While commonly found in solar applications, a Fresnel lens collector is ideal for various applications because it is inexpensive, thin, and lightweight.

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Similarly, a thin piece of plastic is used to make a Fresnel lens. It is ridged on one side and flat on the other. It is most suitable for applications where image quality is not necessary.

A solar concentrator using Fresnel lenses is called a Fresnel lens solar concentrator. It takes a large area of sunlight and directs it towards a spot by bending and focusing the light rays.

If you happen to observe a magnifying glass, you must have noticed that it is thick in the middle and tapers at the edges.

Large Fresnel lenses are used as ­solar concentrators. These lenses increase the amount of sun striking individual PV cells with a concentration ratio of 500:1.

In addition to solar panels, Fresnel lenses find application in magnifiers, image formation, and projection lenses in illuminating systems.

You must know the manufacturing of Fresnel lenses to understand their applications. Initially, Fresnel lenses were fabricated by grinding and polishing glass manually. It was a tedious task.

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Fresnel lenses are an asset to solar power systems. Photovoltaic cells are able to collect high amounts of sunlight and thus produce more solar power.

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It gathers sunlight and makes it available for solar panels. So, a Fresnel lens collector has the potential to maximise your benefit from a solar power system.

They are not a new technology and range back to the nineteenth century, but improvements in their manufacturing materials and technologies have increased their use.

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Fresnel lenses are capable of effectively collimating a point source. Place the lens exactly one focal length distant from the source, and it will collimate the light.

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Fresnel lenses create bright light beams using glass prisms in a metal frame. The prisms are mainly responsible for changing the direction the light is travelling in.

Fresnel lenses for solar applications are mostly made from acrylic as it has high transmittance in the visible and ultraviolet (UV) regions. Polycarbonate is also used because of its resistance to impact and high temperature in harsh environments.

Thus, the active surface of the solar cell can be reduced in volume, and only a small volume of silicon solar cell materials will be needed.

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Another implementation of the Fresnel lens is magnification. It is used as a projection lens or magnifier. But this application is the least popular because of the high level of distortion produced.

A Fresnel lens is a succession of concentric rings etched into the plastic. Each ring consists of an element of a simple lens.

Do you know the earliest application of the Fresnel lens? The use of these lenses in lighthouses is amongst the earliest and most popular applications.

Also, the use of a Fresnel lens collector allows reaching high temperatures up to 600°C at very short exposure times of about 1 minute.

Since then, they have been utilised in various applications, including light collimation, magnification, and collection.

One of the most common applications is the collection of solar light. The Fresnel lens collector collects the sunlight, which is nearly parallel.

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Later with the advent of optical-quality plastics and injection-moulding technology, Fresnel lenses were easily made and were practically implemented in various industrial and commercial applications.

A Fresnel lens can also be used for home maintenance like heating a home or pool. Solar heaters and solar cooling systems also use Fresnel lens collectors.

The most striking advantage of a Fresnel lens collector is that it offers the highest solar-to-electric conversion efficiency.

The lens has two sides, a grooved side and a plain side. You must place the grooved side towards the longer conjugate in a finite-conjugate system to get the best performance.

Fresnel lens collector is popularly used as a solar concentrator since it offers high optical efficiency. It has minimal weight and low cost.

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These lightweight lenses can elevate the density of solar energy. Thus, the Fresnel lens collector is perfect for economical photovoltaic power generation.

They have a thin and lightweight construction. Fresnel lenses are available in small as well as large sizes, and their excellent light gathering ability makes them useful in various applications.