Abstract:
Apparatus and a method for monitoring various conditions of a vehicle structure including an optical sensor comprising an optical fiber bearing a photonic crystal mounted to one end, an interrogation system including an optical signal generator interfacing with one or more of the optical sensors located remotely from the interrogation module, and a method of monitoring the vehicle structural health using the interrogation system.
Abstract:
An optical waveguide (1) has a grating structure (2) in which gratings of different orders are superimposed. When first and second order gratings are superimposed, input light is partially reflected by the first order component and partially coupled out of the waveguide by the second order component. The second order component can also be used to couple external light into the waveguide (1). The grating structure (2) has applications to free space couplers, optical sensors, and suppression of ripples in dispersion compensators.
Abstract:
L'invention est un dispositif et un procédé permettant d'estimer des propriétés optiques d'un échantillon. Le procédé comprend l'illumination de l'échantillon par une première source de lumière, et la formation d'une image de l'échantillon ainsi illuminé, à partir de laquelle une première propriété optique est estimée, en différents points d'une surface de l'échantillon. Le procédé comporte également une mesure d'une propriété optique auxiliaire de l'échantillon, l'estimation de la première propriété optique prenant en compte la propriété optique auxiliaire mesurée sur l'échantillon.
Abstract:
A side illuminated multi point multi parameter optical fiber sensor that requires no sensitive coating is provided. This sensor comprises an optical fiber having at least one removed cladding section as the sensitive region, at least one probing light source that side illuminates the fiber, a power supply, a detector, a signal processor and a display. The sensitive optical fiber is optically affected by the presence of a measurand medium that can fluoresce, phosphoresce, absorb and/or scatter the probing light. This probing light is guided by the fiber core towards a detector which measures the light intensity and this light intensity is correlated with a measurand.
Abstract:
The present invention relates to an optical fibre for use in a system for detection of one or more compounds in a fluid. The optical fibre (100, 101, 202) comprising at least two binding portions (102, 104, 118, 210, 211, 212) separated from each other along the longitudinal direction (106) of the optical fibre (100, 101, 202), wherein each of the at least two binding portions (102, 104, 118, 210, 211, 212) comprises a plasmonic structure (120) and/or a SERS structure (121), and a binding material (126) for binding of one or more compounds, wherein the optical fibre (100, 101, 202) is arranged for receiving light and transmitting light to each of the at least two binding portions, wherein each of the at least two binding portions (102, 104, 118, 210, 211, 212) is arranged such that light transmitted through that binding portion (102, 104, 118, 210, 211, 212) without bound compound is different compared to light transmitted through that binding portion (102, 104, 118, 210, 211, 212) with bound compound, or light reflected back from that binding portion (102, 104, 118, 210, 211, 212) without bound compound is different compared to light reflected back from that binding portion (102, 104, 118, 210, 211, 212) with bound compound. The present invention further relates to a system (200) for detection of one or more compounds in a fluid (103) and an optical fibre (100, 101, 202) for use in such a system (200) and a method (400) using the system (200).
Abstract:
L'invention concerne un système de stockage d'un gaz pour véhicule, ce système comprenant - un conteneur (20) pour le stockage d'un matériau de stockage (50), ce gaz étant stocké par sorption sur le matériau de stockage (50); - un dispositif de mesure (30) du gaz comprenant au moins un guide d'ondes (40) comprenant un coeur (45) entouré d'une gaine (80) en contact avec ledit coeur (45). La gaine (80) comprend au moins une couche et le matériau de stockage (50) forme au moins une desdites au moins une couche de la gaine (80).
Abstract:
An apparatus for detecting an object capable of emitting light. The apparatus includes a light source and a waveguide. The waveguide includes a core layer and a first cladding layer. At least one nanowell is formed in at least the first cladding layer. The apparatus further includes a light detector. The light detector can detect a light emitted from a single molecule object contained in the at least one nanowell.
Abstract:
A calibration tool and method of using the tool to calibrate a fiber optic needle oxygen sensor. The tool includes at least a vial sealingly covered by a septa and containing a supply of particulate oxygen getter within the chamber of the vial. The vial has an open top and is constructed from an oxygen impermeable material. The septa is resealing, needle-penetrable and oxygen impermeable. The supply of particulate oxygen getter is retained within an oxygen permeable sachet.
Abstract:
The invention relates to a method and a device for detecting the transition, in real time, between a first compound and a second compound, of a product that can contain such a first compound and/or such a second compound and circulates in a conduit for supplying said product. From the spectra taken for pure compounds, at least one spectral marker consisting of a function of a plurality of relevant absorbents of the spectra of such a pure compound is determined. Such a spectral marker enables the characterisation of the product to be characterised.