Design of the inductive power supply system for the artificial accommodation system

The Artificial Accommodation System is a micro mechatronic system which will be implanted into the capsular bag to replace the human crystalline lens. Depending on the patients' actual need for accommodation, the system autonomously adapts the refractive power of its integrated optical element in a way that the projection on the patients' retina results in a sharp image. As the Artificial Accommodation System is an active implant, its subsystems have to be supplied with electrical energy. Therefore an inductive power supply system will be developed which is able to autonomously power the Artificial Accommodation System over a period of 24h and can be recharged wirelessly. This Paper describes the design process of the coils needed for inductively transferring power to the implant. It can be shown that by means of optimization it is possible to transfer 50 mW of power to the interior of the Artificial Accommodation System.