|
Emil Von Höegh
Emil von Höegh (10 May 1865 – 29 January 1915) was an optical lens designer, known for inventing the first double anastigmatic camera lens A camera lens, photographic lens or photographic objective is an optical lens (optics), lens or assembly of lenses (compound lens) used in conjunction with a camera body and mechanism to Imaging, make images of objects either on photographic film ... called Dagor in 1892. In the same year, he began working for the German lens manufacturer Goerz, where he became the chief optical designer. At Goerz, he developed multiple lens designs, including the Höegh meniscus and Celor. He left the company in 1902. The mountain Mount Hoegh in Antarctica is named in his honour. References 1865 births 1915 deaths Instrument makers People from the German Empire {{design-bio-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Brackets
A bracket is either of two tall fore- or back-facing punctuation marks commonly used to isolate a segment of text or data from its surroundings. They come in four main pairs of shapes, as given in the box to the right, which also gives their names, that vary between British English, British and American English. "Brackets", without further qualification, are in British English the ... marks and in American English the ... marks. Other symbols are repurposed as brackets in specialist contexts, such as International Phonetic Alphabet#Brackets and transcription delimiters, those used by linguists. Brackets are typically deployed in symmetric pairs, and an individual bracket may be identified as a "left" or "right" bracket or, alternatively, an "opening bracket" or "closing bracket", respectively, depending on the Writing system#Directionality, directionality of the context. In casual writing and in technical fields such as computing or linguistic analysis of grammar, brackets ne ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lwówek Śląski
Lwówek Śląski (; formerly ''Lwów''; ) is a town in the Lower Silesian Voivodeship in Poland. Situated on the Bóbr River, Lwówek Śląski is about NNW of Jelenia Góra and has a population of about 9,000 inhabitants. It is the administrative seat of Lwówek Śląski County and of the municipality Gmina Lwówek Śląski. Founded in the 13th century, it was granted town rights in 1217, which became a model of municipal rights for a number of towns in southern Poland, including Cieszyn and Oświęcim, and from 1281 to 1286 it was a local Ducal seat of the Piast dynasty. Its prosperity came from the exploitation of gold and silver deposits, and after their depletion it was a center for cloth and linen making. Lwówek has also been a brewing center since the 13th century. Lwówek Śląski is called the Agate Capital of Poland, and hosts the annual Lwówek Agate Summer, the largest mineralogical event in Poland. History Middle Ages The vicinity of present-day Lwówek Śląski, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Kingdom Of Prussia
The Kingdom of Prussia (, ) was a German state that existed from 1701 to 1918.Marriott, J. A. R., and Charles Grant Robertson. ''The Evolution of Prussia, the Making of an Empire''. Rev. ed. Oxford: Clarendon Press, 1946. It played a significant role in the unification of Germany in 1871 and was a major constituent of the German Empire until its German Revolution of 1918–1919, dissolution in 1918. Although it took its name from the Prussia (region), region called Prussia, it was based in the Margraviate of Brandenburg. Its capital was Berlin. The list of monarchs of Prussia, kings of Prussia were from the House of Hohenzollern. The polity of Brandenburg-Prussia, predecessor of the kingdom, became a military power under Frederick William, Elector of Brandenburg, known as "The Great Elector". As a kingdom, Prussia continued its rise to power, especially during the reign of Frederick the Great, Frederick II "the Great".Horn, D. B. "The Youth of Frederick the Great 1712–30." ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Goslar
Goslar (; Eastphalian dialect, Eastphalian: ''Goslär'') is a historic town in Lower Saxony, Germany. It is the administrative centre of the Goslar (district), district of Goslar and is located on the northwestern wikt:slope, slopes of the Harz mountain range. The Old Town of Goslar with over 1.500 Timber framing, timber houses and the Mines of Rammelsberg are UNESCO World Heritage Sites for their millennium-long testimony to the history of ore mining and their political importance for the Holy Roman Empire and Hanseatic League. Each year Goslar awards the Goslarer Kaiserring, Kaiserring to an international artist, called the "Nobel Prize" of the art world. Geography Goslar is situated in the middle of the upper half of Germany, about south of Braunschweig, Brunswick and about southeast of the state capital, Hannover, Hanover. The Schalke (Harz), Schalke mountain is the highest elevation within the municipal boundaries at . The lowest point of is near the Oker river. Geograph ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Optical Lens Design
