Jack M. A. van den Eerenbeemd

A body-conforming tactile jacket to enrich movie viewing

Adding haptic stimulation to movies is a promising step in creating more emotionally immersive experiences. To explore the potential of this concept, we have created a wearable tactile jacket that is used to deliver movie-specific tactile stimuli to the viewers body that are specifically targeted to influence the viewers emotions. Immersion was evaluated in a user test using questionnaires and physiological measurements. The findings show promising effects of the haptic stimuli that need to be substantiated in further more refined user tests.

Emotion measurement platform for daily life situations

The growing interest in affective computing is expected to have its beneficial impact on consumer lifestyle products. Especially emphatic applications — applications that make you feel they really understand you — will serve the current consumer interest in enhanced and meaningful experiences. To do so, the applications will have to measure the users emotional experience. Well-established psychophysiological techniques bear promise, but so far have mainly been validated in laboratory situations. To also apply them in real-life situations, we built an emotion measurement platform. This platform shows that emotional experiences can be measured in a relatively unobtrusive way, while at the same time it enables us to gather knowledge on emotional experiences in everyday-life and it offers the opportunity to prototype emphatic application concepts and test them in relevant situations.

Near-Field Recording with a Solid Immersion Lens on Polymer Cover-layer Protected Discs

Recent demonstrations have shown that near-field optical recording with a solid immersion lens in a conventional actuator is a strong candidate for optical storage beyond Blu-ray Disc. All results published so far were obtained with so-called first-surface configurations, in which the data layer is not protected by a cover-layer. In this paper we demonstrate a next step towards creating a system suitable for a commercial product with removable discs. First results are presented for read-out of discs with a few µm protective polymer cover-layer and a solid immersion lens with NA=1.45 and λ=405 nm.

Towards a Multi-Layer Near-Field Recording System: Dual-Layer Recording Results

We advocate the use of a polymeric cover layer for protecting the data layer and the tip of the solid immersion lens in near-field optical recording system. With a cover on top of the data layer, the numerical aperture (NA) of the objective lens is limited to the refractive index of the cover material. This means that the maximum attainable NA of cover-incident near-field systems and therefore the maximum achievable storage density is lower compared to that for first surface systems. This lower storage capacity per layer can be more than compensated for by using multiple data layers which is not possible in first-surface systems with bare discs. In this paper we present first experimental results for near-field recording with a solid immersion lens that focuses through a cover layer and a spacer layer onto a data layer, as in a dual-layer near-field disc.

Near Field Recording on First-Surface Write-Once Media with a NA=1.9 Solid Immersion Lens

We present a single-wavelength near field recording set-up with a blue laser and a NA=1.9 solid immersion lens in a conventional focus and tracking actuator. The most important aspects to realize such a near field recording system are discussed, in particular, gap error signal normalization and correction of chromatic aberration of the objective lens. First recording results demonstrate that the set-up is fully operational.

Improved Near-Field Recording System for First-Surface Media with an NA=1.9 Solid Immersion Lens

Near-field optical recording using a solid immersion lens is quickly becoming an attractive technology for use in commercial optical data drives. Calculations and experiments show that Near-field optical recording has the potential to enable data storage capacities of more than 150 GB per side on a compact disc (CD)-sized disc, which may prove sufficient to continue the optical recording roadmap beyond Blu-ray Disc. Compared to alternative approaches that aim to achieve high storage densities, near-field recording requires a minimum change in drive architecture and media technology. In this paper we present our progress on the development of a near-field optical recording system with an NA=1.9 Solid Immersion Lens in a conventional actuator, using a single blue laser diode.

Effects of Polarization on Wave Front Measurements and Manufacturing of Solid Immersion Lenses for Near-Field Optical Recording

Near-field optical recording with a solid immersion lens (SIL) is a promising and logical technology for commercial optical data drives with data storage densities beyond that of Blu-ray Disc. In many aspects the technology of near-field recording with a SIL is very similar to conventional optical recording, however for lenses with a numerical aperture (NA) exceeding unity certain optical effects occur that do not play a role in conventional optical recording systems. An example of one such effect that we found in practice is a polarization induced spurious wave front aberration. In this paper we report on the analysis and correction of those polarization induced spurious wave front aberrations in NA>1 Solid Immersion Lenses and in particular for the NA=1.9 lenses used in our experimental near-field optical recorder.

Compact system description for systems comprising a tilted plane parallel plate

A paraxial model describing the astigmatism generated by a plane-parallel plate is derived. This model fits the framework of the 4x4 matrix formalism that Arsenault used to describe cylindrical lenses. The framework including this new model is used to build a compact system description of a plane-parallel plate combined with a cylindrical lens, from which several imaging properties are derived. Calculation results are compared with ray-trace simulation results and measurements. Both the ray-trace and the experimental results are in excellent agreement with the calculated results.

Effects of Polarization on Design and Manufacturing of Solid Immersion Lenses for Near-Field Optical Recording

We report on the analysis and correction of polarization induced spurious wave front aberrations in NA>1 Solid Immersion Lenses, in particular for the NA=1.9 and NA=1.45 lenses used in our experimental near-field optical recorder.

Near-Field Recording with a Solid Immersion Lens on Polymer Cover-Layer Protected Discs

As a next step in near - field optical recording with a solid immersion lens in a conventional actuator, first results are presented for read - out of discs with a few μm protective polymer cover - layer and a lens with NA = 1.45.