In 1949, Belgian engineer Jean de Wouters of Oplinter filed the patent for an autonomous underwater camera (without special housing). The French Jacques Cousteau (1910-199 is aware of this type of apparatus of a new concept To meet its requirements, the camera will be built by ATOMS ATOMS of Nice (France) and sold by "La Spirotechnique". The camera takes the name "Calypso" in reference to the oceanographic ship of Commander Cousteau.
This model 1 can work up to 1 / 1000th whereas model 2 (1961) is limited to 1 / 500th. Waterproof up to 60 meters deep.
In 1963 Nikon (Japan) bought the rights. "Calypso" became "Nikonos".