Abstract:
An analyzer (10) for analyzing chemical properties of a specimen (12) using optical coupling and sensing, has a narrow band light source (16) and an optical probe (32) that is in contact with the specimen (12). Detectors (56) are used for providing electrical outputs as a function of a parameter of the specimen (12), and an optical path (34, 36) couples light from the light source to the probe and also couples Raman scattered light from the specimen and Rayleigh scattered light from the specimen to separate detectors (56, 74). Circuit (14, 68) are coupled to the detectors (56, 74) to provide outputs as a function of the electrical signals received, and one of the detectors (56) is connected to a signal conditioning circuit (68) for controlling the input of the light source (16) and includes an asymmetric discrimination circuit configured to distinguish positive going fluctuations form negative going fluctuations in the output from the detector (56).
Abstract:
L'invention concerne un dispositif (10) comprenant un support (14) comportant un guide d'onde (42) permettant la propagation de lumière à au moins une longueur d'onde générant vers l'extérieur des ondes évanescentes. Selon l'invention le dispositif comprend des moyens de réception d'un échantillon liquide configurés pour réceptionner l'échantillon le liquide au contact du guide d'onde (42) de manière à imprégner le guide d'onde avec une partie de l'échantillon liquide et des moyens actionnables de retrait du contact de l'échantillon liquide d'avec du guide d'onde (42).
Abstract:
A detector (1) for oil condition monitoring includes an optical fibre (4) having a first end (6) and a second end (8) having an end face (10). A sensor body (2) has a reflecting surface (16) and a gap (14) in which a sample of the oil (A) may be received, the second end (8) of the optical fibre (4) being embedded in the sensor body (2) and having an end face (10) spaced from the reflecting surface (16) across the gap (14). Light emitted from the optical fibre (4) can pass through the sample of oil (A) and be reflected by the reflecting surface (16) back into the optical fibre (4). By interferometry of a first light signal reflected internally by the end face (10) and a second light signal reflected by the reflecting surface (16), the condition of the oil can be determined.
Abstract:
Es sind Vorrichtungen zur Bestimmung der Konzentration zumindest eines Gases in einem Probengasstrom mit einer Analysenkammer (10), in die der Probengasstrom und ein Reaktionsgasstrom einleitbar sind, einem Detektor (48), welcher die durch die Reaktion emittierte optische Strahlung misst und einem Verbindungskanal (22), über den die Analysenkammer (10) mit dem Detektor (48) verbunden ist, bekannt. Zur Steigerung der Effizienz und der Messgenauigkeit dieser Vorrichtungen sowie zur Vermeidung von Ablagerungen an den Wänden der Analysenkammer (10) wird vorgeschlagen, dass der Verbindungskanal (22) als Lichtleiter (26) ausgeführt ist, der sich von der Analysekammer ( 10) bis zum Detektor (48) erstreckt.
Abstract:
A Raman spectroscopic detection device comprising at least one microfluidic sample channel; at least one excitation waveguide for exciting a Raman signal and at least one collection waveguide for collecting a Raman signal. The output of the excitation waveguide and the input of the collection waveguide are positioned directly in the microfluidic sample channel.
Abstract:
Analysis methods and apparatus are provided for inspecting a channel, such as a capillary electrophoresis channel, in a device. Configuration and alignment systems are provided, together with optical systems and temperature control.
Abstract:
A method of analysis, instrument for analysis and device for use in such an instrument are provided, which perform a number of processes need to reach a useful result in the context of a wide variety of samples. The sequence of those processes being optimised. A device, instrument using the device and method of use are also provided which offer reliable performance of a heating based process, with minimal condensation and/or sample loss issues.
Abstract:
The present invention relates to an imaging device comprising: an illumination module (1) comprising means for emitting at least one excitation beam; a scanning/injection module (2) comprising an image waveguide (3), the two ends of which, the proximal end (3a) and the distal end (3b) respectively, are connected via a plurality of optical fibres, and scanning/injection means (6) designed to inject the at least one excitation beam in turn into a fibre of the image waveguide (3) and then into the proximal side (3a) of said waveguide and a detection module (4) comprising means for detecting a light flux (14) collected at the distal end (3b) of the waveguide. At least either the illumination module (1) or the detection module (4) is optically conjugate with the scanning/injection module (2) via a conjugating optical fibre (5, 7). The use of conjugating fibres (5, 7) enables the maintenance, repair and updating of the device to be improved. It also enables modal filtering of the excitation beam to be carried out and ensures that the device is confocal.
Abstract:
The disclosure relates to a portable system having a fiber array spectral translator ("FAST") for obtaining a spatially accurate wavelength-resolved image of a sample having a first and a second spatial dimension that can be used for the detection of hazardous agents by irradiating a sample with light, forming an image of all or part of the sample using Raman shifted light from the sample, and analyzing the Raman shifted light for patterns characteristic of one or more hazardous agents.