Abstract:
The invention relates to a system and a method for optical measurement of a target, wherein the target is illuminated, either actively illuminated, reflecting ambient light, or self illuminating, and a measurement light beam received from the target or through it is detected. The prior art optical measurement systems generally include mechanical filter wheels and photomultiplier tubes, which cause the equipment to be expensive, large-sized and often not sufficiently accurate and stable. The objective of the invention is achieved with a solution, in which the illuminating light beam and/or measurement light beam is led through a Fabry-Perot interferometeror a set of two or more Fabry-Perot Interferometers, and the Fabry-Perot interferometer or a set of two or more Fabry-Perot Interferometersis controlled into different modes during the measurement of a single target. The invention can be applied inoptical measurements where, for example, reflectance, absorption of fluorescence of the target is measured.
Abstract:
An optical measurement apparatus (100) comprises a light source (1) for generating an incident light beam (4), a first optical system (13, 9a, 9b, 9c) for directing said incident light beam from said light source to said microscope objective (25) along an incident beam path, a spectrometer (27) and a measurement detector (7) for measuring secondary light (5) emitted from said sample (23), a second optical system (14a, 14b, 17) for collecting secondary light (5) generated from said sample (23) and for directing said secondary light toward said spectrometer (27) along a return beam path. According to the invention, the apparatus comprises at least one out of a 1 st switching mirror (10) and a 2 nd switching mirror (15), said 1 st switching mirror (10) having a position where it is inserted in said incident light path for directing said incident light beam toward a first detector (6) for optical misalignment detection of said incident beam path and said 2 nd switching mirror (15) having a position where it is inserted in said incident light path for directing said incident light beam along said return beam path toward a second detector for detecting optical misalignment in said return beam path.
Abstract:
Eine Vorrichtung zur Bestimmung der Konzentration von NO 2 in Gasgemischen, insbesondere Abgasen von Dieselmotoren, umfasst eine Lichtquelle zur Ausgabe von Licht in einen Lichtweg; eine Sensoreinrichtung zum Empfang zumindest eines Teils des über den Lichtweg zur Sensoreinrichtung vordringenden Lichtes, wobei der Verlauf des Lichtweges so gewählt ist, dass dieser das zu untersuchende Gas durchsetzt, wobei die Sensoreinrichtung so gestaltet ist, dass diese Signale liefert die das Spektrum des erfassten Lichtes beschreiben; und eine Auswertungsschaltung zur Auswertung der durch die Sensoreinrichtung generierten Signale, wobei die Sensoreinrichtung derart gestaltet ist, die Bestimmung der NO 2 -Konzentration erfolgt indem die Bestimmung innerhalb eines eingeschränkten spektralen Bereiches erfolgt, in dem eine ausgeprägte absolute oder relative Variation des Absorptionskoeffizienten des NO 2 und eine geringe absolute oder relative Variation der weiteren Gase vorliegt. Hierdurch ist es möglich, für die Konzentration von NO 2 im Abgas eines Verbrennungsmotors indikative Signale über einen langen Zeitraum hinweg zuverlässig zu generieren.
Abstract:
The invention relates to a device and a method for optical 3D measurement, wherein the device can be shifted between a first mode for optical 3D measurement using a chromatic confocal measurement method or the triangulation measurement method and a second mode for color measurement. In the first mode, a broadband illuminating beam is focused on a first plane and in the second mode the broadband illuminating beam is focused onto a second plane outside the first plane at a distance d from the surface of the measured object.
Abstract:
The present invention relates to an arrangement for a selection of a wavelength including a wavelength source for providing a plurality of wavelengths, a wavelength selector for allowing a selection of a desired wavelength from the wavelength source, and a wavelength detector to detect a selected wavelength for subsequent use.
Abstract:
Die Erfindung betrifft ein kreisscheibenförmiges Trägersystem mit einer Mehrzahl integrierter Beugungsstrukturen zur Spektralzerlegung von Licht der Wellenlängen 340 - 800 nm, wobei jede Beugungsstruktur eine Schicht aus einem transparenten Kunststoff umfasst, die eine zur Beugung einer innerhalb des Wellenlängenspektrums des Lichts liegende Wellenlänge geeignete Mikrostruktur aufweist, und das Trägersystem mindestens zwei Beugungsstrukturen zur Beugung von Licht unterschiedlicher Wellenlänge umfasst.
Abstract:
The invention provides an optical stimulation apparatus including a light source (2); a scanning unit (4) that scans light from the light source; and an objective optical system (12) that images the light scanned by the scanning unit onto a specimen (A). The scanning unit (4) includes an acousto-optic device that varies the diffraction angle in response to a vibration frequency input thereto.
Abstract:
A fluorescence spectrophotometer system may be implemented in scanning fluorescence polarization detection applications. A wavelength and area scanning fluorescence spectrophotometer system may include a light source, an excitation double monochromator, an excitation/emission light transfer module, an emission double monochromator, a high speed timer-counter circuit board, a precision positioning apparatus for positioning a sample relative to the focal plane of the excitation light, and polarizing filters at the excitation side and the emission side. The system may be operative to analyze more than one fluorescent compound in the sample; additionally or alternatively, the system enables analysis of samples from selected ones of a plurality of samples.
Abstract:
An individualized modeling equation for predicting a patient's blood glucose values is generated as a function of non-invasive spectral scans of a body part and an analysis of blood samples from the patient, and is stored on a central computer. The central computer predicts a blood glucose value for the patient as a function of the individualized modeling equation and a non-invasive spectral scan generated by a remote spectral device. If the spectral scan falls within the range of the modeling equation, the predicted blood glucose level is output to the patient. If the spectral scan falls outside the range of the modeling equation, regeneration of the model is required, and the patient takes a number of noninvasive scans and an invasive blood glucose level determination. The computer regenerates the individualized modeling equation as a function of the set of spectral scans and corresponding blood glucose values.
Abstract:
The invention relates to a method of and a device for measuring optical radiation. In the method, the intensity (2) of a radiation coming from an object (1) to be measured and to be lighted by collimated radiation is measured at several wavelength by focusing the radiation by an optical means (4) and a mirror means (6) on a detector group (3) comprising several detector elements (3a to 3d). The radiation coming from the object (1) to be measured is directed by the optical means (4) and the planar mirror means (6) in such a way that, by rotating the mirror means (6) tilted with respect to its axis (5) round this axis (5) and by keeping the radiation on the surface of the same planar mirror means (6), the focus (F) of radiation is moved in a detector plane (D) along a regular uninterrupted path (R) alternatingly over each detector element (3a to 3d) positioned substantially in the same plane and excited at a different wavelength.