Abstract:
A dual-mode includes a light source configured to project a structured illumination from which visible light can be filtered. The dual-mode imager also includes a detector configured to capture both the structured illumination and visible light from the scene. A temporal or spatial filter is used to selectively block visible light from one or more portions of the detector while passing the structured illumination to the one or more portions of the detector.
Abstract:
A hyperspectral imaging system having an optical path. The system including an illumination source adapted to output a light beam, the light beam illuminating a target, a dispersing element arranged in the optical path and adapted to separate the light beam into a plurality of wavelengths, a digital micromirror array adapted to tune the plurality of wavelengths into a spectrum, an optical device having a detector and adapted to collect the spectrum reflected from the target and arranged in the optical path and a processor operatively connected to and adapted to control at least one of: the illumination source; the dispersing element; the digital micromirror array; the optical device; and, the detector, the processor further adapted to output a hyperspectral image of the target. The dispersing element is arranged between the illumination source and the digital micromirror array, the digital micromirror array is arranged to transmit the spectrum to the target and the optical device is arranged in the optical path after the target.
Abstract:
A particle detection and classification system is disclosed. The system determines the size of measured particles by measuring light scattered by the particles. The system simultaneously determines whether measured particles are biological or non-biological by measuring fluorescent light from the particles. The system uses a parabolic reflector, and optionally, a spherical reflector to collect fluorescence light.
Abstract:
A hyperspectral imaging system having an optical path. The system including an illumination source adapted to output a light beam, the light beam illuminating a target, a dispersing element arranged in the optical path and adapted to separate the light beam into a plurality of wavelengths, a digital micromirror array adapted to tune the plurality of wavelengths into a spectrum, an optical device having a detector and adapted to collect the spectrum reflected from the target and arranged in the optical path and a processor operatively connected to and adapted to control at least one of: the illumination source; the dispersing element; the digital micromirror array; the optical device; and, the detector, the processor further adapted to output a hyperspectral image of the target. The dispersing element is arranged between the illumination source and the digital micromirror array, the digital micromirror array is arranged to transmit the spectrum to the target and the optical device is arranged in the optical path after the target.
Abstract:
A method for optically examining the interior of turbid media is provided. The method comprises the steps: providing broad-band light (2); spatially separating a plurality of wavelength bands (2a, 2b,..., 2n) contained in the broad-band light; separately modulating the plurality of wavelength bands (2a, 2b,..., 2n); recombining the plurality of modulated wavelength bands to a beam (11) of spectrally encoded broad-band light; illuminating a turbid medium (8) with the beam (11) of spectrally encoded broad-band light; detecting light emanating from the turbid medium (8) with a detector (9) and demodulating the detected light with a demodulator (10) to provide spectroscopic information.
Abstract:
A photometric device for investigating a sample, comprises an array of radiation sources that are spaced apart from one another, and which are operable to generate radiation that differs from that generated by the other radiation sources in the array. The device includes a lens arrangement for focusing the radiation at a region of space where a sample may be located for example by means of a sample holder, and at least one detector for receiving radiation from the region of space. Preferably, a number of detectors are employed that are spaced apart from one another, and especially about an axis of the device, so that one radiation detector can detect radiation transmitted by the sample and the other detectors can detect radiation scattered by it. The radiation sources may be time division multiplexed so that in each time slot the detectors receive radiation originating from each radiation source. In an alternative embodiment, the radiation from the region of space may be transmitted to the sample via a beam homogeniser, for example an optical waveguide in the form of an optical fibre, which may be used to reduce or remove speckle where laser diodes are employed as the radiation sources. The device may be used to determine the particle size distribution of particles in a sample by a method employing Bayesian inference.
Abstract:
Ein multispektraler Bildsensor mit einem zweidimensionalen Array aus Superpixeln, wobei jeder Superpixel wenigstens fünf Sensorelemente (11) aufweist mit jeweils einem Pixelsensor (14), einer Filterstruktur (12) mit wenigstens einer strukturierten Schicht aus Metall oder polykristallinem Halbleitermaterial, die ansprechend auf elektromagnetische Strahlung eines Wellenlängenbereichs eine höhere Transmission durch die Filterstruktur zu dem Pixelsensor (14) ergibt als für den Wellenlängenbereich umgebende Wellenlängen, wobei die wenigstens fünf Sensorelemente (12) gemeinsam auf einem Halbleitersubstrat (16) integriert sind und paarweise auf unterschiedliche Wellenlängenbereiche ausgelegt sind.
Abstract:
Der erfindungsgemäße Mehrkanal-Detektor dient zur optoelektronischen Messung der spektralen Bestrahlungsstärke von solarer Strahlung oder von Solarsimulatoren für die Photovoltaik gemäß IEC 60891, IEC60904 und ISO/DIS15387. Der Spektralapparat mit einer spektralen Aussonderung mittels einem Verlauffilter kann als ein Multiplex-Spektrometer und als ein Spektralschablonenapparat, d.h. als Referenzzelle mit planmäßiger spektraler Empfindlichkeit eingesetzt werden.
Abstract:
The present invention concerns a device able of illuminating an object on several wavelengths at the same time and of detecting the spectrum of the fluorescence emitted by the object with high spectral resolution and wide bandwidth.