably performed by means of spatial light manipulation means in combination with a dispersive optical element. The inventive calibration mechanism and method effectively allows for an accurate positioning of the spatial light manipulation means. Calibration is based on a calibration segment on the spatial light manipulation means in combination with a reference light source and a detector.