Both art and science are greatly shaped by their times. Even if the world of art evolved independently from science and technology, it did avail itself of them. Early Renaissance artists such as Da Vinci, Michelangelo and Raphael were universal geniuses of their time and combined the arts with science. They refined their painting techniques not only by developing higher-quality paint colors, but also by studying light, an elementary component of art. Albrecht Dürer, for instance, carried out extensive research to reproduce light as realistically as possible. His findings had a decisive impact on the further development of painting. Three centuries later, the impressionists, as for example Claude Monet, were intent on capturing the mood of light in their pictures. Throughout their lives, they worked on refining a variety of special techniques in order to achieve this aim.
With the invention of photography in the mid-nineteenth century , light design entered a new era. It was now possible to capture light directly, and thus form and frame it as well. Another milestone was the transition from analog to digital photography. If analog photography can still be interpreted as light painting, digital photography in comparison is light measurement – and as such, an element of photonics.
Art has been rapidly evolving since the dawn of digital technology. The works of established artists, e.g. David Hockney, have significantly contributed to this development , while thanks to the advance of photonics, the necessary technology has become accessible to the broader public.
INTEGRATION OF PHOTONICS IN THE ARTS
The integration of photonics in the arts is a major component of the International Year of Light (IYL). At Offenburg University’s department of Media and Information, we utilized this context and encouraged our students to create their own art posters. The following milestones of the IYL 2015 served as starting points for the students, who went on to produce their individual interpretations of the events:
1015: Alhazen, Arabian mathematician, physicist and optician - inventor of the magnifying lens (loupe) –, completes his seven-volume treatise, “Treasure of Optics” 
1615: French-Huguenot engineer Salomon de Caus invents the prototype of a solar-driven engine ,
Selected examples of this interdisciplinary project are shown in figure 1 below. Students were also allowed to bring in their own ideas in the creation of the art posters. As a result, more recent events were incorporated as well. Most prominently, the 2014 FIFA World Cup was picked up as a topic, which resulted in the independent poster series, “No football – just photonics.” The core idea of the series is to transfer optical components and devices: an optical comb generator, Raman scattering, a photo coupler, an optical ring resonator, an optical fiber, an optical amplifier, a Mach-Zehnder coupler, as well as erbium-doped fiber amplifiers, all working their magic on a soccer field (see figure 2) .
The feedback on the first presentations of the poster series to the optical community (SPIE – International Society for Optics and Photonics, OSA - Optical Society of America, EPS - European Physical Society)  was exceedingly positive. After receiving a large number of requests, we decided to make the students’ designs accessible to the worldwide community.
BUILDING A WORLDWIDE COMMUNITY PLATFORM
To achieve the most far-reaching effect, the website on the International Year of Light 2015 went online in April 2013. The website has a clear and simple design and reaches beyond the experts to get the broad public interested and involved in the IYL. Everybody can participate directly. Both the entirely positive feedback and the access numbers are proof that this aim has been achieved: With more than 4,100 unique visitors from around the world, the website has become an essential element of the worldwide community. Globally active companies apparently confirm the website’s success – try googling “International Year of Light 2015” in this regard. Beyond the availability of information, much of this success is certainly due to the possibility to become actively involved in the project. Applying a variety of web technologies, what started as a static website has been turned into a lively community platform.
Web 2.0 has been established for many years now and enriches our daily life in almost every aspect. Visitors to a website are now able to not only consume its contents, but contribute to them as well. One such “user-generated content” on the IYL website is a world map where every visitor can register their locations. The address data are automatically converted into geo-coordinates, allowing for exact positioning. As an optical highlight, the IYL logo appears on the world map instead of the usual marker. Thus every user can signal their support for the IYL to the global community. The database installed to register these signals shows that since July 2013, more than 305 visitors to the website have placed their individual markers this way. That this success started well before the United Nations in New York officially proclaimed (on 20 December 2013)  that 2015 would be the International Year of Light and Optical Technologies, also proves the awareness-raising function of the website. It is thus the merit of the entire community that the UN, based on the map entries, could see the worldwide interest in the subject and went on to establish 2015 as the International Year of Light.
To present the IYL adequately around the world, Offenburg University students designed creative posters in the context of a lecture on digital design. These high-resolution, printable posters were also stored on the website for downloading. After a registration process, visitors can download a great variety of designs related to the IYL. This allows for exhibitions and events on the subject of the IYL to be organized and marketed without incurring considerable costs. So far, the posters have been presented to larger audiences at the following events:
International Congress Center at Laser Munich (May 2013): European Conference on Lasers; Electro-Optics, International Quantum Electronics Conference OSA, EPS, Optical Metrology 2013 SPIE
Education & Training in Optics & Photonics in Porto (July 2013): OSA, SPIE, EPS Conference
Optics & Photonics in San Diego (August 2013): SPIE Conference
Frontiers in Optics in Orlando (October 2013): OSA Conference
Opening Ceremony, UNESCO Headquarters in Paris (January 2015, in planning)
The download numbers also demonstrate the popularity of these posters among professionals and private individuals alike: As of June 2014, a total of 1,502 files have been downloaded from the website by 200 registered users, including school students, university student chapters, scientists, professors, but also private individuals interested in the subject. The posters have been used for various educational purposes and PR work, such as locally announcing the IYL. Some users have also contacted us offering their help, e.g. to translate the posters into their native language or to print them as postcards or t-shirts.
CONCLUSIONS AND PERSPECTIVES
We have been very happy about this opportunity to present our students’ works to the world at the same time as supporting the special cause of making the IYL happen and publicizing it. The project continues to be exciting; currently, as of 22 July 2014, our website (http://www.magic-of-light.org/iyl2015) comes in second place when googling the search term “International Year of Light”! With it we hope to awaken young people’s interest and enthusiasm for physics, and for optics in particular, as a science of the future.
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