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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 ...
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 ]
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.
Thayer's 1902 patent application. He failed to convince the US Navy. The English zoologist Edward Bagnall Poulton, author of The Colours of Animals (1890) discovered the countershading of various insects, including the pupa or chrysalis of the purple emperor butterfly, Apatura iris, [2] the caterpillar larvae of the brimstone moth, Opisthograptis luteolata [a] and of the peppered moth, Biston ...
Camouflage is the concealment of animals or objects of military interest by any combination of methods that helps them to remain unnoticed. This includes the use of high-contrast disruptive patterns as used on military uniforms , but anything that delays recognition can be used as camouflage.
Methods include camouflage, nocturnality, subterranean lifestyle and mimicry. Crypsis can involve visual, olfactory (with pheromones) or auditory concealment. When it is visual, the term cryptic coloration, effectively a synonym for animal camouflage, is sometimes used, but many different methods of camouflage are employed in nature.
Camouflage researcher Roy Behrens cites and discusses Adaptive Coloration frequently in his writings. For example, in his Camoupedia blog, related to the book of the same name, [ 12 ] he writes of Cott's drawings of the hind limbs of the Common frog: "Reproduced above is one of my favorite drawings from what is one of my favorite books."