How a liquid lens works (electrowetting)

A liquid lens works by changing the shape of a water drop by creating an electrostatic field that pulls on the water molecules. I show how water can be affected by a high voltage supply and an electrostatically charged comb.

The process by which the droplet changes shape is known as electrowetting.

Liquid lens video

Repost for new video on liquid lenses:



This is a project that I built a few years ago when I learned about liquid lenses. They are quite useful for optical paths with small diameters.

http://www.supertex.com/pdf/datasheets/HV892.pdf

http://varioptic.com/en/products.html

http://benkrasnow.blogspot.com/2009/07/experimenting-with-liquid-lens.html