Abstract:
A system is provided for probing a body lumen that includes a flexible conduit that is elongated along a longitudinal axis, the flexible conduit having a proximal end and a distal end, at least one delivery waveguide and at least one collection waveguide extending along the flexible conduit, a transmission output of the at least one delivery waveguide and a transmission input of the at least one collection waveguide located along a distal portion of the conduit. A spectrometer is connected to the at least one delivery waveguide and the at least one collection waveguide, the spectrometer configured to perform spectroscopy. A controller system is configured to calculate a distance between the flexible conduit and the wall of the body lumen based on a spectroscopic measurement of the at least one primary radiation signal that traveled between the flexible conduit and body lumen.
Abstract:
Eine Vorrichtung zum Erkennen und Überwachen von Inhaltsstoffen oder Eigenschaften eines Messmediums, beispielsweise von physiologischen Blutwerten, enthält eine Lichtquelle (20) zum Erzeugen von breitbandigem Messlicht (2) und zum Beaufschlagen eines Messbereichs (3) sowie Mittel (9) zum Auffächern des vom Messbereich (3) zurückgeworfenen Analyselichtes (4). Die Vorrichtung weist ausserdem einen Sensor-Array (11) zur Aufnahme des aufgefächerten Lichtes auf. Der Sensor-Array (11), die Lichtquelle (20) und die Mittel zum Dispergieren des Analyselichts (4) sind als kompakte Baueinheit in einem Gehäuse angeordnet.
Abstract:
A method and an apparatus for carrying out a chemical-physical analysis, such as a spectroscopic analysis, an absorption analysis, a scattering analysis, etc. on one or more regions of a sample (11 ), provides prearranging a source (1 ) of a first electromagnetic radiation comprising a plurality of components with respective wavelength, prearranging a plurality of sites (9) distributed on a determined surface to emit the first radiation, arranging such surface facing a corresponding region of a sample (11 ) such that the whole surface thereof is attained by the first radiation, emitting the first radiation on the sample (11) thus causing the emission of a second radiation by the sample (11 ), which is analysed to associate an intensity of the second radiation to each region and wavelength. For each of the wavelength of the first radiation, a wavelength code is selected by which respective components of the first radiation are coded; the coded components are joined together to form the first electromagnetic radiation which is distributed in a plurality of radiation beams. Such beams are conveyed to respective emission sites (9), for each of which an emission site (9) code is selected, a radiation beam being codified by said code. A decoding of the of the second radiation produces a plurality of fractions, each fraction associated to a wavelength of the first radiation such that for each emission site (9) it is possible to instantaneously compare each fraction associated to a respective wavelength with a component of the first radiation having the same wavelength, the components of the first electromagnetic radiation being emitted simultaneously. The steps of wavelength coding and of site coding, and possibly also other coding steps may be earned out subsequently with respect to one another, or at the same time. The method and the apparatus allow reducing the time required to carry out said analysis.
Abstract:
Spectroscopy apparatuses oriented to the critical angle of the sample are described that detecting the spectral characteristics of a sample wherein the apparatus consists of an electromagnetic radiation source adapted to excite a sample with electromagnetic radiation introduced to the sample at a location at an angle of incidence at or near a critical angle of the sample; a transmitting crystal in communication with the electromagnetic radiation source and the sample, the transmitting crystal having a high refractive index adapted to reflect the electromagnetic radiation internally; a reflector adapted to introduce the electromagnetic radiation to the sample at or near an angle of incidence near the critical angle between the transmitting crystal and sample; and a detector for detecting the electromagnetic radiation from the sample. Also, provided herein are methods, systems, and kits incorporating the peri-critical reflection spectroscopy apparatus.
Abstract:
Color calibration of color image rendering devices, such as large color displays (1500, 1600), which operate by either projection or emission of images, utilize internal color measurement instrument (1508) or external color measurement modules (1608) locatable on a wall or speaker. A dual use camera (1910, 1943) is provided for a portable or laptop computer (1900), or a cellular phone, handset, personal digital assistant or other handheld device (1930) with a digital camera (1943), in which one of the camera or a display (1904, 1931) is movable with respect to the other to enable the camera in a first mode to capture images of the display for enabling calibration of the display, and in a second mode for capturing image other than of the display. The displays may represent rendering devices for enabling virtual proofing in a network, or may be part of stand-alone systems and apparatuses for color calibration. Improved calibration is also provided for sensing and correcting for non-uniformities of rendering devices, such as color displays, printer, presses, or other color image rendering device.
Abstract:
A method of Raman detection for a portable, integrated spectrometer instrument includes directing Raman scattered photons by a sample to an avalanche photodiode (APD), the APD configured to generate an output signal responsive to the intensity of the Raman scattered photons incident thereon. The output signal of the APD is amplified and passed through a discriminator so as to reject at least one or more of amplifier noise and dark noise. A number of discrete output pulses within a set operational range of the discriminator is counted so as to determine a number of photons detected by the APD.
Abstract:
A color measurement device designed for use at various stages of an industrial process is provided. The device offers enhanced insensitivity to ambient light, measurement depth variations, and/or ambient or environmental temperature variations. The device may be embodied as an LED-based, non-contact color measurement spectrophotometer. Over- illumination in full-spectrum of the target object facilitates effective color measurements over varying depths of view. Collected light is measured at discrete wavelengths across the entire visual spectrum. The hardened, rugged design and packaging of the measurement device allows color measurement to be performed at various stages of industrial processes wherein the device can add value by enabling enhanced detection of color errors.