The Million Dollar Lens: The Science and History behind the Fresnel Lighthouse Lens

In 1700 and 1800, open water transport was the source of business viability - which was the only way to transport goods between continents, but that was not easy. Among many difficulties, there are problems with ships, and all valuables are left behind and broken by invisible rocks.

This need has led to the creation and design of many lighthouses on the coastline where marine voyagers will be able to see them too close to a dangerous outcrop. The problem is that it is too late for the captain to see the light because the light is basically a big candle or oil lamp, it is too dark many times. As a result, scientists at the time were looking for ways to further project the light with further focus.

Augustin-Jean Fresnel, a French physicist and engineer, has developed a multi-part Fresnel lens for the lighthouse. His design enables the manufacture of lenses with large aperture and short focal length without the quality and volume required for traditionally designed lenses. Fresnel lenses can be much thinner than similar conventional lenses and in some cases can be in a flattened form. The Fresnel lens can also catch more oblique light from the light source, allowing you to see the light from the lighted lamp even from afar.

The first Fresnel lens was used in the Cordouan lighthouse in the Gironde estuary in 1823, and its light can be seen from over 20 miles (32 km) away. The Fresnel invention increases the brightness of the beacon light by four times, and his system is still widely used.

Seven Fresnel lenses have been developed over the years. These classifications called "orders" were developed to meet all the needs of different lighthouse needs and different coastal environments where each lighthouse is located.

The primary Fresnel lens is the largest lens in the Fresnel lens, with a height of 12 feet or more and a weight of 1 ton. Due to their size and strength, these lenses are mainly used for lighthouses that require a wide range of extremely concentrated signals. These lights are commonly used on coastal lighthouses.

The order of Fresnel lenses is from 4 to 6, because the lens signal and visibility are limited, it is usually in a lake or a harbor.

The glass of the lens was made and handled at a specially designed factory - lost the bomb during the Second World War. It has not been copied for various reasons. This makes the original glass Fresnel lens very rare and valuable. Glass can not be copied, repaired or repaired, manufacturers use acrylics to obtain the same effect at lower cost, but they are not real

Most lighthouse enthusiasts believe that Fresnel lens is the first lens used in the lighthouse. However, this assumption is incorrect as Augustine Fresnel proposed and used many shots in the years before designing his famous shot. This story provides information about these early attempts to use the lens to enhance the optical function of the lighthouse. A few years ago, the American Lighthouse Association's Chad Kaiser photographed a picture that would have been the world's most powerful sign under one billion candles. Yes, that is not a million. I became curious and began studying this light and its history. This story explains a very rare lighthouse in France and how it was formed. It is not really a real beacon in fact. Instead, this is one example of one of the oldest and most powerful airway beacons ever. But first you need to know the current air travel.

In 1822, the French scientist Augustin Fresnel invented the lens and is currently being used on lighthouses all over the world. The lens looks like a huge glass honeycomb with light in the middle. The lens is made of a glass prism ring on the top and bottom of the lamp and bends the light into a bright beam. The Fresnel lighthouse lens works very well and you can see the light over a distance of 20 miles or more. Before the invention of Fresnel, the lighthouse used a mirror to reflect light. These lights can only be seen at short distances and hardly visible on fogy days and stormy days. The lighthouse with Fresnel lens prevents many boats from stranding or striking rocky coast