摘要:
Die Erfindung betrift ein Verfahren zur Bestimmung der Schichtdicken eines Schichten aufweisenden Prüfkörpers (4), mit einer äußeren Deckschicht (1) und einer im Prüfkörper angeordneten Basisschicht (2), wobei die Deckschicht und die Basisschicht unterschiedliche magnetische Eigenschaften und Stoffzusammensetzung aufweisen mit den Verfahrensschritten: - Erzeugen eines magnetischen Wechselfeldes; - Messen der magnetischen Feldstärke; - Messen des Oberwellengehalts des Zeitsignals der tangentialen Magnetfeldstärke in Abhängigkeit von der magnetischen Feldstärke; - Messen der Überlagerungspermeabilität in Abhängigkeit von der magnetischen Feldstärke und - Bestimmen der Schichtdicke zumindest einer der Schichten durch ein statistisches Analyseverfahren, auf Basis der gemessenen Werte des Oberwellengehalts des Zeitsignals der tangentialen Magnetfeldstärke und der Überlagerungspermeabilität. Des Weiteren betrifft die Erfindung eine Vorrichtung geeignet zur Durchführung des Verfahrens und die Verwendung der Vorrichtung zur Bestimmung der Schichtdicken eines Prüfkörpers (4), wobei zumindest eine der Schichten (1), (2), (3) des Prüfkörpers (4), insbesondere die Deckschicht (1) paramagnetisch oder diamagnetisch ist.
摘要:
The invention relates to a method for generating a laser pulse train, having the following method steps: - generating the laser pulse train (4a) at a pulse repetition frequency; coupling the laser pulse train (4a) into an acousto-optic modulator; and selecting individual laser pulses of the laser pulse train (4a) by actuating the acousto-optic modulator using high-frequency pulses (4h), wherein the high-frequency pulses (4h) are generated by modulating a high-frequency carrier signal (4f) with a periodic switching signal (4e). The invention additionally relates to a system for generating a laser pulse train, comprising a pulse laser (1) which generates the laser pulse train at a pulse repetition frequency, comprising an acousto-optic modulator (2) in which the laser pulses propagate, and comprising a controller (7) which actuates the acousto-optic modulator (2) using high-frequency pulses in order to select individual laser pulses. The aim of the invention is to provide an improved method for selecting individual laser pulses from a laser pulse train. The intensity noise known from the prior art is to be reduced. This is achieved in that for the frequency f HF of the carrier signal (4f) of the high high-frequency pulses (4h), the following applies: f HF = n/p ⋅ f PRF , where n is any natural number and p specifies the whole-number ratio between the pulse repetition frequency and the frequency of the switching signal (4e), and the carrier signal (4f) is coupled to the laser pulse train (4a) in a phase-stable manner.
摘要:
The invention relates to a method for producing micromechanical components (1), wherein a liquid starting material (2) which can be cured by means of irradiation is applied onto a substrate, and a partial volume (21) of the starting material is cured by means of a local irradiation process using a first radiation source in order to produce at least one three-dimensional structure. The three-dimensional structure delimits at least one closed cavity (10), in which at least one part of the liquid starting material (2) is enclosed. The invention further relates to a micromechanical component that contains a liquid starting material (2), which is partly cured by means of irradiation, and at least one cavity (10), in which the liquid starting material (2) is enclosed.
摘要:
The invention relates to a concept for reconstructing a motion of an object (302) from a sequence of motion pattern segments of a computer model of the object, wherein each motion pattern segment corresponds to a different time interval of the motion, and wherein the object (302) has at least one sampling point coupled to a position marker (304). A motion transition between a starting motion state and an end motion state of the object (302) in a time interval of the motion is recorded on the basis of position data of the at least one sampling point that are received from the position marker (304). Furthermore, at least one motion pattern segment corresponding to the motion transition is selected from a plurality of motion patterns of the computer model that are stored in a database (205), in such a way that the selected motion pattern segment leads from the starting motion state to the end motion state for the time interval with sufficient probability. In addition, a depiction of the motion of the object for the time interval is reconstructed by using the starting motion state and the selected motion pattern segment.