State of The Art

The human eye has now become the inspiration of German engineers who have been attempting to build a brand new imaging system that works to focus on light. There is always a need and requirement for advancement in technology to assist medical research and scientific devices used for early detection of human diseases. The race has been on to develop a piece of hardware that is small enough to be of use in such fields.

Research engineers from the University of Freiburg have been using malleable lenses with a liquid component that acts similar to the human iris to replace the more common solid type lenses.

The human eye processes light in a very complex manner and as such you would immediately think that the engineering of such a device would be extremely intricate and difficult. However the process proved far simpler and the devise is a simple system formed of muscles that will push a soft lens out of its formed shape to amend the focal length.

A silicone lens was embedded in several tiny motors that then adjust the focus by deforming the malleable lens. The replacement for the " iris" was made of two liquids encased in a  flat bed chamber, one being opaque and an oil based clear liquid that keeps the two separated within the chamber. The liquids were manipulated using electro-wetting which marginally changes their properties allowing the engineers to expand and contract the ring formed by the two opposing liquids to let in more or less light through the clear liquid at the very core.

The research is nothing less than state of the art for a tuneable lens.