Photogram
A photogram is a photographic image made without a camera by placing objects directly onto the surface of a light-sensitive material such as photographic paper and then exposing it to light. The usual result is a negative shadow image that shows variations in tone that depends upon the transparency of the objects used. Areas of the paper that have received no light appear white; those exposed for a shorter time or through transparent or semi-transparent objects appear grey, while fully exposed areas are black in the final print. The technique is sometimes called cameraless photography. It was used by Man Ray in his exploration of rayographs. Other artists who have experimented with the technique include László Moholy-Nagy, Christian Schad (who called them "Schadographs"), Imogen Cunningham and Pablo Picasso. Variations of the technique have also been used for scientific purposes, in shadowgraph studies of flow in transparent media and in high-speed Schlieren photogra ... [...More Info...]       [...Related Items...]     OR:     [Wikipedia]   [Google]   [Baidu]   |
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Anna Atkins
Anna Atkins (née Children; 16 March 1799 – 9 June 1871) was an English botanist and photographer. She is often considered the first person to publish a book illustrated with photographic images. Some sources say that she was the first woman to create a photograph. Early life Atkins was born in Tonbridge, Kent, England in 1799. Her mother, Hester Anne Children, "didn't recover from the effects of childbirth" and died in 1800. Anna was close to her father John George Children, a renowned chemist, mineralogist, and zoologist. Anna "received an unusually scientific education for a woman of her time." Her detailed engravings of shells were used to illustrate her father's translation of Lamarck's ''Genera of Shells''. In 1825, she married John Pelly Atkins, a London West India merchant, later sheriff, and proponent of railways; during this same year, she moved to Halstead Place, the Atkins family home in Halstead, near Sevenoaks, Kent. They had no children. Atkins pursued her i ... [...More Info...]       [...Related Items...]     OR:     [Wikipedia]   [Google]   [Baidu]   |
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Man Ray
Man Ray (born Emmanuel Radnitzky; August 27, 1890 – November 18, 1976) was an American visual artist who spent most of his career in Paris. He was a significant contributor to the Dada and Surrealism, Surrealist movements, although his ties to each were informal. He produced major works in a variety of List of artistic media, media but considered himself a painter above all. He was best known for his pioneering photography, and was a renowned fashion photography, fashion and portrait photographer. He is also noted for his work with photograms, which he called "rayographs" in reference to himself. Biography Background and early life During his career, Man Ray allowed few details of his early life or family background to be known to the public. He even refused to acknowledge that he ever had a name other than Man Ray.Neil Baldwin (writer), Baldwin, Neil. ''Man Ray: American Artist''; Da Capo Press; (1988, 2000) Man Ray's birth name was Emmanuel Radnitzky. He was born in ... [...More Info...]       [...Related Items...]     OR:     [Wikipedia]   [Google]   [Baidu]   |
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Christian Schad
Christian Schad (21 August 189425 February 1982) was a German painter and photographer. He was associated with the Dada and the New Objectivity movements. Considered as a group, Schad's portraits form an extraordinary record of life in Vienna and Berlin in the years following World War I.CHRISTIAN SCHAD AND THE NEUE SACHLICHKEIT, March 14-June 9, 2003 . Life Schad was born in ,[...More Info...]       [...Related Items...]     OR:     [Wikipedia]   [Google]   [Baidu]   |
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X-ray
An X-ray, or, much less commonly, X-radiation, is a penetrating form of high-energy electromagnetic radiation. Most X-rays have a wavelength ranging from 10 picometers to 10 nanometers, corresponding to frequencies in the range 30 petahertz to 30 exahertz ( to ) and energies in the range 145 eV to 124 keV. X-ray wavelengths are shorter than those of UV rays and typically longer than those of gamma rays. In many languages, X-radiation is referred to as Röntgen radiation, after the German scientist Wilhelm Conrad Röntgen, who discovered it on November 8, 1895. He named it ''X-radiation'' to signify an unknown type of radiation.Novelline, Robert (1997). ''Squire's Fundamentals of Radiology''. Harvard University Press. 5th edition. . Spellings of ''X-ray(s)'' in English include the variants ''x-ray(s)'', ''xray(s)'', and ''X ray(s)''. The most familiar use of X-rays is checking for fractures (broken bones), but X-rays are also used in other ways. ... [...More Info...]       [...Related Items...]     OR:     [Wikipedia]   [Google]   [Baidu]   |
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László Moholy-Nagy
László Moholy-Nagy (; ; born László Weisz; July 20, 1895 – November 24, 1946) was a Hungarian painter and photographer as well as a professor in the Bauhaus school. He was highly influenced by constructivism and a strong advocate of the integration of technology and industry into the arts. The art critic Peter Schjeldahl called him "relentlessly experimental" because of his pioneering work in painting, drawing, photography, collage, sculpture, film, theater, and writing. He also worked collaboratively with other artists, including his first wife Lucia Moholy, Walter Gropius, Marcel Breuer, and Herbert Bayer. His largest accomplishment may be the School of Design in Chicago, which survives today as part of the Illinois Institute of Technology, which art historian Elizabeth Siegel called "his overarching work of art". He also wrote books and articles advocating a utopian type of high modernism. Early life and education (1895–1922) Moholy-Nagy was born László Weisz in B ... [...More Info...]       [...Related Items...]     OR:     [Wikipedia]   [Google]   [Baidu]   |
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Thomas Wedgwood (photographer)
