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Diffused lighting camouflage was a form of active camouflage using counter-illumination to enable a ship to match its background, the night sky, that was tested by the Royal Canadian Navy on corvettes during World War II. The principle was discovered by a Canadian professor, Edmund Godfrey Burr, in 1940.
Diffused lighting camouflage, in which visible light is projected on to the sides of ships to match the faint glow of the night sky, was trialled by Canada's National Research Council from 1941 onwards, and then by the Royal Navy, during the Second World War. Some 60 light projectors were mounted all around the hull and on the ships ...
By directing the light forwards towards an observer (rather than towards the aircraft's skin), the system provided effective and efficient counter-illumination camouflage, more like that of marine animals such as the firefly squid than the Canadian diffused lighting approach. The system never entered active service.
The first of these was the so-called diffused lighting camouflage tested on Canadian Navy corvettes including HMCS Rimouski. This was followed in the United States Army Air Forces with the airborne Yehudi lights project, and trials in ships of the Royal Navy and the US Navy . [ 11 ]
In the diffused lighting camouflage project, the Royal Canadian Navy experimented with variable counter-illumination camouflage to match horizon light levels and minimize ships' silhouettes during prolonged arctic twilight. During the experiments, one side of the test ship was faintly illuminated by projectors mounted outboard.
"Diffused lighting camouflage" was trialled by Canada's National Research Council during the Second World War. It involved projecting light on to the sides of ships to match the faint glow of the night sky, requiring awkward external platforms to support the lamps. [ 105 ]
Camouflage by actively emitting light to match the background, whether in animals or military use. Pages in category "Counter-illumination camouflage" The following 4 pages are in this category, out of 4 total.
The camouflage of predators including lizards, angler fish, mantises including Hymenopus bicornis and the bird-dropping spider is described. "Adventitious protection", making use of materials from the environment, is illustrated with examples such as the decorator crabs and caddis fly larvae, which build tubes "of grains of sand, small shells ...