Abstract:
The invention relates to a measuring device for determining a vegetation index value (REIP) of plants. The measuring device comprises a plurality of light emitting elements, of which each emits substantially monochrome light at a predetermined wavelength, a light receiving element, which receives light from the light emitting elements reflected by the plants and generates a signal indicating each intensity of the received light, and a control device consecutively actuating the light emitting elements in a cyclical sequence, determining each intensity of the reflected light from the output signal of the light receiving element, and calculating the vegetation index value from the determined intensities of the overall measurement cycle. According to the invention, a light frequency converter is provided as the light receiving element.
Abstract:
An optical detection system per motor-vehicles, suitable to detect the condition of the road surface on which the vehicle is travelling, comprising a photodetector unit composed of a camera having a matrix of pixels composed of photodetectors based on a photosensitive material suitable to detect both radiations in the visible and near infrared (NIR), i.e. having a wavelength comprised between 380 and 900 nanometres, and radiations in the short wavelength infrared (SWIR), i.e. having a wavelength comprised between 900 and 1700 nanometres.
Abstract:
Bei einer Messeinrichtung zur Messung von Feinstaub für ein Kraftfahrzeug mit mindestens einer Laserlichtquelle, mit mindestens einer optischen Empfangseinrichtung, mit mindestens einem Messraum und mit mindestens einem mindestens ein Bauteil der Messeinrichtung zumindest abschnittsweise umgebenden Gehäuse, ist erfindungswesentlich vorgesehen, dass mindestens ein Gehäuse aus mindestens zwei Gehäuseteilen ausgebildet ist, dass die Gehäuseteile als zueinander korrespondierende Gehäuseschalen ausgebildet sind, dass mindestens zwei zueinander korrespondierende Gehäuseschalen aneinander anliegend ein Grundgehäuse ausbilden und dass mindestens zwei zueinander korrespondierende Gehäuseschalen aneinander anliegend ein das Grundgehäuse umgebendes Außengehäuse ausbilden. Des Weiteren betrifft die Erfindung ein Kraftfahrzeug mit einer erfindungsgemäßen Messeinrichtung.
Abstract:
The device (102) for detecting trace gases comprises, in a closed casing (104): an analysis cell (112) equipped with means allowing air samples to enter and exit; a laser light source (106) that emits a laser beam intended for said analysis cell; a main photosensitive sensor (156) positioned to receive the laser beam output from said analysis cell and designed to emit a signal that is representative of the light intensity received by said sensor; and a temperature regulating means (144 to 150) designed to keep at a predefined constant temperature, jointly: the laser light source; the air entering into the analysis cell; an optical bench (118) supporting the cell and the laser light source and; the contents of the closed casing.
Abstract:
Sensor zur Messung der Konzentration eines Bestandteils eines Abgases (102), wobei der Sensor (1) eine Lichtquelle (11), eine Messzelle (12) und einen optischen Detektor (13) umfasst, wobei von der Lichtquelle (11) erzeugtes Licht (101) in die Messzelle (12) und von dort zu dem optischen Detektor (13) gelangt, dadurch gekennzeichnet, dass der Sensor (1) ferner mindestens ein Zutrittsmittel (70) umfasst, durch das ein Zutritt des Abgases (102) in die Messzelle (12) erfolgt und durch das ein Zutritt des Abgases (102) in die Messzelle (12) für zumindest Teile des Abgases (102) unterbindbar ist.
Abstract:
Eine Vorrichtung (10) zur Untersuchung eines heterogenen Materials (1) mittels laserinduzierter Plasmaspektroskopie wird bereitgestellt, wobei die Vorrichtung einen Laser (100) zum Erzeugen eines Plasmas aus dem heterogenen Material (1), einen Breitband- Detektor (200), der eingerichtet ist, ein kontinuierliches Spektrum einer Plasmaemissionsstrahlung zu erfassen, und einen Schmalband-Detektor (250), der eingerichtet ist, eine vorbestimmte Spektrallinie innerhalb derselben Plasmaemissionsstrahlung zu erfassen, beinhaltet.
Abstract:
The invention relates to a rain sensor, especially for a motor vehicle, said sensor comprising an optical waveguide (22) which can be arranged in a windscreen. According to the invention, the planar holographic coupling elements for coupling and decoupling radiation (4) are formed from layered photo-polymer parts (3) into which volume holograms are integrated. The photo-polymer parts (3) are arranged between the core (1) of the waveguide and the envelope of the waveguide (2), resulting in a simple production method and an increased flexibility in terms of the arrangement of the waveguide (22) in the windscreen.
Abstract:
A system for sampling and analyzing a material located at a hazardous site. A laser (12) located remote from the hazardous site is connected to an optical fiber (16) which directs laser radiation proximate the material at the hazardous site. The laser radiation ablates a sample of the material. An inductively coupled plasma (32) is located remotely from the material. An aerosol transport system carries the ablated particles to a plasma, where they are dissociated, atomized and excited to provide characteristic optical reduction of the elemental constituents of the sample. An optical spectrometer (40) is located remotely from the site. A second optical fiber (38) is connected to the optical spectrometer at one end and the plasma source at the other end to carry the optical radiation from the plasma source (32) to the spectrometer (40).