In the last decades our usage of the Radio Frequency (RF) spectrum has intensified a lot due to the increasing number of mobile devices. The spectrum is getting crowded and new communication alternatives might become necessary in the future. One such alternative is Visible Light Communication (VLC),which uses the visible light spectrum instead of RF. Passive VLC, in particular, combines this property with a low power usage, suited for battery powered devices. However, high data rates are lacking.

This thesis proposes a multi-channel passive VLC system, based on light dispersion principles, as a novel concept to try and enhance these data rates. Results of the system so far only show low data rates however, at a maximum of 4 bits per second. The low data rate in particular is caused by choice of transmitter and receiver, thereby limiting the bandwidth and the number of channels that can be created. Yet, the concept itself is still considered a valid and valuable approach, and higher data rates can be expected from future works.

In this thesis we will see exactly how we can go from light dispersion to creating a multi-channel passive VLC system. As we will see this requires an optical design, a transmitter and a receiver, all of which will be working together. Besides an evaluation of the performance it will give insight in challenges this concept faces and, also, what improvements might increase the system performance.

Though several sensors are available for underwater scanning and ranging, they all have their limits. SONAR sensors are limited in resolution, and scanning mechanisms using a form of light for carrying the data suffer from high attenuation in turbid waters.

The goal of this project was to design a LiDAR system that is capable of overcoming these limitations. To tackle this problem, three groups were formed that focused on different parts of the LiDAR. However, first a complete system overview has been created by the entire project team. First a literature research has been performed. After that, system wide design decisions were discussed and made and also requirements were set. From there on, every subgroup would focus on their own part of the system. In this thesis a more detailed description of the beam steering module shall be given. Again some literature research has been performed. After that, the design decisions were made, based on the requirements. Finally a design was implemented and tested.

For the beam steering module to be successful, it should provide accurate control over the angle at which the laser beam is sent out. Though improvements can be made, the system does comply to the minimum accuracy requirement.