Thomas Wedgwood (14 May 1771 – 10 July 1805) was an English photographer and inventor. He is most widely known as an early experimenter in the field of photography. He is the first person known to have thought of creating permanent pictures by capturing camera images on material coated with a light-sensitive chemical. His practical experiments yielded only shadow image photograms that were not light-fast, but his conceptual breakthrough and partial success have led some historians to call him "the first photographer". Life Thomas Wedgwood was the fifth child of eight born to Josiah Wedgwood and his wife Sarah, nee Wedgwood, his third cousin. His father was the founder of the Wedgwood company. He was an uncle of the English naturalist Charles Darwin, through his sister Susannah Wedgwood who married Robert Darwin. He was born in Etruria, Staffordshire, now part of the city of Stoke-on-Trent in England. Wedgwood grew up and was educated at Etruria, and was instilled from his yo ... [...More Info...]       [...Related Items...]     OR:     [Wikipedia]   [Google]   [Baidu]   |
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William Henry Fox Talbot
William Henry Fox Talbot FRS FRSE FRAS (; 11 February 180017 September 1877) was an English scientist, inventor, and photography pioneer who invented the salted paper and calotype processes, precursors to photographic processes of the later 19th and 20th centuries. His work in the 1840s on photomechanical reproduction led to the creation of the photoglyphic engraving process, the precursor to photogravure. He was the holder of a controversial patent that affected the early development of commercial photography in Britain. He was also a noted photographer who contributed to the development of photography as an artistic medium. He published '' The Pencil of Nature'' (1844–46), which was illustrated with original salted paper prints from his calotype negatives and made some important early photographs of Oxford, Paris, Reading, and York. A polymath, Talbot was elected to the Royal Society in 1831 for his work on the integral calculus, and researched in optics, chemistry, e ... [...More Info...]       [...Related Items...]     OR:     [Wikipedia]   [Google]   [Baidu]   |
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Photography
Photography is the art, application, and practice of creating durable images by recording light, either electronically by means of an image sensor, or chemically by means of a light-sensitive material such as photographic film. It is employed in many fields of science, manufacturing (e.g., photolithography), and business, as well as its more direct uses for art, film and video production, recreational purposes, hobby, and mass communication. Typically, a lens is used to focus the light reflected or emitted from objects into a real image on the light-sensitive surface inside a camera during a timed exposure. With an electronic image sensor, this produces an electrical charge at each pixel, which is electronically processed and stored in a digital image file for subsequent display or processing. The result with photographic emulsion is an invisible latent image, which is later chemically "developed" into a visible image, either negative or positive, depending on the purp ... [...More Info...]       [...Related Items...]     OR:     [Wikipedia]   [Google]   [Baidu]   |
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Photographic Paper
Photographic paper is a paper coated with a light-sensitive chemical formula, like photographic film, used for making photographic prints. When photographic paper is exposed to light, it captures a latent image that is then developed to form a visible image; with most papers the image density from exposure can be sufficient to not require further development, aside from fixing and clearing, though latent exposure is also usually present. The light-sensitive layer of the paper is called the emulsion. The most common chemistry was based on silver halide (the focus of this page) but other alternatives have also been used. The print image is traditionally produced by interposing a photographic negative between the light source and the paper, either by direct contact with a large negative (forming a contact print) or by projecting the shadow of the negative onto the paper (producing an enlargement). The initial light exposure is carefully controlled to produce a gray scale image on th ... [...More Info...]       [...Related Items...]     OR:     [Wikipedia]   [Google]   [Baidu]   |
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Humphry Davy
Sir Humphry Davy, 1st Baronet, (17 December 177829 May 1829) was a British chemist and inventor who invented the Davy lamp and a very early form of arc lamp. He is also remembered for isolating, by using electricity, several elements for the first time: potassium and sodium in 1807 and calcium, strontium, barium, magnesium and boron the following year, as well as for discovering the elemental nature of chlorine and iodine. Davy also studied the forces involved in these separations, inventing the new field of electrochemistry. Davy is also credited to have been the first to discover clathrate hydrates in his lab. In 1799 he experimented with nitrous oxide and was astonished at how it made him laugh, so he nicknamed it "laughing gas" and wrote about its potential anaesthetic properties in relieving pain during surgery. Davy was a baronet, President of the Royal Society (PRS), Member of the Royal Irish Academy (MRIA), Fellow of the Geological Society (FGS), and a member ... [...More Info...]       [...Related Items...]     OR:     [Wikipedia]   [Google]   [Baidu]   |
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Sunburn
Sunburn is a form of radiation burn that affects living tissue, such as skin, that results from an overexposure to ultraviolet (UV) radiation, usually from the Sun. Common symptoms in humans and animals include: red or reddish skin that is hot to the touch or painful, general fatigue, and mild dizziness. Other symptoms include blistering, peeling skin, swelling, itching, and nausea. Excessive UV radiation is the leading cause of (primarily) non-malignant skin tumors,World Health Organization, International Agency for Research on Cance"Do sunscreens prevent skin cancer" Press release No. 132, 5 June 2000World Health Organization, International Agency for Research on Cance"Solar and ultraviolet radiation"IARC Monographs on the Evaluation of Carcinogenic Risks to Humans, Volume 55, November 1997 and in extreme cases can be life-threatening. Sunburn is an inflammatory response in the tissue triggered by direct DNA damage by UV radiation. When the cells' DNA is overly damag ... [...More Info...]       [...Related Items...]     OR:     [Wikipedia]   [Google]   [Baidu]   |