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List Of CRT Video Projectors
This is an incomplete list of front projection CRT video projector A CRT projector is a video projector that uses a small, high-brightness cathode ray tube (CRT) as the image generating element. The image is then focused and enlarged onto a screen using a lens kept in front of the CRT face. The first color CRT ...s. List of CRT projectors Re-badged projectors A number of projector manufacturers produced projectors that were sold under the brand of different makers, sometimes with minor electrical or cosmetic modification. The following list reflects these re-badged projectors. External links Curt Palme CRT P ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
CRT Video Projector
A CRT projector is a video projector that uses a small, high-brightness cathode ray tube (CRT) as the image generating element. The image is then focused and enlarged onto a screen using a lens kept in front of the CRT face. The first color CRT projectors came out in the early 1950s. Most modern CRT projectors are color and have three separate CRTs (instead of a single, color CRT), and their own lenses to achieve color images. The red, green and blue portions of the incoming video signal are processed and sent to the respective CRTs whose images are focused by their lenses to achieve the overall picture on the screen. Various designs have made it to production, including the "direct" CRT-lens design, and the Schmidt CRT, which employed a phosphor screen that illuminates a perforated spherical mirror, all within an evacuated cathode ray tube. The image in the Sinclair Microvision flat CRT is viewed from the same side of the phosphor struck by the electron beam. The other side ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Popular Science Monthly
''Popular Science'' (also known as ''PopSci'') is an American digital magazine carrying popular science content, which refers to articles for the general reader on science and technology subjects. ''Popular Science'' has won over 58 awards, including the American Society of Magazine Editors awards for its journalistic excellence in 2003 (for General Excellence), 2004 (for Best Magazine Section), and 2019 (for Single-Topic Issue). With roots beginning in 1872, ''Popular Science'' has been translated into over 30 languages and is distributed to at least 45 countries. Early history '' The Popular Science Monthly'', as the publication was originally called, was founded in May 1872 by Edward L. Youmans to disseminate scientific knowledge to the educated layman. Youmans had previously worked as an editor for the weekly ''Appleton's Journal'' and persuaded them to publish his new journal. Early issues were mostly reprints of English periodicals. The journal became an outlet for writin ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Betamax
Betamax (also known as Beta, as in its logo) is a consumer-level analog recording and cassette format of magnetic tape for video, commonly known as a video cassette recorder. It was developed by Sony and was released in Japan on May 10, 1975, followed by the US in November of the same year. Betamax is widely considered to be obsolete, having lost the videotape format war which saw its closest rival, VHS, dominate most markets. Despite this, Betamax recorders continued to be manufactured and sold until August 2002, when Sony announced that they were discontinuing production of all remaining Betamax models. Sony continued to sell Betamax cassettes until March 2016. Original version Launch and early models The first Betamax device introduced in the United States was the LV-1901 console, which included a color monitor, and appeared in stores in early November 1975. The cassettes contain videotape in a design similar to that of the earlier, professional , U-matic format. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sony HDVS
Sony HDVS is a range of high-definition video equipment developed in the 1980s to support an early analog high-definition television system (used in multiple sub-Nyquist sampling encoding (MUSE) broadcasts) thought to be the broadcast television systems that would be in use today. The line included professional video cameras, video monitors and linear video editing systems. History Sony first demonstrated a wideband analog video HDTV capable video camera, monitor and video tape recorder (VTR) in April 1981 at an international meeting of television engineers in Algiers, Algeria. The HDVS range was launched in April 1984, with the HDC-100 camera, which was the world's first commercially available HDTV camera and HDV-1000 video recorder, with its companion HDT-1000 processor/TBC, and HDS-1000 video switcher all working in the 1125-line component video format with interlaced video and a 5:3 aspect ratio. The helical scan VTR (the HDV-100) used magnetic tape similar to 1" type C vi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bell & Howell
Bell and Howell LLC is a U.S.-based services organization and former manufacturer of cameras, lenses, and motion picture machinery, founded in 1907 by two projectionists, and originally headquartered in Wheeling, Illinois. The company is now headquartered in Durham, North Carolina, and currently sells production mail equipment, buy-online-pickup-in-store (BOPIS) smart locker and kiosk solutions, and provides maintenance services for automated, industrial equipment in enterprise-level companies. Since 2010, the Bell + Howell brand name has been extensively licensed for a diverse range of consumer electronics products. History According to its charter, the Bell & Howell Company was incorporated on February 17, 1907. It was duly recorded in the Cook County Record Book eight days later. The first meeting of stockholders took place in the office of Attorney W. G. Strong on February 19 at 10 a.m. (10:00 CT). The first board of directors was chosen for a term of one year: Donald ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Harman Kardon
Harman Kardon (stylized as ) is a division of US-based Harman International Industries, a subsidiary of Samsung Electronics, and manufactures home and car audio equipment. Harman Kardon was originally founded in 1953 by business partners, Sidney Harman and Bernard Kardon. History In the early 1950s, Sidney Harman was the general manager of the David Bogen Company, a manufacturer of public address systems at the time. Bernard Kardon (January 8, 1914 – April 14, 1993 in New Rochelle) was the chief engineer at Bogen. Due to management changes at Bogen in the early 1950s, both men resigned. With $5,000 investment each, Sidney Harman and Bernard Kardon founded the Harman Kardon Company in 1953. In the 1950s Harman Kardon designed some of the first high fidelity audio products that initiated the modern consumer high fidelity business. The company's first product was an FM tuner. The integrated receivers (with a tuner, preamplifier and power amplifier) was an attempt to cre ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Line Doubler
A line doubler is a device or algorithm used to deinterlace video signals prior to display on a progressive scan display. The main function of a deinterlacer is to take an interlaced video frame which consists of 60 two-field interlaced fields of an NTSC analogue video signal or 50 fields of a PAL signal, and create a progressive scan output. Cathode ray tube (CRT) based displays (both direct-view and projection) are capable of directly displaying both interlaced and progressive video, and therefore the line-doubling process is an optional step to enhance picture quality. Other types of displays are fixed pixel displays, including LCD displays, plasma displays, DLP projectors, and OLED displays, are not scanned from top left to bottom right corners and generally cannot accept an interlaced signal ''directly'', and so require some kind of deinterlacing. Often, this is built in to the display and transparent to the user. Progressive scan DVD players also feature a deinterlacer. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Glycol
A diol is a chemical compound containing two hydroxyl groups ( groups). An aliphatic diol is also called a glycol. This pairing of functional groups is pervasive, and many subcategories have been identified. The most common industrial diol is ethylene glycol. Examples of diols in which the hydroxyl functional groups are more widely separated include 1,4-butanediol and propylene-1,3-diol, or beta propylene glycol, . Synthesis of classes of diols Geminal diols A geminal diol has two hydroxyl groups bonded to the same atom. These species arise by hydration of the carbonyl compounds. The hydration is usually unfavorable, but a notable exception is formaldehyde which, in water, exists in equilibrium with methanediol H2C(OH)2. Another example is (F3C)2C(OH)2, the hydrated form of hexafluoroacetone. Many gem-diols undergo further condensation to give dimeric and oligomeric derivatives. This reaction applies to glyoxal and related aldehydes. Vicinal diols In a vicinal diol, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
