Abstract:
Nuevo modelo de espectrómetro automático de alta sensibilidad, precisión y amplio rango de longitudes de onda. Se basa en un diseño formado por carruseles intercambiadores en donde están alojados diversos elementos ópticos como prismas de Carpenter (difraction grating prism), filtros y sistemas de colimado y enfoque comandados por una tarjeta de control y toma de datos. El carácter automático de todo el sistema de análisis espectral reside en dicha tarjeta electrónica, asistida por el detector de estado sólido. Como característica más notable, el espectrómetro elimina la no linealidad que aparece en estos sistemas ópticos de difracción.
Abstract:
A spectral camera for producing a spectral output has an objective lens (10) for producing an image, a mosaic of filters (30) for passing different bands of the optical spectrum, and a sensor array (40) arranged to detect pixels of the image at the different bands passed by the filters, wherein for each of the pixels, the sensor array has a cluster of sensor elements for detecting the different bands, and the mosaic has a corresponding cluster of filters of different bands, integrated on the sensor element so that the image can be detected simultaneously at the different bands. The filters are first order Fabry-Perot filters, which can give any desired passband to give high spectral definition. Cross talk can be reduced since there is no longer a parasitic cavity.
Abstract:
Systems and methods for standardizing one or more fluorescence scanning instruments to a reference system by separating the effects of drift and normalization. In an embodiment, a drift image comprising an image of a drift reference slide is captured by a system to be standardized. A drift measurement is calculated using the drift image. A first normalization image comprising an image of a normalization slide is also captured by the system to be standardized. A reference normalization image, also comprising an image of the normalization slide, is captured by a reference system. The first normalization image is compared to the reference normalization image to determine a gamma value and offset value for the system to be standardized.
Abstract:
Systems and methods for standardizing one or more fluorescence scanning instruments to a reference system by separating the effects of drift and normalization. In an embodiment, a drift image comprising an image of a drift reference slide is captured by a system to be standardized. A drift measurement is calculated using the drift image. A first normalization image comprising an image of a normalization slide is also captured by the system to be standardized. A reference normalization image, also comprising an image of the normalization slide, is captured by a reference system. The first normalization image is compared to the reference normalization image to determine a gamma value and offset value for the system to be standardized.
Abstract:
An apparatus for measuring fluorescence of potable liquids contained within an optical quartz cell includes a deep UV laser or a compact UV LED that generates a light beam. A UV blocking and visible light transmitting optical filter reduces out-of-band emission from the LED. The optical quartz cell is between a pair of plane mirrors so that light from the light source travels through it several times. A concave mirror collects a fluorescence signal and has a common optical axis with a lens. The common optical axis is normal to an optical axis of the light beam. The concave mirror and lenses are positioned on opposite sides of the optical quartz cell. A fluorescence detector is in optical alignment with the concave mirror and the lens. A boxcar averager is in electrical communication with the fluorescence detector. Optical wavelength selection of the fluorescence emission uses optical filters or a spectrometer.
Abstract:
Eine Spektrometeranordnung (10) enthaltend ein Echelle-Gitter (18; 46) zur Dispersion der in die Spektrometeranordnung (10) eintretenden Strahlung in einer Hauptdispersionsrichtung, und eine Dispersionsanordnung (16; 40) zur Dispersion eines aus der in die Spektrometeranordnung eintretenden Strahlung erzeugten parallelen Strahlenbündels in einer Querdispersionsrichtung, ist dadurch gekennzeichnet, dass die Dispersionsanordnung (16; 40) reflektierend und in Bezug auf das Echelle-Gitter (18; 46) derart angeordnet ist, dass das parallele Strahlenbündel in Richtung auf das Echelle-Gitter reflektiert wird. Das Echelle-Gitter (18; 46) kann vorzugsweise derart angeordnet sein, dass die dispergierte Strahlung zurück in Richtung auf die Dispersionsanordnung (16; 40) reflektiert wird. )
Abstract:
A filter wheel and a spectrometer including the filter wheel are disclosed. The filter wheel has a first support structure on which a first plurality of filters are mounted and a second support structure on which at least one filter is provided. A radiation source generates a radiation beam, and a beam splitter splits the radiation beam into a first detection path and a second detection path. The first plurality of filters are selectively movable into the first detection path. The at least one filter on the second support structure is arranged to be disposed in the second detection path. The spectrometer includes a first radiation detector that detects radiation that passes through the selected filter in the first detection path, and a second radiation detector that detects radiation passing through the filter in the second detection path.
Abstract:
The present subject matter relates to methods of high-speed analysis of product samples. Light is directed to a portion of a product under analysis and reflected from or transmitted through the product toward an optical detector. Signals for the detector are compared with reference signals based on a portion of the illuminating light passing through a reference element to determine characteristics of the product under analysis. The products under analysis may be stationary, moved by an inspection point by conveyor or other means, or may be contained within a container, the container including a window portion through which the product illuminating light may pass.
Abstract:
An optical delay line device includes a rotatable wheel and one or more prisms mounted about the circumference of the wheel. The one are more prisms are positioned to retroreflect the optical beam that passes approximately tangent to the wheel to cause a delay or phase shift to the beam as the wheel rotates.
Abstract:
A color measurement instrument includes a housing and illuminators, a two-dimensional photodetector array, and an optics system within the housing. A UV filter wheel closes the housing to prevent contaminants from entering the housing. The filter wheel supports UV filters and non-UV glass that can be selectively aligned with the illuminators. The photodetectors can be read in parallel, and each photodetector includes a unique spectral filter. The optics system delivers light from the sample target area equally to each of the photodetectors.