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Video Camera Tube
Video camera tubes are devices based on the cathode-ray tube that were used in television cameras to capture television images, prior to the introduction of charge-coupled device (CCD) image sensors in the 1980s. Several different types of tubes were in use from the early 1930s, and as late as the 1990s. In these tubes, an cathode ray, electron beam is scanned across an image of the scene to be broadcast focused on a target. This generated a current that is dependent on the brightness of the image on the target at the scan point. The size of the striking ray is tiny compared to the size of the target, allowing 480–486 horizontal scan lines per image in the NTSC format, 576 lines in PAL, and as many as 1035 lines in Multiple sub-Nyquist sampling encoding, Hi-Vision. Cathode-ray tube Any vacuum tube which operates using a focused beam of electrons, originally called cathode rays, is known as a cathode-ray tube (CRT). These are usually seen as display devices as used in older (i. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hugo Gernsback
Hugo Gernsback (; born Hugo Gernsbacher, August 16, 1884 – August 19, 1967) was a Luxembourgish American editor and magazine publisher whose publications included the first science fiction magazine, ''Amazing Stories''. His contributions to the genre as publisher were so significant that, along with the novelists Jules Verne and H. G. Wells, he is sometimes called "The Father of Science Fiction". In his honor, annual awards presented at the World Science Fiction Convention are named the "Hugo Award, Hugos". Gernsback emigrated to the U.S. in 1904 and later became a citizen. He was also a significant figure in the electronics and radio industries, even starting a radio station, WRNY, and the world's first magazine about electronics and radio, ''Modern Electrics''. Gernsback died in New York City in 1967. Personal life Gernsback was born in 1884 in Luxembourg City, to Berta (Dürlacher), a housewife, and Moritz Gernsbacher, a winemaker. His family was Jewish. Gernsback emigr ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Time (magazine)
''Time'' (stylized in all caps as ''TIME'') is an American news magazine based in New York City. It was published Weekly newspaper, weekly for nearly a century. Starting in March 2020, it transitioned to every other week. It was first published in New York City on March 3, 1923, and for many years it was run by its influential co-founder, Henry Luce. A European edition (''Time Europe'', formerly known as ''Time Atlantic'') is published in London and also covers the Middle East, Africa, and, since 2003, Latin America. An Asian edition (''Time Asia'') is based in Hong Kong. The South Pacific edition, which covers Australia, New Zealand, and the Pacific Islands, is based in Sydney. Since 2018, ''Time'' has been owned by Salesforce founder Marc Benioff, who acquired it from Meredith Corporation. Benioff currently publishes the magazine through the company Time USA, LLC. History 20th century ''Time'' has been based in New York City since its first issue published on March 3, 1923 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Philo T
Philo of Alexandria (; ; ; ), also called , was a Hellenistic Jewish philosopher who lived in Alexandria, in the Roman province of Egypt. The only event in Philo's life that can be decisively dated is his representation of the Alexandrian Jews in a delegation to the Roman emperor Caligula in 40 CE following civil strife between the Jewish and Greek communities of Alexandria. Philo was a leading writer of the Hellenistic Jewish community in Alexandria, Egypt. He wrote expansively in Koine Greek on philosophy, politics, and religion in his time; specifically, he explored the connections between Greek Platonic philosophy and late Second Temple Judaism. For example, he maintained that the Greek-language Septuagint and the Jewish law still being developed by the rabbis of the period together serve as a blueprint for the pursuit of individual enlightenment. Philo's deployment of allegory to harmonize Jewish scripture, mainly the Torah, with Greek philosophy was the first documente ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Philo Farnsworth
Philo Taylor Farnsworth (August 19, 1906 – March 11, 1971), "The father of television", was the American inventor and pioneer who was granted the first patent for the television by the United States Government. Burns, R. W. (1998), ''Television: An international history of the formative years''. IET History of Technology Series, 22. LondonThe Institution of Engineering and Technology (IET) p. 370. . He also invented a video camera tube, and the image dissector. He commercially produced and sold a fully functioning television system, complete with receiver and camera—which he produced commercially through the Farnsworth Television and Radio Corporation from 1938 to 1951, in Fort Wayne, Indiana. In later life, Farnsworth invented a small nuclear fusion device, the Farnsworth Fusor, employing inertial electrostatic confinement (IEC). Like many fusion devices, it was not a practical device for generating nuclear power, although it provides a viable source of neutrons. The desi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Magnetic Focusing In Typical Camera Tubes
Magnetism is the class of physical attributes that occur through a magnetic field, which allows objects to attract or repel each other. Because both electric currents and magnetic moments of elementary particles give rise to a magnetic field, magnetism is one of two aspects of electromagnetism. The most familiar effects occur in ferromagnetic materials, which are strongly attracted by magnetic fields and can be magnetized to become permanent magnets, producing magnetic fields themselves. Demagnetizing a magnet is also possible. Only a few substances are ferromagnetic; the most common ones are iron, cobalt, nickel, and their alloys. All substances exhibit some type of magnetism. Magnetic materials are classified according to their bulk susceptibility. Ferromagnetism is responsible for most of the effects of magnetism encountered in everyday life, but there are actually several types of magnetism. Paramagnetic substances, such as aluminium and oxygen, are weakly attracted to an ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Rudolf Hell
