Abstract:
Die Erfindung betrifft ein Miniaturspektrometer (10) zur Spektrometrie und zur Bilderfassung, umfassend - eine Detektionseinheit (7) zur Erfassung einer optischen Größe und - eine optische Einheit, umfassend einen Polarisator (2), ein Savart-Element (40), welches ein erstes doppelbrechendes Element (4a) und ein zweites doppelbrechendes Element (4b) umfasst und einen Analysator (5), dadurch gekennzeichnet, dass - im Strahlengang zwischen dem Polarisator (2) und dem Savart-Element (40) ein erstes Flüssigkristallelement (3a) angeordnet ist, welches dazu ausgelegt ist, eine vierte Polarisationsachse (203) von einer aus dem ersten Flüssigkristallelement austretenden Strahlung (103) derart einzustellen, dass die aus dem ersten Flüssigkristallelement austretende Strahlung (103) in einem Abbildungsmodus des Miniaturspektrometers (10) das erste doppelbrechende Element (4a) ohne Aufspaltung durchläuft und die aus dem ersten Flüssigkristallelement austretende Strahlung (103) in einem Spektrometermodus des Miniaturspektrometers (10) im ersten doppelbrechenden Element (4a) in einen ersten ordentlichen Strahl (500b) und einen ersten außerordentlichen Strahl (500a) aufgespalten wird und - wobei im Strahlengang hinter dem Savart-Element (40) der Analysator (5) angeordnet ist und - im Strahlengang hinter dem Analysator (5) die Detektionseinheit (7) angeordnet ist.
Abstract:
A dual-field-of-view (FOV) optical imaging system having a primary FOV and a simultaneously viewable secondary FOV. One example of the system includes an imaging sensor, primary and secondary FOV objective optics configured to receive and output electromagnetic radiation corresponding to the primary FOV and secondary FOV, respectively, imager optics, and a field-of-view selection mechanism disposed between the secondary FOV objective optics and the imager optics and configured to selectively pass the second FOV to the imager optics, the imaging sensor being configured to produce primary FOV image frames and combined image frames that include imagery from both the primary and secondary fields-of-view.
Abstract:
Die Erfindung betrifft eine Messanordnung zur Erfassung eines absoluten Reflexionsspektrums einer Probe (04, 21, 42, 54, 66) in einem Produktionsprozess der Probe (04, 21, 42, 54). Sie umfasst eine Lichtquelle zur Erzeugung vom Messlicht, einen Homogenisator zur Erzeugung einer gleichmäßigen räumlichen Beleuchtungsstärkeverteilung des Messlichtes; einen beweglichen Reflektor (6, 16, 39, 52, 59,62) und einen Empfänger (07, 22, 37, 53) zum Einsammeln des von der Probe (04, 21, 42, 54) und/oder dem Reflektor (6, 16, 39, 52) reflektierten Messlichtes. Erfindungsgemäß ist der Reflektor (6, 16, 39, 52, 59, 62) sowohl für eine Referenzmessung, als auch für eine Probenmessung in einem Beobachtungsstrahlengang positioniert und auf der selben Seite der Probe (04, 21, 42, 4, 66) wie die Lichtquelle angeordnet, um das reflektierte Messlicht dem Empfänger (07, 22, 37, 53) zuzuführen.
Abstract:
A miniaturized spectrometer capable of being held and carried in a person' s hand and including all of the necessary elements for reliable quantification and characterization for laboratory purposes, of a variety of objects, including an analyte in solution, and that is also optionally adaptable for analysis of an analyte in gaseous phase, and/or on or imbedded in a solid surface.
Abstract:
A hyperspectral imaging system and method are described herein for providing a hyperspectral image of an area of a remote object (e.g., scene of interest). The hyperspectral imaging system includes at least one optic, a scannable slit mechanism, a spectrometer, a two-dimensional image sensor, and a controller. The scannable slit mechanism can be a micro-electromechanical system spatial light modulator (MEMS SLM), a diffractive Micro-Opto-Electro-Mechanical Systems (MOEMS) spatial light modulator (SLM), a digital light processing (DLP) system, a liquid crystal display, a rotating drum with at least one slit formed therein, or a rotating disk with at least one slit formed therein.
Abstract:
A controllable light angle selecting device (100) is provided. It comprises a fixed light selecting means (110) adapted to transmit light incident thereon within a limited acceptance angle, optically connected to at least one light redirecting means (120) capable of obtaining a variable angular difference between light entering said light redirecting means (120) and light exiting said light redirecting means. A photometer, comprising a controllable light angle selector arranged in the path of light between a light source and a light measuring sensor is also provided.
Abstract:
The invention relates to spectral instrument engineering and is used for exciting spectra for spectral analysis. The aim of said invention is to develop a small-sized multi-purpose arc spectrum excitation source for alternate and constant voltage having a high performance and a high discharge current stability which makes it possible to set the required value of the arc current prior to the initiation thereof. The inventive arc discharge generator comprises a power supply circuit, a circuit for forming arc current provided with switching transistors, a current-responsive resistance provided with an operating amplifier connected thereto, an LC circuit provided with electrodes connected thereto, a unit for forming a high-voltage arc initiation pulse and a control unit. The circuit for forming arc current comprises a multi-level comparator and a special-purpose processor, a capacitor and an inductance being serially connected to the electrodes. Said multilevel comparator is connected, through the operating amplifiers, to a resistor and the special-purpose processor which calculates the mean square value of a resistive voltage drop. An additional key is connected in parallel to the capacitor.
Abstract:
A system and method for analyzing a sample using Raman spectral light includes a light source, a light detector, a narrow band pass filter and an analyzer. Within the system, excitation light is directed to interrogate the sample. The narrow band pass filter is positioned to receive Raman scattered light produced as a result of the interrogation. The light detector is positioned to receive the Raman scattered light that has passed through the at least one narrow band pass filter. The analyzer contains stored instructions that when executed cause the processor to a) control the light source; and b) process signals produced by the light detector to analyze the sample material, the signals representative of the intensity of the Raman scattered light received by the at least one light detector corresponding to one or more wavenumbers in a high wavenumber region of a Raman signal.
Abstract:
Embodiments herein relate to reflective optical medical sensor devices. In an embodiment, a reflective optical medical sensor device including a central optical detector and a plurality of light emitter units disposed around the central optical detector is provided. A plurality of peripheral optical detectors can be disposed to the outside of the plurality of light emitter units. Each of the plurality of peripheral optical detectors can form a channel pair with one of the plurality of light emitter units. The reflective optical medical sensor device can also include a controller in electrical communication with the central optical detector, the light emitter units, and the peripheral optical detectors. The controller can be configured to measure performance of channel pairs; select a particular channel pair; and measure a physiological parameter using the selected channel pair. Other embodiments are also included herein.