Lou Ottens

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Lou Ottens (June 21, 1926 – March 6, 2021) was a Dutch engineer and inventor known for creating the cassette tape and helping to develop the compact disc. He spent his entire career at Philips.

Born in Bellingwolde, Netherlands, Ottens loved tinkering from childhood. As a teenager during World War II, he built a radio with a directional antenna to listen to Radio Oranje while avoiding jammers. After the war, he studied mechanical engineering at Delft University of Technology and worked part-time for an X-ray factory. He graduated in 1952 and joined Philips in Eindhoven.

Ottens soon moved to Hasselt, Belgium, where Philips made audio gear. In 1960 he became head of the new product development department. He led the creation of Philips’ first portable tape recorder, the EL 3585, which sold more than a million units. Building on this success, he and his team designed the first pocket-sized cassette recorder, the EL 3300. Ottens led a small team of designers and used ideas from Philips’ Eindhoven site. In 1963 Philips publicly introduced the cassette system at the IFA trade show in Berlin. At first the system did not win quick recognition, but it would become the world standard after Philips shared its patent for free with other manufacturers, helping rivals like Sony adopt the format.

Ottens became director of Philips Hasselt in 1969 as cassette systems grew in popularity. In 1972 he became technical director of Philips’ Audio division. He saw potential in laser technology from Philips’ NatLab to improve audio. After early experiments with analog laser discs, Ottens and his team pushed into digital technology. In 1977 they created a first test model of the digital disc, and Ottens formed a dedicated disc development lab. The first full CD model was ready in 1979, and Ottens helped secure support in Japan from Sony, leading to a joint standard that helped CDs become a global format.

Later, Ottens led Philips’ Video division on a new video cassette system, Video 2000, but it failed to compete with VHS and was cancelled in 1985. After retirement, he remained active in technology and served as chairman of the Dutch Association for Logistics Management in 1988. Ottens appeared in a 2016 documentary about cassettes. He died in Duizel, Netherlands, in 2021 at the age of 94.