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Outdoors dark glasses are a ‘must’ to protect the eyes, even when the sky is overcast. There is no etiquette that takes, the experts teach, because health wins the bon ton. Yet, slightly over 10% of Italians who misused his sunglasses, only 15% always puts on them, 30% do not wear them rarely and 18% do so rarely. And even if risk more damage of UV rays on view are the children and the elderly, only 10% of people over 55 buy sunglasses and as many as 9 out of 10 children between 4 and 10 years of wear. Data are collected by Defence Committee view (FOV) that every year, with the summer appointment, raises his message: “The sun glasses knows quality can save sight.” The eye, reminiscent of the specialists, is an organ very rich in oxygen and all the structures that are likely to experience oxidative stress. Affected by the light it produces many free radicals that, over time, accumulate, causing progressive damage. “The eyes of our sun protection becomes an increasingly pressing issue, not only in the spring and summer, but in all times of the year,” said Francis Loperfido, Cdv adviser and head of the General Service Unit of Ophthalmology ophthalmology San Raffaele hospital in Milan. “To condition the use of protective eyewear for the sun, there are environmental factors, the attractions, sports and special activities,” lists the expert.
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A new technique allows the production of multicolor holograms in which the colors remain the same even when changing direction of view, as in the original
A new technique that uses light instead of the normal laser holograms to produce three-dimensional color was developed by a group of Japanese researchers from the Universities of Tokyo and Osaka that describe an article published in Science. Miyu Ozaki and colleagues describe a particular method of producing multicolor holograms in which the colors remain the same even if we change the direction of observation, as in the original object.
According to the present approach, the laser light reflected from an object is intercepted by a photographic plate that records information about the phase and amplitude of light waves in the form of the interference pattern. When light passes through the holographic plate interferes with these schemes in order to reproduce the object, but usually in only one color. Rainbow holograms, like those used on credit cards appear in more colors under white light, but at the cost of some loss of information, so that the color of the hologram changes according to the angle of view.
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Researchers from the Polytechnic University of Madrid (UPM), in collaboration with the Universidad Complutense de Madrid (UCM) have developed an optical sensor based on biomimetic plastic that detects antibiotics without markers or biological receptors.
Unlike devices that are commonly used for biological and clinical analysis normally require a marker (either fluorescent or radioactive), researchers Universidad Politécnica de Madrid (UPM) in collaboration with Universidad Complutense de Madrid (UCM) have made an optical sensor using a polymer biomimetic detecting antibiotics directly, ie without scoring. The simplicity and low cost of manufacture, together with the great strength of the material used, represent significant practical advantages for a variety of applications, giving this type of sensors a huge commercial potential.
The sensor consists of a polymer film of about twenty microns (1 meter = 1,000,000 micrometers) thick in which there have been two printing processes.
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Two Japanese companies, and Kaneka Lumiotec, announced the placing on the market for OLED panels (Organic Light Emitting Diode) for lighting.
An OLED (Organic Light Emitting Diode) is manufactured by stacking a transparent substrate (glass or plastic) with a transparent anode, a series of semiconductor layers organic light emitter and a cathode. Apart from the substrate, the total thickness is a few hundred nanometers. Often the organic core is itself composed of several layers of electrodes in contact are those that promote the injection and transport the positive and negative charges to the issuing central layers.
OLEDs are currently used as a display screen in some mobile phones, radios or televisions to cameras and small size. OLEDs also arouse great interest in developing the lighting of the future. On a good light output (up to 100 lm / W in the laboratory) they have the advantage of being flexible, thin and light, and emit light uniformly over their entire surface. Moreover, they do not emit ultraviolet radiation. Their marketing should help design new types of energy efficient lighting.
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Nowadays, no door will not open stores without optical microsystems. All diodes (LEDs) [1] are optical microsystems. They are the key issues in growth sectors such as information, health and energy. The Federal Ministry of Education and Research (BMBF) supports research on microsystems and their applications in medicine and energy. It was decided to pay 5.8 million euros in the competence network (similar to clusters in France) Optima (Optische Mikrosysteme) [2] in the framework of “Pioneering and Innovation in the new Lander . The support program will run from January 1, 2011 to September 30, 2013.
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The Senate of Berlin for science and research used resources of the European Regional Development Fund (EFRE) to create a technology center for precision optical gratings with high efficiency. It will be housed within the Helmholtz Centre Berlin (HZB). The EFRE makes a total of 5 million euros available. The technology center will be established by the new Institute for Nanoscale and Optical Technology HZB. New gratings must be developed within this new structure.
The BESSY II synchrotron radiation HZB product subsequently used in many fields of research: basic research, life sciences, materials, catalysis, Archaeometry … Irradiation of samples using X-ray enables a new vision of matter. To fully study the samples, researchers need to analyze the properties of light irradiating. The radiation must be differentiated into different wavelengths: the role of diffraction gratings.
