Jean Guy Marie Josef chevalier de Wouters d'Oplinter (1905 – 1973) was a Belgian inventor and aeronautical engineer.
He was born in Brussels.
In 1957, he created the Calypso-Phot for Jacques-Yves Cousteau under their La Spirotechnique company name.
It was later licensed to Nikon, where it became the Nikonos, (for a period sold in Europe as the Calypso-Nikkor).
De Wouters apparently worked in aviation earlier in life, possibly during World War II, since he holds several patents for airplane improvements dating to that time period.