The invention will enable ophthalmologists to improve the physical examination of their patients’ ocular fundus and to diagnose pathologies affecting the retina more reliably. Furthermore, the device opens the way towards the development of intelligent glasses, capable of being automatically adapted to the user’s visual deficiencies.
The images we see are formed when light reflects on the objects surrounding us, and then penetrates our eyes and hits the retina. But during this process, light passes through different media (the atmosphere, the cornea, the crystalline lens, the vitreous and aqueous humours) that are neither ideal nor homogenous and, for this reason, imperfections appear in the final image.
A parallel situation takes place in other optical systems (telescopes, microscopes, cameras) whose images are also affected by some type of deformation or degradation. The device developed by UJI and USC allows these shortcomings (optical aberrations, in scientific jargon) to be immediately and automatically measured and corrected.
One of the advantages of the new system with regard to those already existing is that it uses commercial liquid crystal screens of the TNLCD (Twisted Nematic Liquid Crystal) kind which reduce the device manufacturing costs. Under adequate polarisation conditions, liquid crystal screens operate with light and enable the modulation of the electromagnetic field amplitude, which is associated with the light that falls on them; this is obtained when a low computer-controlled voltage is applied to each screen pixel.
Another innovating aspect presented by the device that has been developed and patented by UJI and USC is that, for the first time, it integrates the measuring and counteracting of optical aberrations in one single system element (the liquid crystal screen). In this way, the whole invention can not only determine the degree of imperfection of the image that needs to be corrected, but can also apply the necessary voltage to counteract it. And all this is done quickly and automatically.
The researchers are currently seeking a technological company capable of producing and commercialising the invention. The research has been jointly conducted by the Research Group on Optics from the Department of Physics at UJI and by the Research Group on Wave-Front Sensors and Micro-Optics from the Department of Applied Physics at USC, which are respectively directed by Professors Vicent Climent and Salvador X. Bará.
Hugo Cerdà | alfa
Further Improvement of Qubit Lifetime for Quantum Computers
09.12.2016 | Forschungszentrum Jülich
Electron highway inside crystal
09.12.2016 | Julius-Maximilians-Universität Würzburg
Physicists of the University of Würzburg have made an astonishing discovery in a specific type of topological insulators. The effect is due to the structure of the materials used. The researchers have now published their work in the journal Science.
Topological insulators are currently the hot topic in physics according to the newspaper Neue Zürcher Zeitung. Only a few weeks ago, their importance was...
In recent years, lasers with ultrashort pulses (USP) down to the femtosecond range have become established on an industrial scale. They could advance some applications with the much-lauded “cold ablation” – if that meant they would then achieve more throughput. A new generation of process engineering that will address this issue in particular will be discussed at the “4th UKP Workshop – Ultrafast Laser Technology” in April 2017.
Even back in the 1990s, scientists were comparing materials processing with nanosecond, picosecond and femtosesecond pulses. The result was surprising:...
Have you ever wondered how you see the world? Vision is about photons of light, which are packets of energy, interacting with the atoms or molecules in what...
A multi-institutional research collaboration has created a novel approach for fabricating three-dimensional micro-optics through the shape-defined formation of porous silicon (PSi), with broad impacts in integrated optoelectronics, imaging, and photovoltaics.
Working with colleagues at Stanford and The Dow Chemical Company, researchers at the University of Illinois at Urbana-Champaign fabricated 3-D birefringent...
In experiments with magnetic atoms conducted at extremely low temperatures, scientists have demonstrated a unique phase of matter: The atoms form a new type of quantum liquid or quantum droplet state. These so called quantum droplets may preserve their form in absence of external confinement because of quantum effects. The joint team of experimental physicists from Innsbruck and theoretical physicists from Hannover report on their findings in the journal Physical Review X.
“Our Quantum droplets are in the gas phase but they still drop like a rock,” explains experimental physicist Francesca Ferlaino when talking about the...
16.11.2016 | Event News
01.11.2016 | Event News
14.10.2016 | Event News
09.12.2016 | Life Sciences
09.12.2016 | Ecology, The Environment and Conservation
09.12.2016 | Health and Medicine