Abstract:
A multimode waveguide device for assays includes a multimode waveguide with a patterned, reflective surface coating. The exposed portion or portions of the reflectively coated waveguide surface are for analyte recognition. A fluidics cell is attached to the waveguide so that the channel or channels of the fluidics cell match with the exposed portion or portions of the waveguide surface. The channel or channels direct one or more sample fluids over the exposed portion or portions of the waveguide surface. The reflective coating minimizes loss and scattering of excitation and fluorescence light during a fluorescence assay.
Abstract:
An apparatus capable of measuring quantities of biological or other types of samples that have been labeled using any of a variety of techniques including fluorescence, radioisotopes, enzyme activated light emitting chemicals and enzyme activated fluorescent materials is provided. The provided scanner includes a source module (113) that preferably contains an internal laser emitting two different wavelengths of approximately the same intensity. An optional external light source may be coupled to the source module, thus adding further flexibility through the addition of other wavelengths (e.g. UV, visible, mid-IR, and IR). The scanner also includes a detection module. Within the detection module (115) are two detectors, thus allowing the simultaneous detection of multiple wavelengths. A bifurcated optical cable (111) is used to transfer the excitation and/or readout light from the source module to the sample and subsequently transfer the emitted and/or scattered light from the sample to the detection module.
Abstract:
The invention relates to an imaging system for optical automatic analysers, especially fluorescence readers. On the sample side, the imaging system contains a cylindrical lens array (6) and a prism array (7), which is arranged upstream of the cylindrical lens array. The prismatic effect of the prisms (7a-7c) of the prism array (7) lies in the direction of the cylinder axes of the cylindrical lenses (6a-6c). Together with a telescopic imaging system (8, 11), the inventive imaging system creates a number of parallel cylindrical focussing volumes between the cylindrical lens array (6) and a detector array (10), these focussing volumes being slanted towards the optical axis of the telescopic system in relation to the vertical. The arrangement enables the detection of fluorescence with a large aperture in one direction, and at the same time enables depth selective analysis of the fluorescence signal, especially the discrimination of the fluorescent radiation originating from the areas around the bases of the sample containers from the fluorescent radiation originating from the solution above. With the focussing volumes that are slanted towards the bases of the sample containers, the imaging system ensures that the fluorescence from the areas around the bases of the sample containers (5a-5c) is detected with the same sensitivity even when the heights of the bases vary in the individual sample containers.
Abstract:
Un détecteur de pollution et de fumée comporte une chambre d'échantillonnage constituée de deux parties en matière plastique moulées. Cette chambre est dotée de deux séries de joints articulés comprenant des écrans (60, 63) qui viennent se superposer pour fomrer une série d'iris disposés au long de la chambre. L'appareil comporte en ses extrémités un récepteur (40) et un absorbeur (20) de lumière séparés par une zone d'échantillonnage d'air où l'on émet un éclair grâce à un module d'émission lumineuse (30) doté d'un nouveau réflecteur (32). Cet ensemble, facile à monter et démonter pour la maintenance, permet également un fonctionnement efficace.
Abstract:
Single or multi-cell reservoir sensors with single illumination sources and one or more detectors per cell unit have an arrangement whereby a gaseous, vapor or liquid sample enters the cell body and interacts with a sensing solution to detect and quantify a given species. Entrance of the sample into the sensor is through an opening in the cell body which may be covered with a membrane to contain the sensing reagent and to presort the species entering the cell. Reservoir cells can be used with organic, inorganic or biochemical sensing materials. A reservoir chemical sensor has a sensor body containing a reservoir cell channel around which source and detector are positioned within the cell body. A replaceable modular reservoir cell which contains sensing solution fits snugly and removably in the channel in the sensor body. Different reservoir cells can be easily inserted and removed from the sensor body. A variety of sensors such as alcohol, drugs of abuse, organic halides, cyanide and inorganic ions are provided.
Abstract:
Un colorimètre utilisé pour mesurer de la lumière transmise, réfléchie, émise et incidente comprend un support monté amovible sur une base et contenant un détecteur sensible aux couleurs ainsi qu'une partie électronique de traitement associé. Le détecteur s'adapte à une des têtes détachables que l'on peut sélectionner afin d'établir des conditions de mesure précises pour les diverses mesures à effectuer. Le colorimètre permet un étalonnage commun et cohérent de tous les éléments de l'industrie de la presse préliminaire, depuis le contrôle d'épreuves en couleur ou de transparences en couleur à l'étalonnage de moniteurs couleur vidéo.
Abstract:
An efficient absorption spectroscopy system (100) is provided for detecting the presence of trace concentrations of gaseous species. In particular, a method of obtaining data regarding a gas analyte, comprising: providing the analyte from a gas chromatography column (130); providing the analyte to a gas flow cell (104); passing VUV wavelengths or less of light from a VUV source (110) through the gas flow cell (104); detecting absorption of the VUV wavelengths or less of light by the analyte through the use of a spectrometer (106, 154, 156) optically coupled to an optical output (142) of the gas flow cell (104); obtaining a three dimensional data set indicative of an amount of absorption of the analyte as a function of wavelength and time; and analyzing the three dimensional data set to determine an identity and quantity of the analyte.
Abstract:
Die Erfindung betrifft Vorrichtungen und Verfahren zum Nachweis von spezifischen Wechselwirkungen zwischen Sonden- und Targetmolekülen. Insbesondere betrifft die Erfindung eine Vorrichtung zum qualitativen und/oder quantitativen Nachweis von molekularen Wechselwirkungen zwischen Sonden- und Targetmolekülen, umfassend: a) einen Mikroarray mit einem Substrat, auf dem auf Array-Elementen Sondenmoleküle immobilisiert sind, wobei der Mikroarray auf einer ersten Fläche der Vorrichtung angeordnet ist; und b) eine Reaktionskammer, die zwischen der ersten Fläche mit dem darauf angeordneten Mikroarray und einer zweiten Fläche gebildet ist, wobei der Abstand zwischen dem Mikroarray und der zweiten Fläche veränderbar ist. Anstelle einer einzigen Reaktionskammer sind mehrere Unterkammern vorgesehen, wobei die Abtrennungen zwischen den Unterkammern nicht bis zur zweiten Fläche hochgezogen sind, so dass zwischen den Unterkammern im nicht komprimierten Zustand der Reaktionskammer eine fluidische Verbindung besteht. Durch Komprimierung der Reaktionskammer können die Unterkammern voneinander abgetrennt werden. Damit lassen sich die Zwischenwände zwischen den Unterkammern durch Zusammenpressen wie Ventile handhaben.
Abstract:
An efficient absorption spectroscopy system is provided. The spectroscopy system may be configured to measure solid, liquid or gaseous samples. Vacuum ultra-violet wavelengths may be utilized. Some of the disclosed techniques can be used for detecting the presence of trace concentrations of gaseous species. A preferable gas flow cell is disclosed. Some of the disclosed techniques may be used with a gas chromatography system so as to detect and identify species eluted from the column. Some of the disclosed techniques may be used in conjunction with an electrospray interface and a liquid chromatography system so as to detect and identify gas phase ions of macromolecules produced from solution. Some of the disclosed techniques may be used to characterize chemical reactions. Some of the disclosed techniques may be used in conjunction with an ultra short-path length sample cell to measure liquids.