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Teleidoscope
A teleidoscope is a kind of kaleidoscope, with a lens and an open view, so it can be used to form kaleidoscopic patterns from objects outside the instrument, rather than from items installed as part of it. Invented by John Lyon Burnside III and Harry Hay, the patent was filed in 1970 and granted in 1972. The lens at the end of the tube is not an optical requirement, but protects the internals of the teleidoscope. A spherical ball lens A ball is a round object (usually spherical, but can sometimes be ovoid) with several uses. It is used in ball games, where the play of the game follows the state of the ball as it is hit, kicked or thrown by players. Balls can also be used ... is often used. An advantage of using a sphere is that it will not press flat against the object being viewed, which would block all light and result in no image being seen. External links *Kaleidoscopes Periods & Styles Brewster Kaleidoscope Society References Optical toys American invention ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Kaleidoscope
A kaleidoscope () is an optical instrument with two or more reflecting surfaces (or mirrors) tilted to each other at an angle, so that one or more (parts of) objects on one end of these mirrors are shown as a regular symmetrical pattern when viewed from the other end, due to repeated reflection. These reflectors are usually enclosed in a tube, often containing on one end a cell with loose, colored pieces of glass or other transparent (and/or opaque) materials to be reflected into the viewed pattern. Rotation of the cell causes motion of the materials, resulting in an ever-changing view being presented. Etymology Coined by its Scottish inventor David Brewster, "kaleidoscope" is derived from the Ancient Greek word καλός (''kalos''), "beautiful, beauty", εἶδος (''eidos''), "that which is seen: form, shape" and σκοπέω (''skopeō''), "to look to, to examine", hence "observation of beautiful forms." It was first published in the patent that was granted on July 10 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
John Burnside (inventor)
John Lyon Burnside III (November 2, 1916 – September 14, 2008) was an American inventor and gay rights activist, known for inventing the teleidoscope, darkfield kaleidoscope, and the Symmetricon. Because he rediscovered the math behind kaleidoscope optics, makers of optically correct kaleidoscopes sold in the United States paid him royalties for decades. Burnside was the life partner of Harry Hay from 1962 until Hay's death in 2002. Burnside was living in San Francisco, at the time of his death on September 14, 2008, from complications of brain cancer. Early life An only child born in Seattle, he was raised by his mother after his father abandoned the family; being poor, she periodically placed her son in the care of orphanages. He served briefly in the United States Navy, and settled in Los Angeles in the 1940s. Gay rights activism Burnside and Hay formed the Circle of Loving Friends in 1965, a group that promoted gay rights and gay love. In May 1966, the two were part of one ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sakura Teleidoscope 1 (6959695112)
A cherry blossom, also known as Japanese cherry or sakura, is a flower of many trees of genus ''Prunus'' or ''Prunus'' subg. ''Cerasus''. They are common species in East Asia, including China, Korea and especially in Japan. They generally refer to ornamental cherry trees, not to be confused with cherry trees that produce fruit for eating.Toshio Katsuki. (2015) ''Sakura''. pp.14–18 Iwanami Shoten. It is considered the national flower of Japan. Wild species of the cherry tree is widely distributed mainly in the Northern hemisphere. In the mainstream classification in Europe and North America, cherry trees for ornamental purposes are classified into the genus ''Prunus'' which consists of about 400 species. In the mainstream classification in Japan, China, and Russia, on the other hand, ornamental cherry trees are classified into the genus ''Cerasus'', which consists of about 100 species separated from the genus ''Prunus'', and the genus ''Cerasus'' does not include ''Pru ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lens (optics)
A lens is a transmissive optical device which focuses or disperses a light beam by means of refraction. A simple lens consists of a single piece of transparent material, while a compound lens consists of several simple lenses (''elements''), usually arranged along a common axis. Lenses are made from materials such as glass or plastic, and are ground and polished or molded to a desired shape. A lens can focus light to form an image, unlike a prism, which refracts light without focusing. Devices that similarly focus or disperse waves and radiation other than visible light are also called lenses, such as microwave lenses, electron lenses, acoustic lenses, or explosive lenses. Lenses are used in various imaging devices like telescopes, binoculars and cameras. They are also used as visual aids in glasses to correct defects of vision such as myopia and hypermetropia. History The word ''lens'' comes from '' lēns'', the Latin name of the lentil (a seed of a lentil plant), ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Harry Hay
Henry "Harry" Hay Jr. (April 7, 1912 – October 24, 2002) was an American gay rights activist, communist, and labor advocate. He was a co-founder of the Mattachine Society, the first sustained gay rights group in the United States, as well as the Radical Faeries, a loosely affiliated gay spiritual movement. Born to an upper middle class family in England, Hay was raised in Chile and California. From an early age, he acknowledged his same-sex sexual attraction, and came under the influence of Marxism. Briefly studying at Stanford University, he subsequently became a professional actor in Los Angeles, where he joined the Communist Party USA, becoming a committed activist in left-wing labor. As a result of societal pressure, he attempted to become heterosexual by marrying a female Party activist in 1938, with whom he adopted two children. Recognizing that he remained homosexual, his marriage ended and in 1950 he founded the Mattachine Society. Although involved in campaigns fo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ball Lens
A ball is a round object (usually spherical, but can sometimes be ovoid) with several uses. It is used in ball games, where the play of the game follows the state of the ball as it is hit, kicked or thrown by players. Balls can also be used for simpler activities, such as catch or juggling. Balls made from hard-wearing materials are used in engineering applications to provide very low friction bearings, known as ball bearings. Black-powder weapons use stone and metal balls as projectiles. Although many types of balls are today made from rubber, this form was unknown outside the Americas until after the voyages of Columbus. The Spanish were the first Europeans to see the bouncing rubber balls (although solid and not inflated) which were employed most notably in the Mesoamerican ballgame. Balls used in various sports in other parts of the world prior to Columbus were made from other materials such as animal bladders or skins, stuffed with various materials. As balls are o ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Optical Toys
Optical toys form a group of devices with some entertainment value combined with a scientific, optical nature. Many of these were also known as "philosophical toys" when they were developed in the 19th century. People must have experimented with optical phenomena since prehistoric times and played with objects that influenced the experience of light, color and shadow. In the 16th century some experimental optical entertainment - for instance camera obscura demonstrations - were part of the cabinets of curiosities that emerged at royal courts. Since the 17th century optical tabletop instruments such as the compound microscope and telescope were used for parlour entertainment in richer households . Other, larger devices - such as peep shows - were usually exhibited by travelling showmen at fairs. The phenakistiscope, zoetrope, praxinoscope and flip book a.o. are often seen as precursors of film, leading to the invention of cinema Cinema may refer to: Film * Cinematography, the a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
American Inventions ...
The following articles cover the timeline of United States inventions: *Timeline of United States inventions (before 1890), before the turn of the century * Timeline of United States inventions (1890–1945), before World War II *Timeline of United States inventions (1946–1991), for the post-war era *Timeline of United States inventions (after 1991), after the Fall of the Soviet Union {{DEFAULTSORT:Timeline of United States Inventions United States inventions United States The United States of America (U.S.A. or USA), commonly known as the United States (U.S. or US) or America, is a country primarily located in North America. It consists of 50 states, a federal district, five major unincorporated territorie ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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