State-of-the-art autostereoscopic displays are often limited in size, effective brightness, number of 3D viewing zones, and maximum 3D viewing distances, all of which are mandatory requirements for large-scale outdoor displays. Conventional autostereoscopic indoor concepts like lenticular lenses or parallax barriers cannot simply be adapted for these screens due to the inherent loss of effective resolution and brightness, which would reduce both image quality and sunlight readability. We have developed a modular autostereoscopic multi-view laser display concept with sunlight readable effective brightness, theoretically up to several thousand 3D viewing zones, and maximum 3D viewing distances of up to 60 meters. For proof-of-concept purposes a prototype display with two pixels was realized. Due to various manufacturing tolerances each individual pixel has slightly different optical properties, and hence the 3D image quality of the display has to be calculated stochastically. In this paper we present the corresponding stochastic model, we evaluate the simulation and measurement results of the prototype display, and we calculate the achievable autostereoscopic image quality to be expected for our concept.
The increasing demand for miniaturization and design flexibility of polymer optical waveguides integrated into electrical
printed circuit boards (PCB) calls for new coupling and integration concepts.
We report on a method that allows the coupling of optical waveguides to electro-optical components as well as the
integration of an entire optical link into the PCB. The electro-optical devices such as lasers and photodiodes are
assembled on the PCB and then embedded in an optically transparent material. A focused femtosecond laser beam
stimulates a polymerization reaction based on a two-photon absorption effect in the optical material and locally increases
the refractive index of the material. In this way waveguide cores can be realized and the embedded components can be
connected optically. This approach does not only allow a precise alignment of the waveguide end faces to the
components but also offers a truly 3-dimensional routing capability of the waveguides.
Using this technology we were able to realize butt-coupling and mirror-coupling interface solutions in several
demonstrators. We were also manufacturing demonstrator boards with fully integrated driver and preamplifier chips,
which show very low power consumption of down to 10 mW for about 2.5 Gbit/s. Furthermore, demonstrators with
interconnects at two different optical layers were realized.