Abstract:
A novel structure for a small, inexpensive, and easily replaced infrared source having near blackbody emission over a spectrum of 2-20 micron wavelengths is disclosed. The source element is self-starting and has a life expectancy in excess of 1000 hours at 1700 degrees K, which requires only 22 watts of power to maintain. Because the source is energy efficient, there is no need of auxilliary cooling or added thermal isolation from adjacent components when the source is used in an instrument such as a spectrophotometer.
Abstract:
Une puce photonique pour l'éclairage d'une scène, la puce photonique comprend : - un substrat (10) comprenant une face avec une gravure (100), - des guides d'onde s'étendant parallèlement à un plan formé par la face gravée du substrat (10), configurés pour guider un faisceau lumineux, - des réseaux de diffraction (12), respectivement formés dans un des guides d'onde (11) et configurés pour extraire, hors du guide d'onde (11) dans lequel il est formé et vers la gravure (100) du substrat (10), le faisceau lumineux,
au moins deux guides d'onde étant configurés pour recevoir des faisceaux lumineux de longueurs d'onde différentes, et dans laquelle la gravure (100) du substrat (10) est configurée pour extraire les faisceaux lumineux hors du substrat (10), vers la scène à éclairer, ladite scène se trouvant contre la face gravée du substrat (10) et au niveau de la gravure (100) du substrat (10).
Abstract:
This invention relates to a source for emitting radiation in the infrared range comprising a thin membrane including a radiation element made from a semi-conductive material having a chosen dopant, the radiation element being connected to a frame, the frame comprising connector means for connecting to a power source for conducting an electrical current through the substrate, the radiation element being provided with a periodic modulation of the refractive index constituting a photonic crystal having a chosen period, thus defining an optical resonator at one or more chosen wavelengths, and wherein the membrane is mounted to the substrate through a number of conductor beams distributed along the membrane circumference so as to provide an even current distribution and thus even heating over the membrane.
Abstract:
A sample analysis system is provided with: a reference substance database including measurement results and component classification information of reference substances obtained by each analysis device on information of each reference substance; a reference substance designation unit; a measurement result collation unit to obtain the commonality of the components, the difference between the physical quantities of the respective components, and the degree of coincidence of the measurement results for each analysis device for the designated reference substance; an integration coincidence degree calculation unit to obtain an integration degree of coincidence; and a judgment unit to judge whether or not the difference between the contents of contained components is within an allowable range and classify the corresponding component based on the component classification information.
Abstract:
Es wird eine Gasanalysevorrichtung (10) nach dem Prinzip der nichtdispersiven Infrafrotspektroskopie (NDIR) zur Erfassung von Gaskomponenten in einem Messgas (22) angegeben, wobei die Gasanalysevorrichtung (10) einen Lichtsender (12), eine Küvette (20) zur Aufnahme des Messgases (22), einen im Wellenlängenbereich der Absorption der zu erfassenden Gaskomponenten selektiv sensitiven Detektor (28) und eine Auswertungseinheit (36, 35) für ein Detektorsignal des Detektors (28) aufweist, und wobei Lichtsender (12), Küvette (20) und Detektor (28) derart angeordnet sind, dass Licht des Lichtsenders (12) nach Transmission der Küvette (20) auf den Detektor (32) fällt. Dabei weist der Lichtsender (12) mehrere Lichtquellen (14a-c), insbesondere Laserlichtquellen, unterschiedlicher Wellenlängen auf, deren Licht auf einer gemeinsamen optischen Achse (18) in die Küvette (20) einkoppelbar ist.
Abstract:
A light source for near-infrared transmission and reflection spectroscopy can be constructed from a combination of a high power blue or blue-green light emitting diode (LED) and a phosphor element based on an inorganic material. The phosphor element absorbs the LED light and, in response to the LED excitation, emits luminescence that continuously covers the 700-1050 nm range. One possible material that can be used for such a near-infrared emitting phosphor element is a single crystal rod of Ti+3 doped Sapphire. An alternative near-infrared emitting phosphor material is a disk or rectangular shaped composite of Ti+3 doped Sapphire powder embedded in a clear optical epoxy or silicone encapsulant. Such a combination of a blue LED for excitation of a phosphor element that emits in a broad wavelength band has been widely used in white LEDs where the emission is in the 400-700 nm range.