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The propagation of light is a question that has intrigued many scientists. German scientists from the Max Planck Institute for Quantum Optics (MPQ) [1] and the Swiss Ecole Polytechnique Federale de Lausanne (EPFL) [2] tried to solve this problem by trying to understand how to move from light on a chip using optical measurements.
Presented online in the journal Science [3], the results show that a form of induced transparency has enabled the coupling radiation / pressure of two modes: optical and mechanical. Their work, supported by a seed grant from the European Research Council (ERC) [4] and a Marie Curie Excellence Grant, could generate more applications in telecommunications and quantum information technologies.
The researchers explained that transparency optomechanical can be used for deceleration and storage on-chip light flow through microfabricated optomechanical assemblies. Led by EPFL professor, Tobias J. Kippenberg, the team discovered that the interaction of light (photons) and mechanical vibrations (phonons) can control the transmission of a light beam through a glass micro-resonator by a second laser beam, more powerful .
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The rain dance is one of utopian desire to represent human action in its meteorological environment. Control of it in fact opens the door to the massive socio-economic benefits. Several techniques have been developed in this direction. One of them, not without ecological impact is in the air dispersion of nanoparticles of silver salts to induce precipitation from clouds already formed.
In an article published in the journal Nature Photonics [1], Swiss physicists at the University of Geneva in collaboration with colleagues at the University of Lyon-I and the Free University of Berlin, has outlined a method condensation of atmospheric water induced by laser.
The laser used by researchers is a pulse laser ultra-short laser Teramobile. Built by Thales Laser, it can generate pulses of 100 femtoseconds (10E-13 s) with a power of 5 TW pulse energy of 350 mJ at a frequency of 10 Hz pulses These ultra- brief involve a local change of the refractive index of air (Kerr effect) and an ionization of the molecules.
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The professor of bio – photonics and laser technology from the University of Saarland [1 ] , Karsten Konig , has been awarded the Berthold Leibinger Innovation for his work on laser scanners . With this new technology , physicians will be able to detect cancers of the skin without having to remove tissue . They will also measure the effectiveness of anti -aging , the consequences of taking nicotine pills or hormone on the aging of the skin or the risk of sunscreens containing nanoparticles.
The new laser scanner now allows researchers to look inside the cell. In reaching a resolution a thousand times higher than with X- ray machines , it surpasses all its competitors. Physicians and pharmacists can thus analyze the different organelles that constitute the cells, such as mitochondria . Karsten König explains that “many creams alter the skin cells by slowing the aging mechanisms . With the laser scanner , you can check if their products are really effective. ” The unit will also be able to recognize cells of the skin cancer such as melanoma . The researchers are exploiting the difference in fluorescence between normal cells and cancer cells .
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And ‘ that emits a beam with a divergence much less than that of conventional THz laser
A New Terahertz semiconductor laser that emits a beam with a divergence much less than that of conventional THz laser has been obtained , using new metamaterial , a group of researchers at Harvard ‘s School of Engineering and directed by University of Leeds Federico Capasso.
The terahertz radiation can penetrate easily through paper , clothing , plastics and many other materials , making it an ideal tool for detecting hidden weapons or biological agents , to disclose, without side effects , the presence of cancer , for detecting defects in materials, astrophysics field , to detect low concentrations of chemicals widely used in space.
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Outdoors dark glasses are a ‘must’ to protect the eyes, even when the sky is overcast. There is no etiquette that takes, the experts teach, because health wins the bon ton. Yet, slightly over 10% of Italians who misused his sunglasses, only 15% always puts on them, 30% do not wear them rarely and 18% do so rarely. And even if risk more damage of UV rays on view are the children and the elderly, only 10% of people over 55 buy sunglasses and as many as 9 out of 10 children between 4 and 10 years of wear. Data are collected by Defence Committee view (FOV) that every year, with the summer appointment, raises his message: “The sun glasses knows quality can save sight.” The eye, reminiscent of the specialists, is an organ very rich in oxygen and all the structures that are likely to experience oxidative stress. Affected by the light it produces many free radicals that, over time, accumulate, causing progressive damage. “The eyes of our sun protection becomes an increasingly pressing issue, not only in the spring and summer, but in all times of the year,” said Francis Loperfido, Cdv adviser and head of the General Service Unit of Ophthalmology ophthalmology San Raffaele hospital in Milan. “To condition the use of protective eyewear for the sun, there are environmental factors, the attractions, sports and special activities,” lists the expert.
Presented online in the journal Science [3], the results show that a form of induced transparency has enabled the coupling radiation / pressure of two modes: optical and mechanical. Their work, supported by a seed grant from the European Research Council (ERC) [4] and a Marie Curie Excellence Grant, could generate more applications in telecommunications and quantum information technologies.
In an article published in the journal Nature Photonics [1], Swiss physicists at the University of Geneva in collaboration with colleagues at the University of Lyon-I and the Free University of Berlin, has outlined a method condensation of atmospheric water induced by laser.