Abstract:
Spectrometer for the analysis of a polychromatic radiation flux which comprises, in a plane, a single radiation-conveying window having two multiplicities of alternating zones with different conveying characters for the radiation flux to be analyzed and such that the pattern of the zone boundaries has an axis of symmetry in that plane and a center of symmetry, the spectrometer also comprising an image-forming apparatus made up of a dispersive system having a spectrum-scanning movement and a collimating system, a receiver for the radiation flux, and means to modulate the radiation flux. The pattern of the zone boundaries and the image-forming apparatus are such that this apparatus casts, in the plane of the single window, a plurality of monochromatic enantiomorphous images of the window provided respectively by the monochromatic radiations constituting the flux to be analyzed, the center of one of these images being, for each position of the dispersive system, coincident with the center of the window.
Abstract:
Methods are provided to identify spatially and spectrally multiplexed probes in a biological environment. Such probes are identified by the ordering and color of fluorophores of the probes. The devices and methods provided facilitate determination of the locations and colors of such fluorophores, such that a probe can be identified. In some embodiments, probes are identified by applying light from a target environment to a spatial light modulator that can be used to control the direction and magnitude of chromatic dispersion of the detected light; multiple images of the target, corresponding to multiple different spatial light modulator settings, can be deconvolved and used to determine the colors and locations of fluorophores. In some embodiments, light from a region of the target can be simultaneously imaged spatially and spectrally. Correlations between the spatial and spectral images over time can be used to determine the color of fluorophores in the target.
Abstract:
Dispositif de mesure d'un spectre d'un faisceau lumineux, dans une plage de longueurs d'ondes préalablement choisie, ledit spectre étant généré par un échantillon à analyser, ledit dispositif de mesure optique comprenant au moins une source lumineuse (12), une cellule de mesure (9) et un détecteur de mesure (17) placés sur un chemin optique de mesure, ledit chemin optique de mesure étant parcouru par un faisceau optique de mesure issu de la source lumineuse (12) et rencontrant la cellule de mesure (9), des moyens d'auto calibration permettant de tenir compte de la dérive éventuelle des sources lumineuses du fait des conditions d'environnement ou d'utilisation, indépendamment de la présence ou de l'absence d'un échantillon à analyser dans la cellule de mesure, lesdits moyens d'auto calibration comprenant des moyens (15) de créer un chemin optique de référence parcouru par un faisceau optique de référence, issu de la source lumineuse et ne rencontrant pas la cellule de mesure, et un détecteur de référence (18). Ledit dispositif de mesure est remarquable en ce qu'il est conçu pour être embarqué dans un véhicule automobile et comporte des moyens (30, 31) de mélanger sélectivement le faisceau optique de mesure et le faisceau optique de référence, le détecteur de mesure (17) faisant également office de détecteur de référence (18).
Abstract:
The present subject matter relates to methods of high-speed analysis of product samples. Light is directed to a portion of a product under analysis and reflected from or transmitted through the product toward an optical detector. Signals for the detector are compared with reference signals based on a portion of the illuminating light passing through a reference element to determine characteristics of the product under analysis. The products under analysis may be stationary, moved by an inspection point by conveyor or other means, or may be contained within a container, the container including a window portion through which the product illuminating light may pass.
Abstract:
A method for the measurement and determination of the concentration of a certain component within a mixed medium by the absorption of infrared light, comprises the steps of - generating a modulated beam of infrared light; - passing said modulated beam of infrared light through the mixed medium; - receiving said modulated beam after having passed though said mixed medium by means of an infrared detector (17); and - receiving and processing electrical signals of said infrared detector (17), said signals being characteristic of the received modulated infrared beam. The measurement is substantially improved and simplified when - the modulated beam of infrared light is generated by means of a modulated broad band infrared light source; - the modulated beam is sent through a wavelength-selective device (16) after having passed through said mixed medium, and before being received by said infrared detector (17); and - a multi-channel detector array (17) is used as said infrared detector.