Today, a choice has to be made whether to stay by the lake or watch the match on a big public screen or the TV set at home. In future, barbecue enthusiasts and football fans will be able to enjoy both at the same time. Cellphone TV is coming closer and with an innovative mini beamer it will be possible to create a public viewing event on a small scale – for example on a white bathing towel by the side of a lake.
The mini projector was developed by research scientists at the Fraunhofer Institute for Applied Optics and Precision Engineering IOF in Jena in cooperation with their partners in the EU project HYPOLED. Unlike conventional beamers it does not need an additional illumination system. Because the beamer can operate without an extra light source it offers a number of advantages: Firstly, it takes up little space. The prototype is 2.5 centimeters long, has a diameter of 1.8 centimeters and can be easily integrated in a cellphone or a PDA. Secondly, the device needs very little energy and therefore does not overtax the battery.
"The key component of the projector is an organic display, or OLED, developed by our colleagues at the Fraunhofer Institute for Photonic Microsystems IPMS in Dresden," says Dr. Stefan Riehemann, group manager at the IOF. Currently the OLED display produces a monochrome image with a brightness of 10,000 candelas per square meter; for color images the brightness is about half that level. By way of comparison, a computer monitor generates about 150-300 candelas per square meter.
A lens system projects the image produced by the OLED onto a wall or other flat surface. The lenses are made of glass but the research scientists are already developing an optical system which uses plastic lenses. As plastic lenses can be embossed, they can be produced in larger quantities more simply and cheaply than glass lenses. At the Laser World of Photonics trade show from June 15 to 18 in Munich, the researchers are exhibiting a monochrome prototype (Hall B2, Stand B2.421).
Dr. Stefan Riehemann | EurekAlert!
What happens when we heat the atomic lattice of a magnet all of a sudden?
18.07.2018 | Forschungsverbund Berlin
Subaru Telescope helps pinpoint origin of ultra-high energy neutrino
16.07.2018 | National Institutes of Natural Sciences
For the first time ever, scientists have determined the cosmic origin of highest-energy neutrinos. A research group led by IceCube scientist Elisa Resconi, spokesperson of the Collaborative Research Center SFB1258 at the Technical University of Munich (TUM), provides an important piece of evidence that the particles detected by the IceCube neutrino telescope at the South Pole originate from a galaxy four billion light-years away from Earth.
To rule out other origins with certainty, the team led by neutrino physicist Elisa Resconi from the Technical University of Munich and multi-wavelength...
For the first time a team of researchers have discovered two different phases of magnetic skyrmions in a single material. Physicists of the Technical Universities of Munich and Dresden and the University of Cologne can now better study and understand the properties of these magnetic structures, which are important for both basic research and applications.
Whirlpools are an everyday experience in a bath tub: When the water is drained a circular vortex is formed. Typically, such whirls are rather stable. Similar...
Physicists working with Roland Wester at the University of Innsbruck have investigated if and how chemical reactions can be influenced by targeted vibrational excitation of the reactants. They were able to demonstrate that excitation with a laser beam does not affect the efficiency of a chemical exchange reaction and that the excited molecular group acts only as a spectator in the reaction.
A frequently used reaction in organic chemistry is nucleophilic substitution. It plays, for example, an important role in in the synthesis of new chemical...
Optical spectroscopy allows investigating the energy structure and dynamic properties of complex quantum systems. Researchers from the University of Würzburg present two new approaches of coherent two-dimensional spectroscopy.
"Put an excitation into the system and observe how it evolves." According to physicist Professor Tobias Brixner, this is the credo of optical spectroscopy....
Ultra-short, high-intensity X-ray flashes open the door to the foundations of chemical reactions. Free-electron lasers generate these kinds of pulses, but there is a catch: the pulses vary in duration and energy. An international research team has now presented a solution: Using a ring of 16 detectors and a circularly polarized laser beam, they can determine both factors with attosecond accuracy.
Free-electron lasers (FELs) generate extremely short and intense X-ray flashes. Researchers can use these flashes to resolve structures with diameters on the...
13.07.2018 | Event News
12.07.2018 | Event News
03.07.2018 | Event News
19.07.2018 | Materials Sciences
19.07.2018 | Earth Sciences
19.07.2018 | Life Sciences