Abstract:
Apparatus (20) for remote laser-based detection of a analyte in a remote target region (4); comprising a reference container (8) for housing a reference substance identical with the analyte; a laser unit (1) which constituted to emit a laser beam of a tuneable wavelength towards the target region (4) to be analysed and along a reference path which passes through the reference container (8) for detecting the reference substance; a laser control means (12,16,17) constituted to control wavelength of the laser beam during detection periods such that the laser wavelength is changed to allow detection of an optical absorption profile of the analyte during detection periods; an analytical detection unit (15, 16, 12) which detects light from the target region and generates analytical signals during the detection periods, a reference detection unit (10,16,12) which detects laser light passed through the reference container and generates reference signals during the detection periods; and an analysing means (12) constituted to analyse the similarity of the analytical and reference signals or of one or more calculated functions respectively calculated from the analytical and reference signals for determining the concentration of the analyte in the target region.
Abstract:
Immuno-chromatographic diagnosis means (1) for detecting and/or quantifying a plurality of analytes present in an essentially liquid sample (E), comprising:
at least one reaction mixture (2) containing recognition biological molecules and/or competitive ligands labelled with at least one visualisation molecule which is detectable in fluorescence, said reaction mixture being present in a separate container of said recovery system (3); and at least one recovery system (3) in the form of a solid support to which are bonded competitive ligands and/or recognition biological molecules at distinct and known recovery locations (4 and 5), which are arranged according to a two-dimensional matrix arrangement defined according to a system of coordinates, so as to identify by the localisation of said recovery locations (4 and 5) on said support, said analytes present in said sample (E).
Abstract:
A system including a light source, sampling tray, and at least three detectors mounted at angles with respect to each other receives light reflected from a sample of cannabis-based matter. Light from the three detectors is fed to a spectrometer which converts the reflected light into a fingerprint corresponding to the concentration of at least one substance in the sample. The fingerprint is processed by a statistical model to determine concentration level of the at least one substance in the sample and the concentration level is then displayed.
Abstract:
Inspecting a retaining ring of a dynamoelectric machine includes placing an optical device in a stationary component of the dynamoelectric machine and directing the optical device toward a radial view of the retaining ring. An image is obtained and transmitted of a circumferential portion of the retaining ring, using the optical device during rotation of the rotor. Identification is made of a location of one or more stress cracks forming and visible at the circumferential portion of the annular edge. Further, a structural condition is determined for at least one location on the retaining ring using a metric to identify a value of the metric exceeding a predetermined acceptable value of the metric.
Abstract:
A cartridge and cartridge system for use in an apparatus for analyzing a sample are provided. The system has a plurality of cartridges for different applications for a multimode instrument. The cartridges are removably engaged with a cartridge support of the apparatus in a “plug-in” format such that one cartridge may be removed from the apparatus and another cartridge may be easily installed. The cartridge support includes a plurality of cartridge positions that receive cartridges concurrently. One of the cartridges may be a luminescence cartridge that includes an integrated detector that is movable toward and away from a sample carrier of the apparatus, and thus toward and away from a sample located at the sample carrier.
Abstract:
A cartridge and cartridge system for use in an apparatus for analyzing a sample are provided. The system has a plurality of cartridges for different applications for a multimode instrument. The cartridges are removably engaged with a cartridge support in a “plug-in” format such that one cartridge may be removed from the apparatus and another cartridge may be easily installed. The cartridge support includes a plurality of cartridge positions that receive cartridges concurrently. One of the cartridges is a wavelength-tunable cartridge in which different light sources, excitation filters, and/or emission filters may be selected. Tuning is further accomplished by tilting the excitation or emission filters at desired angles relative to a beam of exciting light or emitted light.
Abstract:
The present invention is to present a sample analyzer capable of automatically stabilizing the laser diode in multi-mode oscillation. A sample analyzer 1 comprises: a laser diode (LD) 501d for irradiating a sample with laser light; a photodiode (PD) 501e for detecting amount of light emitted from the LD 501d; a APC circuit 501b for outputting a direct current to be supplied to the LD 501d such that the amount of light emitted from the LD 501d is maintained at a predetermined amount, based on the amount of light detected by the PD 501e; a high frequency oscillation circuit 501f for superimposing a high frequency component on the direct current outputted from the APC circuit 501b; and a high frequency automatic adjustment circuit 501c for controlling amplitude of the high frequency component outputted from the high frequency oscillation circuit 501f according to magnitude of the direct current outputted from the APC circuit 501b such that the LD 501d oscillates in a multi-mode.
Abstract:
A compact, portable, clinical instrument dedicated to hemoglobin determination employs an L.E.D. light source with a peak output wavelength of about 553 nanometers and a yellow-blocking filter with a long wavelength cut-off not longer than about 565 nanometers. Thus, the relative amount of energy incident upon the blood sample in the 540 nm. hemoglobin absorption band is maximized. In addition to the L.E.D., the photodetector and the amplifying, inverting, log conversion, digital conversion, display and power supply regulation circuits are also exclusively solid-state. The display is of the reflective or liquid crystal type, and the power supply regulator is a sophisticated integrated circuit containing the equivalent of many discrete components. As a result, current consumption is minimized, and battery life and instrument accuracy are maximized. As an alternative illumination source, an infra-red L.E.D. can be employed, and the instrument is then capable of blood turbidity measurement. In either case, the L.E.D. illumination source is powered by a constant-current regulator, which minimizes errors due to fluctuations in illumination intensity.
Abstract:
A portable device for the quality control of vegetal products comprising a power supply (7) intended for powering a circular crown of lighting lamps (41) at the centre of which there is arranged the receiving objective of a spectrometer (45) provided with means (431) adapted for resting on the product to be checked, said spectrometer (45) being associated to a microprocessor (11) which provides the measurement data on display means (12); according to the invention, the lamps (41) are permanently powered, and in stand-by, at a reduced voltage (70), lower than the nominal voltage (71) delivered by the power supply (7), and instantaneously at the nominal voltage (71 supplied by the power supply (7) through a power circuit (8) whose activation is commanded and controlled by the microprocessor (11) in response to an activation signal generated by a button (10).