Abstract:
An apparatus for carrying out Raman spectroscopy on a sample (5) comprises: a light source (1 ) for providing a beam (15) of excitation radiation, and an optical system (101 ) providing an optical light path for directing the beam (15) of excitation radiation to the sample (5) and for directing a beam (16) of scattered light from the sample (5) to a detector (14), the optical system (101 ) comprising a spectrograph (8), the spectrograph (8) comprising a grating (12), in particular a transmission grating, adapted to divide the beam (16) of scattered light into a spectrum of spatially separated wavelength components (17) and to direct at least a portion of the spectrum to the detector (14), the spectrograph (8) comprising a first lens system (13) in the light path between the grating (12) and the detector (14) for focussing the portion of the spectrum onto the detector (14), the optical system comprising at least a second lens system (103, 147), in particular in the light path between the light source (1 ) and the sample (5), and the second lens system (103, 147) being configured to provide a first focal plane with at least a first focal point (105, 105a, 105b) in the optical path for focussing the beam (15) of excitation radiation and/or the beam (16) of scattered radiation at the first focal point (105, 105a, 105b), and the apparatus comprising a reference sample (107) arranged in the focal plane, in particular at the first focal point (105, 105a, 105b), for obtaining a reference spectrum from the reference sample (107).
Abstract:
A system and method for imaging a sample using Raman spectrometry. Optical fibers having opposite first ends and second ends are arranged with the first ends and second ends in respective two-dimensional arrays. The two-dimensional arrays maintain relative positions of the optical fibers to one another from the first ends to the second ends in a way that the first end of each optical fibers of the bundle can simultaneously collect a corresponding Raman signal portion scattered from specific spatial coordinates of the area of the sample. The so-collected Raman signal portions are propagated towards the corresponding second end, from which are outputted and detected simultaneously using an array of detectors.
Abstract:
A compact device (210) useful for measuring an absorption spectrum of a liquid, such as water with organic contaminants, is provided. The compact device (210) comprises an array of LEDs (121,122,123,124) each emitting light with a unique spectral peak. A reflector (130) shaped as a half ellipsoid reflects the emitted light (180a,180d) to form a reference beam (181a,181b). The reflector (130) has an opening (136) to allow part of the emitted light (180b,180c) to form a measurement beam (182a,182b) after passing through the liquid. Two photodetectors (140,150) measure the reference beam (181a,181b) and the measurement beam (182a,182b) to give a reference intensity and a measured intensity, respectively. The LEDs (121,122,123,124) sequentially emit showers of light one-by-one, giving plural pairs of reference and measured intensities for estimating the absorption spectrum. The compact device (210) receives energy from a separate power-providing device (230) through wireless power transfer. The power-providing device (230) harvests motional energy of the flowing liquid to generate electrical energy.
Abstract:
Embodiments disclosed herein are directed to multi-test assay systems for analyzing biological material and methods of using such multi-test assay systems. For example, the multi-test assay system can detect or identify one or more biological markers representative of or corresponding to an illness or disease.
Abstract:
First and second laser devices irradiate a sample in a laser excitation with a laser probe pulse of the second laser device and a time resolved impulsive laser excitation via the first laser device. Coherent Raman signals are generated from the sample over a spatial extent (x- y). Raman signals received from the sample are diffracted via a grating (RG) to a condenser (CM) in order to pass through the tunable spectral filter (SLM) operating in the Fourier plane to keep the size of the spatial dependence minimal. The beam expander (SL+, SL2) and dispersion stage /TG) are arranged for expanding the signal by the beam expander; and propagating through the dispersion stage, such that the spatial dependence become the dominant part in the convolution product at the position of the image sensor (CCD).
Abstract:
Eine Spektrometeranordnung (10) mit zweidimensionalem Spektrum enthaltend ein erstes dispergierendes Element (31) zur spektralen Zerlegung von Strahlung in einer Hauptdispersionsrichtung, eine abbildende Optik (17) zur Abbildung der durch einen Eintrittsspalt (15) in die Spektrometer-Anordnung (10) eintretenden Strahlung in eine Bildebene, mit der ein zweidimensionales Spektrum erzeugbar ist, und einen Flächendetektor (39) mit einer zweidimensionalen Anordnung einer Vielzahl von Detektorelementen in der Bildebene, ist dadurch gekennzeichnet, dass ein Reflektor, ein Refraktor, ein Linsenarray oder ein anderes optisches Element im Strahlengang an einem Ort angeordnet ist, wo die dispergierten, monochromatischen Bündel getrennt vorliegen, und der Reflektor, der Refraktor, das Linsenarray oder das andere optische Element eine Oberfläche in Form einer Freiformfläche aufweist, bei der die eingenommene Fläche ausgewählter Bilder des Eintrittsspalts bei verschiedenen Wellenlängen in der Bildebene über einen ausgewählten Spektralbereich des zweidimensionalen Spektrums optimiert ist.
Abstract:
A monolithic spectrometer (10) for spectrally resolving light (L), comprises a body (2) of solid material having optical surfaces (3,4,5,6a-6c,8) configured to guide the light (L) along an optical path (E1,E2,E3,E4) inside the body (2). The optical surfaces of the body (2) comprise a segmented focusing surface (6a,6b) comprising first and second continuously functional optical shapes (Ca,Cb) to focus received parts of respective beams (La,Lb) onto respective focal position (fa,fb) in an imaging plane (P) outside the body (2). The second continuously functional optical shape (Cb) is separated from the first continuously functional optical shape (Ca) by an optical discontinuity (Dab) there between.
Abstract:
A compact spectrometer includes an excitation light source configured to generate excitation light and arranged to illuminate a spot on a sample. A dispersive element includes at least one movable component and spatially separates output light emanating from the sample in response to the excitation light into a plurality of different wavelength bands. A moveable component of the dispersive element causes the plurality of different wavelength bands of the output light to be scanned across a detector. The detector includes at least one light sensor that senses the wavelength bands of the output light and generates an output electrical signal in response to the sensed output light.
Abstract:
An optical radiation source produced from a disordered semiconductor material, such as black silicon, is provided. The optical radiation source includes a semiconductor substrate, a disordered semiconductor structure etched in the semiconductor substrate and a heating element disposed proximal to the disordered semiconductor structure and configured to heat the disordered semiconductor structure to a temperature at which the disordered semiconductor structure emits thermal infrared radiation.
Abstract:
In one implementation, a spectral microscope may comprise a substrate with a planar lens, the planar lens including a phase profile including an axial focus and an oblique focus, a light source to excite a signal of a particle among a plurality of particles, and a detector to receive light generated from the light source from the axial focus of the planar lens and a spectral color component of the excited signal of the particle from the oblique focus of the planar lens.