Verfahren zum optischen Abtasten und Vermessen einer Umgebung mit einer 3D-Messvorrichtung und Au... more Verfahren zum optischen Abtasten und Vermessen einer Umgebung mit einer 3D-Messvorrichtung und Autokalibrierung mittels 2D-Kamera Eine Kalibrierplatte (400) zum Kalibrieren einer Strahlen (232, 233) aussendenden und wenigstens eine Kamera (111, 112, 113) aufweisenden 3D-Messvorrichtung (100), mit mehreren Marken (402, 403, 404), welche von der Kamera (111, 112, 113) aufnehmbar und in den Aufnahmen identifizierbar sind, weist einen Spiegel (408) auf, welcher einfallende Strahlen (232, 233) der 3D-Messvorrichtung (100) reflektiert.
A three-dimensional measuring system includes a body, an internal projector that is attached to t... more A three-dimensional measuring system includes a body, an internal projector that is attached to the body, and a dichroic camera structure, wherein the dichroic camera assembly comprises a first beam splitter which directs a first portion of incident light in a first channel, the light-sensitive to a first matrix leads, and directs a second portion of the incident light in a second channel, which leads to a second photosensitive matrix.
Bei einem Verfahren zur Steuerung einer 3D-Messvorrichtung (100), die ihre Umgebung zum Vermessen... more Bei einem Verfahren zur Steuerung einer 3D-Messvorrichtung (100), die ihre Umgebung zum Vermessen aufnimmt und zu unterschiedlichen Zeiten aufgenommene Messdaten an eine Steuer- und Auswertevorrichtung (122) liefert, welche die von der 3D-Messvorrichtung (100) gelieferten Messdaten auswertet, die ausgewerteten Messdaten registriert als eine dreidimensionale Punktwolke (3DP) und diese dreidimensionale Punktwolke (3DP) visualisiert, werden die Bewegungen (v 1 , v 2 , v 3 ) aus den zeitabhangigen Positionen der 3D-Messvorrichtung (100) relativ zur dreidimensionalen Punktwolke (3DP) ermittelt und ausgewertet, und es erfolgt mittels der ausgewerteten Bewegungen (v 1 , v 2 , v 3 ) eine Steuerung des Messens und/oder des Visualisierens und/oder des Nachbearbeitens der Messdaten und/oder der dreidimensionalen Punktwolke (3DP), wobei zur Auswertung der Bewegungen (v 1 , v 2 , v 3 ) der 3D-Messvorrichtung (100) der Betrag und die Richtung der Geschwindigkeit und/oder Beschleunigung der moment...
In a method for optical scanning and measuring an environment by means of a 3D-measuring device (... more In a method for optical scanning and measuring an environment by means of a 3D-measuring device (100), in which a projector (121) of the 3D-measuring device (100) at least one pattern (X) on an object (O) in the vicinity of the 3D generated gage (100) at least a first camera (111) of the 3D-measuring device (100) images of the pattern (X) the object is provided (O) does, and the 3D coordinates of selected points (X From the recordings made are determined on fulfillment of predetermined conditions, the 3D coordinates and new calibration parameters, the new calibration parameters are compared with those used calibration parameters and replace them if necessary.
L'invention concerne un scanner tridimensionnel (3D) comportant deux cameras et un projecteur... more L'invention concerne un scanner tridimensionnel (3D) comportant deux cameras et un projecteur et qui est couple amovible a un dispositif choisi dans le groupe constitue : d'une machine de mesure de coordonnees a bras articule, d'un ensemble camera, d'un ensemble cible de poursuite a six degres de liberte (six DOF), et d'un ensemble cible de poursuite a spot lumineux a six DOF.
In a device for optically scanning and measuring an environment, the device is configured as a la... more In a device for optically scanning and measuring an environment, the device is configured as a laser scanner (10), which has a foot (14) resting in a stationary framework of the laser scanner (10), a measuring head (12) rotatable around a vertical axis (Z) with respect to the foot (14), and a motor (50) supported in the measuring head (12). The motor has a motor shaft (50a) and a gear which, when driven by the motor (50) by the motor shaft (50a), turns the measuring head (12) relative to the base (14). The device is characterized in that the gear is configured as a planetary gear (54).
We experimentally and theoretically investigate the dephasing rates of the coherent evolution of ... more We experimentally and theoretically investigate the dephasing rates of the coherent evolution of a resonantly driven pseudo spin emersed in a reservoir of pseudo spins. The pseudo spin is realized by optically exciting 87 Rb atoms into a Rydberg state. Hence, the upper spin states are coupled via the strong van der Waals interaction. Two different experimental techniques to measure the dephasing rates are shown: the 'rotary echo' technique, known from nuclear magnetic resonance physics, and electromagnetically induced transparency. The experiments are performed in a dense frozen Rydberg gas, either confined in a magnetic trap or in an optical dipole trap. Additionally, a numerical simulation is used to analyse the dephasing in the rotary echo experiments.
2007 European Conference on Lasers and Electro-Optics and the International Quantum Electronics Conference, 2007
ABSTRACT The authors performed experiments on the coherent dynamics of Rydberg excitation in ther... more ABSTRACT The authors performed experiments on the coherent dynamics of Rydberg excitation in thermal clouds of 87Rb for a wide range of atomic densities, single-atom Rabi-frequencies and excitation times in a specialized vacuum chamber. We further observed a clear signature of the phase transition to a Bose-Einstein condensate in the fraction of excited Rydberg atoms when cooling the thermal cloud below Tc. In our experiments the sample size is bigger than the so called blockade radius, which is defined as the interatomic distance where the interaction energy becomes equal to the power broadened linewidth of the excitation.
