Tekniska Museet
100 Innovations - Tekniska museet

An exhibition at the National Museum of Science and Technology in Stockholm, 2012 – 2018

The lighthouse

The lighthouse

Ingress för att beskriva innovationen

The lighthouse

This Fresnel lens for an airport lighthouse was manufactured by AGA in 1961. Fresnel lenses make lighthouses visible over large distances. Photo: Ellinor Algin.

The lighthouse

This drawing from 1818 shows plans for rebuilding of Långe Jan, a lighthouse on Öland’s coast. Photo: Emre Olgun, National Archives of Sweden.

Kort fakta om innovationen

Kort fakta (2) om innovationen

Rubrik för små genier

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The lighthouse

When ships became so large that they could leave the  safety of the coastline and also sail at night there was a need for lighthouses. Already in The Iliad Homer describes night sailings in the Mediterranean where fire on shores guided ships into the port. Initially, they burned on high cliffs and towers. In time lighthouses became more and more sophisticated. In 1912, Gustaf Dalén was awarded the Nobel Prize in Physics for his inventions of automatic regulators for lighthouses.

The production of light acts as a landmark, it is high and shines brightly. Smaller beacons were used for navigation in harbour entrances and along shipping lines. In the age of satellite navigation the importance of the lighthouse has declined dramatically and many lighthouses have now been turned off for good.

Rubrik för nördar

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