Rudolf Hell (19 December 1901 – 11 March 2002) was a German inventor and engineer. Career Hell was born in Eggmühl. From 1919 to 1923, he studied electrical engineering in Munich. He worked there from 1923 to 1929 as assistant of Prof. Max Dieckmann, with whom he operated a television station at the ''Verkehrsausstellung'' (lit.: "traffic exhibition") in Munich in 1925. In the same year Hell invented an apparatus called the '' Hellschreiber'', an early forerunner to impact dot matrix printers and faxes. Hell received a patent for the Hellschreiber in 1929. In the year 1929 he founded his own company in Babelsberg. After World War II he re-founded his company in Kiel. He kept on working as an engineer and invented machines for electronically controlled engraving of printing plates and an electronic photo typesetting system called ''digiset'' marketed in the US as ''VideoComp'' by RCA and later by III. He has received numerous awards such as the Knight Commander's Cro ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Max Dieckmann
Max or MAX may refer to: Animals * Max (American dog) (1983–2013), at one time purported to be the world's oldest living dog * Max (British dog), the first pet dog to win the PDSA Order of Merit (animal equivalent of the OBE) * Max (gorilla) (1971–2004), a western lowland gorilla at the Johannesburg Zoo who was shot by a criminal in 1997 Brands and enterprises * Australian Max Beer * Max Hamburgers, a fast-food corporation * MAX Index, a Hungarian domestic government bond index * Max Fashion, an Indian clothing brand Computing * MAX (operating system), a Spanish-language Linux version * Max (software), a music programming language * MAX Machine * Multimedia Acceleration eXtensions, extensions for HP PA-RISC Films * ''Max'' (1994 film), a Canadian film by Charles Wilkinson * ''Max'' (2002 film), a film about Adolf Hitler * ''Max'' (2015 film), an American war drama film * ''Max'' (2024 film), an Indian Kannada language film by Vijay Karthikeyaa Games * '' Dancing St ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Anode
An anode usually is an electrode of a polarized electrical device through which conventional current enters the device. This contrasts with a cathode, which is usually an electrode of the device through which conventional current leaves the device. A common mnemonic is ACID, for "anode current into device". The direction of conventional current (the flow of positive charges) in a circuit is opposite to the direction of electron flow, so (negatively charged) electrons flow from the anode of a galvanic cell, into an outside or external circuit connected to the cell. For example, the end of a household battery marked with a "+" is the cathode (while discharging). In both a galvanic cell and an electrolytic cell, the anode is the electrode at which the oxidation reaction occurs. In a galvanic cell the anode is the wire or plate having excess negative charge as a result of the oxidation reaction. In an electrolytic cell, the anode is the wire or plate upon which excess positive charge ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Photocathode
A photocathode is a surface engineered to convert light (photons) into electrons using the photoelectric effect. Photocathodes are important in accelerator physics where they are utilised in a photoinjector to generate high brightness electron beams. Electron beams generated with photocathodes are commonly used for free electron lasers and for ultrafast electron diffraction. Photocathodes are also commonly used as the negatively charged electrode in a light detection device such as a photomultiplier, phototube and image intensifier. Important Properties Quantum Efficiency (QE) Quantum efficiency is a unitless number that measures the sensitivity of the photocathode to light. It is the ratio of the number of electrons emitted to the number of incident photons. Rao, T., & Dowell, D. H. (2013). ''An engineering guide to photoinjectors''. CreateSpace Independent Publishing. This property depends on the wavelength of light being used to illuminate the photocathode. For man ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Farnsworth Image Dissector Tube 1931
Farnsworth may refer to: Places * Farnsworth, Indiana, a ghost town * Farnsworth, Texas, an unincorporated community in the Texas Panhandle *Farnsworth Peak, a mountain located west of Salt Lake City, Utah People * Farnsworth (surname), a list of people and fictional characters * Farnsworth Donald (1952), American artist, inventor, papermaker * Farnsworth Wright (1888–1940), editor of the pulp magazine ''Weird Tales'' Other uses * Farnsworth Art Museum, Rockland, Maine * Farnsworth House (other), various places * Farnsworth Lantern Test, used to screen for color blindness *Farnsworth Middle School, Guilderland Central School District, Guilderland, New York * Farnsworth Metropark, near Toledo, Ohio *Farnsworth method of learning Morse code Morse code is a telecommunications method which Character encoding, encodes Written language, text characters as standardized sequences of two different signal durations, called ''dots'' and ''dashes'', or ''dits'' and ''dahs'' ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
France
France, officially the French Republic, is a country located primarily in Western Europe. Overseas France, Its overseas regions and territories include French Guiana in South America, Saint Pierre and Miquelon in the Atlantic Ocean#North Atlantic, North Atlantic, the French West Indies, and List of islands of France, many islands in Oceania and the Indian Ocean, giving it Exclusive economic zone of France, one of the largest discontiguous exclusive economic zones in the world. Metropolitan France shares borders with Belgium and Luxembourg to the north; Germany to the northeast; Switzerland to the east; Italy and Monaco to the southeast; Andorra and Spain to the south; and a maritime border with the United Kingdom to the northwest. Its metropolitan area extends from the Rhine to the Atlantic Ocean and from the Mediterranean Sea to the English Channel and the North Sea. Its Regions of France, eighteen integral regions—five of which are overseas—span a combined area of and hav ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