Verfahren zum optischen Abtasten und Vermessen einer Umgebung mit einer 3D-Messvorrichtung und Au... more Verfahren zum optischen Abtasten und Vermessen einer Umgebung mit einer 3D-Messvorrichtung und Autokalibrierung mittels 2D-Kamera Eine Kalibrierplatte (400) zum Kalibrieren einer Strahlen (232, 233) aussendenden und wenigstens eine Kamera (111, 112, 113) aufweisenden 3D-Messvorrichtung (100), mit mehreren Marken (402, 403, 404), welche von der Kamera (111, 112, 113) aufnehmbar und in den Aufnahmen identifizierbar sind, weist einen Spiegel (408) auf, welcher einfallende Strahlen (232, 233) der 3D-Messvorrichtung (100) reflektiert.
A three-dimensional measuring system includes a body, an internal projector that is attached to t... more A three-dimensional measuring system includes a body, an internal projector that is attached to the body, and a dichroic camera structure, wherein the dichroic camera assembly comprises a first beam splitter which directs a first portion of incident light in a first channel, the light-sensitive to a first matrix leads, and directs a second portion of the incident light in a second channel, which leads to a second photosensitive matrix.
Bei einem Verfahren zur Steuerung einer 3D-Messvorrichtung (100), die ihre Umgebung zum Vermessen... more Bei einem Verfahren zur Steuerung einer 3D-Messvorrichtung (100), die ihre Umgebung zum Vermessen aufnimmt und zu unterschiedlichen Zeiten aufgenommene Messdaten an eine Steuer- und Auswertevorrichtung (122) liefert, welche die von der 3D-Messvorrichtung (100) gelieferten Messdaten auswertet, die ausgewerteten Messdaten registriert als eine dreidimensionale Punktwolke (3DP) und diese dreidimensionale Punktwolke (3DP) visualisiert, werden die Bewegungen (v 1 , v 2 , v 3 ) aus den zeitabhangigen Positionen der 3D-Messvorrichtung (100) relativ zur dreidimensionalen Punktwolke (3DP) ermittelt und ausgewertet, und es erfolgt mittels der ausgewerteten Bewegungen (v 1 , v 2 , v 3 ) eine Steuerung des Messens und/oder des Visualisierens und/oder des Nachbearbeitens der Messdaten und/oder der dreidimensionalen Punktwolke (3DP), wobei zur Auswertung der Bewegungen (v 1 , v 2 , v 3 ) der 3D-Messvorrichtung (100) der Betrag und die Richtung der Geschwindigkeit und/oder Beschleunigung der moment...
In a method for optical scanning and measuring an environment by means of a 3D-measuring device (... more In a method for optical scanning and measuring an environment by means of a 3D-measuring device (100), in which a projector (121) of the 3D-measuring device (100) at least one pattern (X) on an object (O) in the vicinity of the 3D generated gage (100) at least a first camera (111) of the 3D-measuring device (100) images of the pattern (X) the object is provided (O) does, and the 3D coordinates of selected points (X From the recordings made are determined on fulfillment of predetermined conditions, the 3D coordinates and new calibration parameters, the new calibration parameters are compared with those used calibration parameters and replace them if necessary.
L'invention concerne un scanner tridimensionnel (3D) comportant deux cameras et un projecteur... more L'invention concerne un scanner tridimensionnel (3D) comportant deux cameras et un projecteur et qui est couple amovible a un dispositif choisi dans le groupe constitue : d'une machine de mesure de coordonnees a bras articule, d'un ensemble camera, d'un ensemble cible de poursuite a six degres de liberte (six DOF), et d'un ensemble cible de poursuite a spot lumineux a six DOF.
In a device for optically scanning and measuring an environment, the device is configured as a la... more In a device for optically scanning and measuring an environment, the device is configured as a laser scanner (10), which has a foot (14) resting in a stationary framework of the laser scanner (10), a measuring head (12) rotatable around a vertical axis (Z) with respect to the foot (14), and a motor (50) supported in the measuring head (12). The motor has a motor shaft (50a) and a gear which, when driven by the motor (50) by the motor shaft (50a), turns the measuring head (12) relative to the base (14). The device is characterized in that the gear is configured as a planetary gear (54).
We experimentally and theoretically investigate the dephasing rates of the coherent evolution of ... more We experimentally and theoretically investigate the dephasing rates of the coherent evolution of a resonantly driven pseudo spin emersed in a reservoir of pseudo spins. The pseudo spin is realized by optically exciting 87 Rb atoms into a Rydberg state. Hence, the upper spin states are coupled via the strong van der Waals interaction. Two different experimental techniques to measure the dephasing rates are shown: the 'rotary echo' technique, known from nuclear magnetic resonance physics, and electromagnetically induced transparency. The experiments are performed in a dense frozen Rydberg gas, either confined in a magnetic trap or in an optical dipole trap. Additionally, a numerical simulation is used to analyse the dephasing in the rotary echo experiments.
2007 European Conference on Lasers and Electro-Optics and the International Quantum Electronics Conference, 2007
ABSTRACT The authors performed experiments on the coherent dynamics of Rydberg excitation in ther... more ABSTRACT The authors performed experiments on the coherent dynamics of Rydberg excitation in thermal clouds of 87Rb for a wide range of atomic densities, single-atom Rabi-frequencies and excitation times in a specialized vacuum chamber. We further observed a clear signature of the phase transition to a Bose-Einstein condensate in the fraction of excited Rydberg atoms when cooling the thermal cloud below Tc. In our experiments the sample size is bigger than the so called blockade radius, which is defined as the interatomic distance where the interaction energy becomes equal to the power broadened linewidth of the excitation.
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Papers by Rolf Heidemann