SHEILA TERRY / SCIENCE PHOTO LIBRARY SHEILA TERRY / SCIENCE PHOTO LIBRARY
Louis Daguerre (1787-1851), inventor of the first practical system of photography. Since 1821 he had been researching means of obtaining permanently the images produced with the camera obscura. In 1829 he formed a partnership with NicÃ©phore NiÃ©pce, a leader in photochemistry, who had been working on the same problem. Daguerre wrote to NiÃ©pce in 1831 suggesting the use of iodized silver plates following his discovery of the image of itself that a silver spoon lying on an iodized plate had produced. He also found that the non-visible image on the silver plate could be made visible as a positive image by exposure to mercury vapour fumes, giving rise to the concept of the latent image.After further development the Daguerreotype process was introduced in 1839.
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