These lenses have application in solar power such as focusing sunlight on a solar panel.
Fresnel lens and solar panel.
A non imaging spot fresnel lens uses ring shaped segments with cross sections that are straight lines rather than circular arcs.
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.
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.
Solar power concentrated photovoltaic systems.
Fresnel lens using sunlight to heat water in water bottle.
Such a lens can focus light on a small spot but does not produce a sharp image.
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.