Abstract:
An electron microscope (10) is adapted to enable spectroscopic analysis of a sample (16). A parabolic mirror (18) has a central aperture (20) through which the electron beam can pass. The mirror (18) focuses laser illumination from a transverse optical path (24) onto the sample, and collects Raman and/or other scattered light, passing it back to an optical system (30). The mirror (18) is retractable (within the vacuum of the electron microscope) by a sliding arm assembly (22).
Abstract:
A reflector for improving the signal of spectrometer, is a truncated cone having a reflective inner surface and a conical axis, the truncated cone open at a larger axial end thereof, open at a smaller axial end thereof, and having an opening in the cone surface. The reflector retums scattered light back to the surface of a sample, and therefore enhances the amount of collect light.
Abstract:
Spektroskopisches System für die Analyse von kleinen und kleinsten Substanzmengen verwenden zur Energieübertragung kegelförmige Aperturwandler (14, 15), die im Objektraum (8) zwischen der Lichtquelle (L) und der Probe (9), und bei Absorptionsmessungen auch zwischen der Probe (9) und dem Eintrittsspalt (3) eines Spektrometers (1) angeordnet sind. Bei einer Ausbildung als Doppelkegel erlauben die Aperturwandler (14, 15) eine Schrägankopplung in ein die Probe (9) aufnehmendes Kapillarrohr, das als Stufen-Wellenleiter für die eingekoppelte Strahlung wirkt.
Abstract:
An optical proximity sensor (1) generates information indicative of a distance (D1) to an object (14A) in a field and in some embodiments also generates information indicative of a spectral reflectance characteristics of the object (14A). The information indicative of the spectral reflectance characteristic can be used to determine whether the object (14A) in the field is a living plant (14A) or another object such as soil (10). Light emitted from the optical sensor (1) for reflection off the object (14A) is modulated so that reflected light from the optical sensor can be discriminated from reflected ambient sunlight. The optical sensor (1) is scanned over the field to map objects in the field and/or to determine the location of rows of crop plants. A sensor in accordance with the present invention has many uses in agriculture including spraying, cultivation and vehicle guidance.
Abstract:
Le dispositif optique d'imagerie comporte pour l'analyse spectrale d'une scène, d'une part, un masque (8) disposé dans le plan image intermédiaire (PI) comportant un nombre déterminé de fentes isolant chacune une partie déterminée de l'image de la scène observée, la grande dimension des fentes étant parallèle aux lignes de détecteurs élémentaires constituant le détecteur (11) et perpendiculaire à l'axe de rotation (6) du miroir (5), et comporte, d'autre part, une optique dispersive (9), disposée au voisinage de l'optique de reprise (10₁, 10₂) et séparant un nombre déterminé de longueurs d'onde issues du masque (8), l'optique dispersive (9) étant déterminée pour disperser chaque longueur d'onde dans une direction respective déterminée pour couvrir toute la surface sensible du détecteur (11) lors du balayage de la scène. Les applications vont notamment à l'analyse spectrale de la signature thermique d'une cible et à la détection de gaz.
Abstract:
A new immunoassay system is provided for the detection of ligands or ligand binding partners in solution in a heterogeneous format. The invention relies upon the detection of back scattered light from an evanescent wave disturbed by the presence of a colloidal gold label brought to the interface by an immunological reaction. The evanescent wave existing at the interface in turn is the result of a totally internally reflected incident light wave. Placement of the detector at a back angle above the critical angle insures a superior signal-to-noise ratio. Apparatus and methods for scanning, detecting and manipulating light including a scattered total internal reflectance immunoassay system are provided.
Abstract:
Für die Abbildung von kleinen Bereichen mit großem Offnungswinkel werden Objektive angegeben, die aus zwei Kegelschnittkörpern (z.B. 1a, 1b, 6a, 6b) aus optisch isotropen Material bestehen und bei denen die Ablenkung der Lichtstrahlen durch Totalreflektion an den Mantelflächen (z.B. 10, 15, 60, 65) erfolgt. Die Lichtein- und austrittsflächen sind als Kugelflächen (z.B. 13, 18, 63, 68) ausgebildet, deren Mittelpunkte (z.B. 14, 19, 64, 69) mit den Brennpunkten (z.B. 11, 16, 61, 66) der Kegelschnittkörper mindestens annähernd in einem Punkt vereinigt sind.
Abstract:
According to an aspect of the present inventive concept there is provided a device for polarization dependent imaging, comprising: a detector comprising light sensitive elements; a plurality of light propagating units, each comprising a polarization splitter having a receiving end for receiving incident light, and comprising a first and a second waveguide. The first and second waveguides comprise a first and second portion of the receiving end. The first and second waveguides comprise a first and second distributing end, separate from each other. The polarization splitter is configured to propagate received light to the distributing ends. Each of the portions has an elongated shape such that propagation of light in the waveguides is dependent on the light's linear polarization. The elongated shapes are angled with respect to each other, such that the waveguides are configured to propagate different linear polarization directions. Each light propagating unit is arranged such that light at the first and second distributing ends is output towards a first and second light sensitive element, respectively.
Abstract:
According to an aspect of the present inventive concept there is provided a device for polarization dependent imaging, comprising: a detector comprising light sensitive elements; a plurality of light propagating units, each comprising a polarization splitter having a receiving end for receiving incident light, and comprising a first and a second waveguide. The first and second waveguides comprise a first and second portion of the receiving end. The first and second waveguides comprise a first and second distributing end, separate from each other. The polarization splitter is configured to propagate received light to the distributing ends. Each of the portions has an elongated shape such that propagation of light in the waveguides is dependent on the light's linear polarization. The elongated shapes are angled with respect to each other, such that the waveguides are configured to propagate different linear polarization directions. Each light propagating unit is arranged such that light at the first and second distributing ends is output towards a first and second light sensitive element, respectively.