摘要:
A feeding tube position confirmation device (102), operable to confirm the position of a predetermined portion of a medical feeding tube in a predetermined portion of a human or animal body, the position confirmation device comprising an optical waveguide (106) dimensioned to be insertable into the lumen of the feeding tube, the optical waveguide having a sensing distal end (108) comprising a distal end material and a sensing material mixed with the distal end material, the sensing material operable to provide a change in optical properties at the distal end (110) of the optical waveguide dependent on the environment to which the sensing distal end (108) of the waveguide is exposed. The sensing material may comprise a reflective material. Methods of manufacture and use of such devices are also described.
摘要:
A spectral reflectance imaging device for detecting nanoparticle exosome biomarker targets includes an illumination source that illuminates a substrate with a plurality of separate wavelengths of incoherent light. The substrate includes an oxide layer and a binding agent to selectively bind nanoparticle exosome biomarker targets to the substrate. An imaging device bindings the light reflected from or transmitted through the substrate and an image processing system detects the nanoparticle exosome biomarker targets a function of the change in reflective properties of the substrate.
摘要:
An optical sensor comprising first and second photoresponsive components that are each configured to fluoresce, responsive to excitation by light of a first wavelength, and emit light including a second and a third wavelength respectively; wherein the fluorescence of said first component varies with oxygen concentration of a medium with which the sensor is in contact, and the fluorescence of said second component varies with carbon dioxide concentration of a medium with which the sensor is in contact.
摘要:
The invention describes generating and use of a multi-layer plasmonic slide, wherein the plasmonic slide comprises at least 6 layers of metallic nanoparticles that can enhance the detection of fluorescent signals and wherein the plasmonic slide can be printed as a microarray of any size. The microarray containing the plasmonic slide can further be printed with a protein, a glycan, or an antibody. The multi-layer plasmonic slide is capable of detecting proteins, polynucleotides, and/or glycans at orders of magnitude lower concentration than non-plasmonic substrates.
摘要:
Die Erfindung betrifft ein optisches Sensorsystem, das eingerichtet ist zum Zusammenwirken mit einem mobilen Computergerät, das wenigstens eine Lichtquelle und wenigstens eine Kamera aufweist, wobei das Sensorsystem wenigstens eine Einkoppelschnittstelle zur Einkopplung von Licht von der Lichtquelle des Computergeräts in das Sensorsystem und wenigstens eine Auskoppelschnittstelle zur Auskopplung von Licht vom Sensorsystem zur Kamera des Computergeräts aufweist, wobei das Sensorsystem wenigstens einen optischen Lichtleitpfad aufweist, über den die Auskoppelschnittstelle mit der Einkoppelschnittstelle optisch verbunden ist, wobei in dem Lichtleitpfad wenigstens ein Sensor angeordnet ist, der zur Modifikation des durch den Lichtleitpfad geleiteten Lichts abhängig von einer von außen auf das Sensorsystem einwirkenden physikalischen Größe eingerichtet ist, wobei in dem Lichtleitpfad wenigstens ein Sensor angeordnet ist, der zur Modifikation des durch den Lichtleitpfad geleiteten Lichts abhängig von einer von außen auf das Sensorsystem einwirkenden Einflußgröße eingerichtet ist, wobei das Sensorsystem eine flachbauende planare Haltestruktur aufweist, in die die Einkoppelschnittstelle, die Auskoppelschnittstelle, die Elemente des Lichtleitpfades und das Sensorelement baulich integriert und in fest vorgegebener optischer Anordnung zueinander justiert sind.
摘要:
A pH micro-probe, a temperature micro-probe, and an immuno-based micro-probe each include a shaft for transmitting an input light signal and a tip for inserting into a cell or other substance for measuring pH, temperature, and/or antigens. The pH micro-probe and the temperature micro-probe each include a luminescent material positioned on the tip of the micro-probe. The light signal excites the luminescent material so that the luminescent material emits a luminescent light signal. The luminescent light signal has a property value dependent on the pH or temperature being measured and reflects back through the shaft for being measured by a light signal measuring device. The immuno-based micro-probe includes a reflective material that has an effective refractive index dependent on the number of antigen-antibody bonds present on the reflective material.
摘要:
The invention provides an integrated semiconductor device (100) for detecting fluorescent tags, comprising a first layer (101) comprising a detector element (107), a second layer (102) located on top of the first layer (101) and comprising a rejection filter, a third layer (103) located on top of the second layer (102) and being fabricated from a dielectric material, a fourth layer (104) located on top of the third layer (103) and comprising an optical waveguide, and furthermore a fifth layer located on top of the fourth layer comprising a microfluidic channel (106). The optical waveguide is configured and positioned such that the micro-fluidic channel (106) is illuminated with an evanescent tail of excitation light guided by the optical waveguide. The rejection filter is positioned such that fluorescence from activated fluorescent tags present on top of the fourth layer (104) is filtered before falling onto the detector element (107). The rejection filter is configured to reject the wavelength range of the excitation light and configured to transmit the wavelength range of fluorescence from the activated fluorescent tags towards the detector element (107).
摘要:
We describe a method of selectively detecting the presence of an analyte, the method comprising: providing at least one waveguide, the waveguide having a core comprising porous material; absorbing an analyte sample into said porous material of said core such that said analyte sample is held within pores of said core; waveguiding radiation along said at least one waveguide to an output to provide output radiation; measuring one or more spectral features of said output radiation due to absorption or scattering of said waveguided radiation by said absorbed analyte sample; selectively identifying the presence of a target analyte in said analyte sample from said one or more spectral features. In embodiments spectral features are measured for multiple different waveguide core regions having different physical/chemical properties modified to provide additional selectivity to the target analyte(s), and these measurements combined to identify the target analyte.
摘要:
The present invention relates to a sorption-based sensing system (100) for sensing multiple selected species in a fluid (112). In one aspect, the sensing system comprises an optical conduit (102) for guiding light from an input end to an output end, a detector (108) for detecting at least one feature of the light at the output end associated with the optical characteristic, and an analyzer (110) for determining at least one attribute of at least one of the multiple selected species in the fluid based on the detected feature. The optical conduit includes a sorptive portion (105) having a set of different sorption properties associated with the multiple selected species. The sorptive portion is adapted to be positioned in the fluid to reversibly sorb at least one of the multiple selected species to vary an optical characteristic of the sorptive portion. In another aspect, there is provided a corresponding method for operating the sensing system.
摘要:
The present invention provides a quasi-distributed optical fiber sensor for measuring a chemical component. The sensor adapted at least a linear launching optical fiber (31) at center, and a probe optical fiber (32) enclosing the linear launching optical fiber (31). The probe optical fiber contains a plurality of sensor elements (33, 34, 35), each contains a chemical component sensitive nano-material, which is formed by etching the cladding first and then coating with the chemical component sensitive nano-material.