A guy who calls himself grant thompson used a fresnel lens from a dismantled old toshiba projection tv and shows the world on youtube how his diy solar concentrator can scorch nearly anything from pennies and concrete to eggs.
Fresnel lens and solar panel.
A solar concentrator diy can seem like the easiest thing in the world if someone else is doing the hard work.
A fresnel lens is a lens with multiple refracting planes designed to improve the concentration of light coming from many different angles onto a single point or line.
The students pulse pasteurization using a lens and solar energy method uses a fresnel lens which is essentially a large magnifying glass but thinner and lighter in weight and made of acrylic and sunlight to pasteurize water.
These lenses have application in solar power such as focusing sunlight on a solar panel.
By concentrating solar power onto solar cells they can increase the amount of sun striking the solar cell and allow a relatively small amount of silicon photovoltaic pv material to be used in large solar panels.
Solar power concentrated photovoltaic systems.
Fresnel lens using sunlight to heat water in water bottle.