Abstract:
An absolute transmission accessory for a spectrometer. One example spectrometer system includes a base plate, a light source configured to transmit light, and an interferometer mounted to the base plate. The interferometer receives the light from the light source and output modulated light. The spectrometer system includes a first optical element configured to receive the modulated light and direct the modulated light, and a second optical element configured to receive the modulated light and focus the modulated light to a sample compartment. The spectrometer system includes a detector compartment including one or more detectors, the detector compartment configured to receive light from the sample compartment. The spectrometer system includes a sample holder coupled to the base plate. The modulated light is directed to the sample holder, and light exiting the sample holder is directed through the sample compartment and to the detector compartment via the second optical element.
Abstract:
A spectral imaging system comprises: a sequential optical system providing a temporal sequence of output light beams describing the scene; a color imager receiving the output light beams and responsively generating, for each output light beam, an image signal that is spatially resolved into a plurality of color channels. The system can also comprise an image processor that collectively process the image signals to construct a spectral image of the scene.
Abstract:
A device for use with a smart phone or tablet, the device comprising: a measurement device including a light source comprising a plurality of light emitting diodes for measuring one or more physiological parameters, the measurement device configured to generate an input optical beam with one or more optical wavelengths, wherein at least a portion of the one or more optical wavelengths is a near-infrared wavelength between 500 nanometres and 2500 nanometres; the measurement device comprising one or more lenses configured to receive and to deliver a portion of the input optical beam to a sample, wherein the sample reflects at least a portion of the input optical beam delivered to the sample; the measurement device further comprising a receiver to receive at least a portion of the input optical beam reflected from the sample; the light source configured to increase a signal-to-noise ratio of the input optical beam reflected from the sample, wherein the increased signal-to-noise ratio results from an increase to the light intensity from at least one of the plurality of light emitting diodes and from modulation of at least one of the plurality of light emitting diodes; and the measurement device configured to generate an output signal; the device configured to communicate with the smart phone or tablet, the smart phone or tablet comprising a wireless receiver, a wireless transmitter, a display, a voice input module, a speaker, and a touch screen, the smart phone or tablet configured to receive and to process at least a portion of the output signal, wherein the smart phone or tablet is configured to store and display the processed output signal, wherein at least a portion of the processed output signal is configured to be transmitted over a wireless transmission link.
Abstract:
In a system for analyzing optical properties of an object (350) a point source of light (100) composed of multiple spectral bands each having a respective amplitude, phase and polarization is converted by first optics (120, 150) into a line light source to illuminate an object line on the object. A beam splitter (200) splits the light exiting the first optics and directs a first portion of light on to the object (350) as an illuminated line and a second portion of the light on to a reference mirror (450). Second optics (500) collects respective first and second lines of light reflected by the object and mirror of and collinearly images the reflected lines of light as an image line on to an imaging spectrometer (550) wherein mutual interference allows determination of the optical properties of the object at each point along the object line.
Abstract:
One aspect of the invention concerns a method for characterization of a light beam, comprising the following steps: - separation of the light beam by means of a separator optic into a first sub-beam and a second sub-beam; - propagation of the first sub-beam over a first optic and of the second sub-beam over a second optic, said first and second optics being respectively arranged so that the first sub-beam on leaving the first optic, referred to as the "reference beam", and the second sub-beam, on leaving the second optic, referred to as the "characterized beam", are separated by a time delay τ sweeping a time interval T1 with step P1; - recombination of the reference beam and the characterized beam by means of a recombiner optic in such a way that the beams spatially interfere and form a two-dimensional interference pattern; - measurement of said two-dimensional interference pattern by means of a measurement system, as a function of the time delay τ sweeping the time interval T1 with step P1, in order to obtain a temporal interferogram; - calculation of the Fourier transform in the frequency domain of at least one spatial point of the temporal interferogram, said Fourier transform in the frequency domain having a frequency central peak and first and second frequency side peaks; - calculation of the spectral amplitude A R(ω) and of the space-spectrum phase φR(x,y,ω) for one of said first and second frequency side peaks of said Fourier transform in the frequency domain.
Abstract:
There is provided a method for analyzing optical properties of an object, including utilizing a light illumination having a plurality of amplitudes, phases and polarizations of a plurality of wavelengths impinging from the object, obtaining modified illuminations corresponding to the light illumination, applying a modification to the light illumination thereby obtaining a modified light illumination, analyzing the modified light illumination, obtaining a plurality of amplitudes, phases and polarizations maps of the plurality of wavelengths, and employing the plurality of amplitudes, phases and polarizations maps for obtaining output representing the object's optical properties. An apparatus for analyzing optical properties of an object is also provided.
Abstract:
An apparatus and method are provided. In particular, at least one first electro-magnetic radiation may be provided to a sample and at least one second electro-magnetic radiation can be provided to a non-reflective reference. A frequency of the first and/or second radiations varies over time. An interference is detected between at least one third radiation associated with the first radiation and at least one fourth radiation associated with the second radiation. Alternatively, the first electro-magnetic radiation and/or second electro-magnetic radiation have a spectrum which changes over time. The spectrum may contain multiple frequencies at a particular time. In addition, it is possible to detect the interference signal between the third radiation and the fourth radiation in a first polarization state. Further, it may be preferable to detect a further interference signal between the third and fourth radiations in a second polarization state which is different from the first polarization state. The first and/or second electro-magnetic radiations may have a spectrum whose mean frequency changes substantially continuously over time at a tuning speed that is greater than 100 Tera Hertz per millisecond.
Abstract:
Provided is an analysis target region setting apparatus that can accurately set an analysis target region, based on an observation image of a sample obtained with an optical microscope and the like irrespective of texture on the sample surface when the analysis target region is set therein. The analysis target region setting apparatus according to the present invention divides the observation image into a plurality of sub-regions based on pixel information on each pixel constituting the observation image. Subsequently, consolidation information on each sub-region is calculated, and two adjacent sub-regions themselves are consolidated based on the consolidation information. According to this, it is possible to divide the observation image into sub-regions having similar pixel information with a disregard of noise attributed to the shape of a surface and the like. A user designates one sub-region from among the sub-regions finally obtained, as the analysis target region.
Abstract:
Die Erfindung betrifft ein Verfahren, mit dem aus Terahertz-Pulsen örtlich und zeitlich separierte Terahertz-Subpulse mit eindeutiger Zeit-Ort-Beziehung erzeugt werden, welche die Möglichkeit ortsaufgelöster Messungen mittels THz-Zeitbereichsspektroskopie eröffnen, ferner eine Messeinrichtung zur Realisierung dieses Verfahrens, aufweisend ein THz-Zeitbereichsspektrometer mit einer erfindungsgemäßen Optik zur Erzeugung solcher THz-Subpulse, ein modular aufgebautes Messsystem mit mindestens einer solchen Messeinrichtung sowie eine Verwendung des Verfahrens, der Messeinrichtung und des Messsystems zur Fehlererkennung und -lokalisierung, insbesondere zur zerstörungsfreien Inline-Qualitätskontrolle bei der kontinuierlichen industriellen Fertigung bandförmiger Endlosprodukte, z. B. Papier- und Kunststoffbahnen, mit elektromagnetischer Strahlung im THz-Bereich.