Method and apparatus for communication in an illumination system using a liquid lens

An apparatus for communicating information content by modulation of light in an illumination system, the apparatus comprising:

• a liquid lens optically coupled to the illumination system and capable of modulation of light thereof, the liquid lens having one or more resonance modes;
• a modulation control system operatively coupled to the liquid lens and receiving the information content, the modulation control system being configured to represent at least a portion of the information content as a time-varying configuration of the liquid lens, the time-varying configuration substantially including one or more of said one or more resonance modes of a higher order than a 01 mode;
• and
• a receiver system optically coupled to the liquid lens, the receiver system being configured to decode at least a portion of the information content from a light modulated by the time-varying configuration of the liquid lens.