Experts in the field of optical technology meet biennially at the "Laser – World of Photonics" in Munich. The Bonn research center caesar is exhibiting again at this year’s fair which will take place from 13 to 16 June. The research group "Holography and Laser Technology" headed by Prof. Peter Hering is presenting its state-of-the-art developments in Hall B2, Stand 252: an ultrafast holographic system featuring a mobile camera used for three-dimensional facial topometry for surgical planning and documentation as well as a particularly gentle laser technology for processing non-metallic substances.
In holographic three-dimensional facial topometry, a patient portrait hologram is generated using a short-pulsed laser and subsequently digitized. Thus a three-dimensional computer model is provided which can be visualized on every computer. A so-called texture with high resolution is retrieved from topometric information visualizing even skin pores and small hairs. The monochrome texture imposed on the model produces an extremely lifelike image. With the aid of computer tomography data models are retrieved demonstrating facial bone structure as well as the soft tissue on top. These images provide new options in oral or maxillo-facial surgical planning and documentation to achieve optimal functional as well as aesthetic results.
At the "Laser 2005" a mobile holographic camera system will be presented to the public for the first time. The mobile camera is assembled within 20 minutes and easy to operate. The camera enables flexible use at various locations and has been subject to clinical testing. At the "Laser" premiere on Monday morning (June 13th) a special "patient" will undergo holography: a thoroughbred award-winning poodle. On the one hand the extremely high resolution of the system is demonstrated as individual hairs of the poodle are visualized on the hologram and on the other hand the extremely short recording time, which leads to models free of motion-artifacts despite movements of the poodle.
Francis Hugenroth | alfa
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Plants and algae use the enzyme Rubisco to fix carbon dioxide, removing it from the atmosphere and converting it into biomass. Algae have figured out a way to increase the efficiency of carbon fixation. They gather most of their Rubisco into a ball-shaped microcompartment called the pyrenoid, which they flood with a high local concentration of carbon dioxide. A team of scientists at Princeton University, the Carnegie Institution for Science, Stanford University and the Max Plank Institute of Biochemistry have unravelled the mysteries of how the pyrenoid is assembled. These insights can help to engineer crops that remove more carbon dioxide from the atmosphere while producing more food.
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Our brains house extremely complex neuronal circuits, whose detailed structures are still largely unknown. This is especially true for the so-called cerebral cortex of mammals, where among other things vision, thoughts or spatial orientation are being computed. Here the rules by which nerve cells are connected to each other are only partly understood. A team of scientists around Moritz Helmstaedter at the Frankfiurt Max Planck Institute for Brain Research and Helene Schmidt (Humboldt University in Berlin) have now discovered a surprisingly precise nerve cell connectivity pattern in the part of the cerebral cortex that is responsible for orienting the individual animal or human in space.
The researchers report online in Nature (Schmidt et al., 2017. Axonal synapse sorting in medial entorhinal cortex, DOI: 10.1038/nature24005) that synapses in...
Whispering gallery mode (WGM) resonators are used to make tiny micro-lasers, sensors, switches, routers and other devices. These tiny structures rely on a...
Using ultrafast flashes of laser and x-ray radiation, scientists at the Max Planck Institute of Quantum Optics (Garching, Germany) took snapshots of the briefest electron motion inside a solid material to date. The electron motion lasted only 750 billionths of the billionth of a second before it fainted, setting a new record of human capability to capture ultrafast processes inside solids!
When x-rays shine onto solid materials or large molecules, an electron is pushed away from its original place near the nucleus of the atom, leaving a hole...
For the first time, physicists have successfully imaged spiral magnetic ordering in a multiferroic material. These materials are considered highly promising candidates for future data storage media. The researchers were able to prove their findings using unique quantum sensors that were developed at Basel University and that can analyze electromagnetic fields on the nanometer scale. The results – obtained by scientists from the University of Basel’s Department of Physics, the Swiss Nanoscience Institute, the University of Montpellier and several laboratories from University Paris-Saclay – were recently published in the journal Nature.
Multiferroics are materials that simultaneously react to electric and magnetic fields. These two properties are rarely found together, and their combined...
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