Technology

How It Works

 

liquid-lens-diagramThe Optilux Liquid Lens delivers autofocus (AF) and optical image stabilization (OIS) functionality with no moving parts. The lens can adapt rapidly and continuously thru diverging, converging and tilting the lens to support both AF & OIS using very low power.

Our technology uses the Electrowetting principle. Electrowetting characteristics allow for the lenses to change shape in real time. Optilux’s technology has revolutionized the industry to produce high performance liquid lenses on a large scale low cost production. They are real-time programmable using a proprietary software platform that performs focus and stabilization in a very fast, repeatable, precise and controlled way.

Applied voltage changes the radius of curvature or focus of the lens

Electrowetting: Voltage variation induces a change in the contact angle of the fluid and creates a lens with the precise desired properties.

In the drawings below the Electrowetting principle is explained in the most very basic configuration to show the changing contact angle of a polar fluid:

First a drop of a non-polar fluid (oil) is deposited on a planar surface, made of a flat electrode covered with a thin insulating and hydrophobic layer, all of this being immersed in a polar fluid (water) based conducting liquid. Voltage is applied between the flat substrate electrode and another electrode dipped in the conducting liquid (not shown on the photographs).

Electowetting Voltage Variation Schematic

 

 

 

 

Two important characteristics of the Electrowetting fluid actuation: linearity (precision) and reversibility (or hysteresis free). Both are key for making a liquid lens, in addition to a number of other suitable design choices.