Abstract:
A laser (10) may comprise a ceramic body (12) including a first wall (32) and a second wall (32) opposite the first wall (32), a first mirror (16) positioned at first ends of the first and second walls (32), a second mirror (18) positioned at second ends of the first and second walls (32) opposite the first ends, the first and second walls (32) and the first and second mirrors (16, 18) defining a slab laser cavity (14) within the ceramic body (12). The laser (10) may further comprise a first electrode (24) positioned outside the laser cavity (14) and adjacent to the first wall (32) of the ceramic body (12) and a second electrode (26) positioned outside the laser cavity (14) and adjacent to the second wall (32) of the ceramic body (12), wherein a laser gas disposed in the laser cavity (14) is excited when an excitation signal is applied to the first and second electrodes (24, 26).
Abstract:
Die Erfindung betrifft ein Verfahren und einen Detektor (6) zur Ermittlung des Absorptionsspektrums eines Mediums (2), wobei das Medium (2) mit Licht einer Lichtquelle (1) durchstrahlt wird und die Intensität des transmittierten Lichts nach dem Durchgang durch das Medium (2) sowie ohne Durchgang durch das Medium (2) mit einem Detektor (6) mit mehreren in verschiedenen Spektralbereichen (Δλ i ) empfindlichen lichtempfindlichen Elementen (7) gemessen wird, und aus den Verhältnissen der in allen Spektralbereichen (Δλ i ) gemessenen Lichtintensitäten (I i ) die Absorptionswerte (α i ) in allen Spektralbereichen (Δλ i ) und daraus das Absorptionsspektrum ermittelt wird. Zur Erhöhung der effektiven Dynamik des Detektors (6) für verschiedene Spektralbereiche (Δλ i ) ist vorgesehen, dass die Größe der Fläche (S j ) der lichtempfindlichen Elemente (7) bestimmter Spektralbereiche (Δλ j ) an die typischen Intensitäten (I j ) des transmittierten Lichts und vorzugsweise auch auf den Wirkungsgrad (η) der lichtempfindlichen Elemente (7) in diesen Spektralbereichen (Δλ j ) angepasst wird.
Abstract:
A laser (10) may comprise a ceramic body (16) defining a chamber therein containing a laser gas. The ceramic body (16) may include a plurality of parallel walls (28, 30) that partially define a first section (12) of the chamber, the first section (12) of the chamber defining a waveguide. The ceramic body (16) may further include a plurality of oblique walls (32, 34) that partially define a second section (14) of the chamber, the second section (14) of the chamber being shaped to modify a transverse profile of a laser beam (38) traveling through the second section (14) of the chamber. The laser (10) may further comprise a plurality of electrodes (18, 20) positioned outside the ceramic body (16) and adjacent to the plurality of parallel walls (28, 30) such that only laser gas within the first section (12) of the chamber is excited when an excitation signal is applied to the plurality of electrodes (18, 20).
Abstract:
The invention relates to a probe that is based upon the spectrometric principle, is essentially prismatic or cylindrical and is used for detecting fluid contents. The inventive probe comprises an essentially cylindrical spectrometer (1), an optical waveguide (3) and an electronic circuit (10) by means of which the spectrometer (1) is connected to a plug (7). The invention is characterised in that the evaluation and supply electronics (10) are arranged on a board (11) which consists of at least two pieces, in that one piece (11') of the board extends essentially in parallel in relation to the probe axis (9') and the remaining piece (12) of the board is inclined by at least 45 DEG in relation thereto and in that the axis of the spectrometer (1) is arranged at least essentially in parallel in relation to the probe axis (9').
Abstract:
A laser may comprise a ceramic body including a first wall and a second wall opposite the first wall, a first mirror positioned at first ends of the first and second walls, a second mirror positioned at second ends of the first and second walls opposite the first ends, the first and second walls and the first and second mirrors defining a slab laser cavity within the ceramic body. The laser may further comprise a first electrode positioned outside the laser cavity and adjacent to the first wall of the ceramic body and a second electrode positioned outside the laser cavity and adjacent to the second wall of the ceramic body, wherein a laser gas disposed in the laser cavity is excited when an excitation signal is applied to the first and second electrodes.
Abstract:
A laser (10) may comprise a ceramic body (16) defining a chamber therein containing a laser gas. The ceramic body (16) may include a plurality of parallel walls (28, 30) that partially define a first section (12) of the chamber, the first section (12) of the chamber defining a waveguide. The ceramic body (16) may further include a plurality of oblique walls (32, 34) that partially define a second section (14) of the chamber, the second section (14) of the chamber being shaped to modify a transverse profile of a laser beam (38) traveling through the second section (14) of the chamber. The laser (10) may further comprise a plurality of electrodes (18, 20) positioned outside the ceramic body (16) and adjacent to the plurality of parallel walls (28, 30) such that only laser gas within the first section (12) of the chamber is excited when an excitation signal is applied to the plurality of electrodes (18, 20).
Abstract:
The device according to the invention uses a focussed laser beam 2 for melting the workpiece to be machined and a jet pump which is integrated in the machining head and with which a vacuum is produced by compressed air in a suction orifice 1 arranged coaxially to the laser beam 2. The liquid melt is sucked by this vacuum into the suction orifice 1, where it is caught by the pumping flow and is expelled from the machining head.