In 1924, ARRI began production of the first mirror facet reflector with an electric light bulb and designed a mobile generator fully equipped and powered by an aircraft engine.
At the start of the twentieth century, aircraft engines were simple, low-powered machines that were designed and built one by one for specific aircraft. But very soon, engines started being built in quantity, often by several manufacturers in different countries who were licensed by the designer or initial manufacturer. In the United States, particularly during World War I, automobile manufacturers dominated the aero-engine field until companies that specialized in aircraft engines were established in the 1920s.
Film Industry began to grow by the development of these pioneering technologies combined with the expansion of its film processing laboratory and the installation of further printing machines and developing rooms, alongside modern motion picture cameras were introduced.
Fresnel light
In 1819, the French Government commissioned 34 year old Augustin Jean Fresnel (pronounced Fruh-nell) to develop an improved lighting system for French lighthouses. Fresnel was a physicist who was well known for his experimentation with the theories of light reflection and refraction.
Fresnel instead began investigating ways that glass lenses could be used to concentrate the light source. Since a single lens of sufficient strength would be too large to be practical. Fresnel began looking at ways that multiple lenses surrounding the light source could capture the light rays emitted from a single light source and direct them into a narrow horizontal beam.
