Session 1 – Imaging
Multi-aperture-cameras were mainly discussed at the first session of the symposium. Jacques Duparré (Pelican Imaging) presented the latest developments regarding ultra-flat cameras for the smartphone industry. The next speaker was Ziv Attar from Linx Imaging (Israel). He explained the difficulties of multi-aperture-imaging, for example the producibility of optical components, missing guidelines, the compatibility of sensors and casings, as well as the necessary computing power. On the other hand Ziv Attar outlined the advantages of multi-aperture-cameras, for instance the low height, the simple color-filter-technology, the extremely deep focus, the very large viewing angle and the independent control of each camera in the array.
Session 2 – Projection
Mini-projectors were discussed more closely in the second session. Ralf Waldhäusl (Sypro Optics Jena) explained the advantages of “pocket sized” projectors. The advantages stem from few maintenance intervals that occur because of the avoidance of moving parts, the low weight of the projectors and a low sensibility regarding vibration and jolts. Subsequently Stefan Morgott (Osram GmbH) explained the challenges of LED-light-sources in micro-projectors. In the area of smartphone applications Ulrich Streppel (Osram GmbH) offered a solution to improve the camera flash light in Micro-Fresnel-Lenses. Afterwards Marcel Sieler (Fraunhofer IOF) presented an ultra-flat array-projection-optic and a completed projector with a very high luminosity. Many more presentations were held during the first day, one of those by Uwe Vogel (Fraunhofer COMEDD) and Peter Schreiber (Fraunhofer IOF) who described new developments in the field of head-mounted displays and near-to-eye projections.
Session 3 – Technology
In the third session the symposium focused on the micro-optic technology. Stephan Heimgartner (Heptagon) gave a lecture on Wafer-Level-Packaging-Technology and Heptagons technical solutions for multi-aperture cameras. Following this presentation Zouhair Sbiaa (Nemotec) showcased on top of a HD 720p sensor the prototype of a micro-optical component. In the field of light-field cameras Steven Oliver (Lytro) presented his company´s current solutions. Examples are depth-dependent filter and a small manipulation of the perspective view after the image is taken. Andreas Spickermann (Fraunhofer IMS) presented his institute´s technical innovations regarding application-specific CMOS-image-sensors. Palle Dinesen (Kaleido) showed an approach for micro-optics, which are entirely made of glass. They are thinner and thermally more stable than plastic lenses. Pierre Crean (poLight) presented a new autofocus system for mobile phone applications. The key advantages lie in the short reaction times of 1 ms, in the low power consumption and in its small size.
Session 4 – Light field
In session 4 plenoptic cameras were addressed. Bernd Jähne (HCI) explained the benefits of the plenoptic cameras in the extraction of 3D-data. The university developed a new algorithm, which allows a very accurate estimation of the depth even on reflective surfaces. Christian Perwass (Raytrixx) described the hundred years of history of the plenoptic camera and the technology leaps in the last few years. Only because of these developments the camera system is again of interest for the industry. At the end of the symposium Alexander Oberdörster (Fraunhofer IOF) explained how electronic cluster eyes are able to absorb light fields more easily and cheaply than plenoptical cameras.