Optical lens design is the process of designing a lens to meet a set of performance requirements and constraints, including cost and manufacturing limitations. Parameters include surface profile types ( spherical, aspheric, holographic, diffractive, etc.), as well as radius of curvature, distance to the next surface, material type and optionally tilt and decenter. The process is computationally intensive, using ray tracing or other techniques to model how the lens affects light that passes through it. Design requirements Performance requirements can include: # Optical performance (image quality): This is quantified by various metrics, including encircled energy, modulation transfer function, Strehl ratio, ghost reflection control, and pupil performance (size, location and aberration control); the choice of the image quality metric is application specific. #Physical requirements such as weight, static volume, dynamic volume, center of gravity and overall configuration req ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Celor Lens
A Celor lens (also known as a symmetric dialyte) is a highly corrected lens A lens is a transmissive optical device that 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'') ... of the Dialyt type, designed for process photography, involving reproduction at or near 1:1 scale. Design It was developed in 1898 by Emil von Hoegh, as a development of his earlier ''Dagor'' lens (1892) designed for the German company Goerz. It was originally named the ''Double Anastigmat Goerz agorType B'', sold in both and versions; in 1904, the faster version was renamed to the ''Celor'' and the version was renamed to the ''Syntor''. Similar four-element air-spaced symmetric dialyte lenses were released by Steinheil (''Unofocal'', 1901), Kodak, and Taylor, Taylor & Hobson (''Aviar'', 1917). References Photographic lenses {{optics-s ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Anastigmat
An anastigmat or anastigmatic lens is a photographic lens completely corrected for the three main optical aberrations: spherical aberration, coma (optics), coma, and Astigmatism (optical systems), astigmatism. Early lenses often included the word ''Anastigmat'' in their name to advertise this new feature (''Doppel-Anastigmat'', ''Voigtländer Anastigmat Skopar'', etc.). History Early designs The first ''Anastigmat'' was designed by Paul Rudolph (physicist), Paul Rudolph for the German firm Carl Zeiss AG in 1890 and marketed as the ''Protar''; it consisted of four elements in two groups, as an asymmetric arrangement of two cemented achromatic lens doublets and was improved to a five-element, two-group design in 1891, substituting a cemented triplet for the rear group. In 1892, the Swiss mathematician Emil von Höegh designed the ''Dagor'' (aka ''Double Anastigmatic Goerz'') for Goerz (company), Goerz, a symmetric lens with six elements in two groups, made of two cemented triple ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Camera Lens
A camera lens, photographic lens or photographic objective is an optical lens (optics), lens or assembly of lenses (compound lens) used in conjunction with a camera body and mechanism to Imaging, make images of objects either on photographic film or on other media capable of storing an image Photosensitivity, chemically or Image sensor, electronically. There is no major difference in principle between a lens used for a still camera, a video camera, a telescope, a microscope, or other apparatus, but the details of design and construction are different. A lens might be permanently fixed to a camera, or it might be interchangeable lens camera, interchangeable with lenses of different focal lengths, apertures, and other properties. While in principle a simple lens, simple convex lens will suffice, in practice a compound lens made up of a number of optical lens elements is required to correct (as much as possible) the many optical aberrations that arise. Some aberrations will be prese ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Goerz (company)
C. P. Goerz was founded in 1886 by Carl Paul Goerz. Originally, it made geometrical drawing instruments for schools. From 1888 it made cameras and photographic lenses. During the World War I, First World War, Goerz's main production was for the German and Austrian military. Goerz is known primarily for Anschütz strut-folding cameras, Dagor and Tengor lenses, Tenax cameras (later continued by Zeiss Ikon) and Minicord subminiature cameras. C. P. Goerz also made a series of telescopic sights for sporting rifles that saw some use during the shortage of military sniping rifles experienced during the early stages of the trench warfare that was to characterise much of the First World War. In 1895 Goerz founded a branch in New York that was to become the C. P. Goerz American Optical Company in 1905. This company continued to operate independently in the USA until 1972. In 1908, Goerz Photochemisches Werk GmbH was founded in Zehlendorf, Berlin. This company produced roll film and film ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mount Hoegh
Andvord Bay () is a bay, long and wide, which lies between Beneden Head and Duthiers Point along the west coast of Graham Land, Antarctica. Location Andvord Bay is on the Danco Coast on the west side of the Antarctic Peninsula. It extands in a northwest direction from Forbidden Plateau. Laussedat Heights on the Arctowski Peninsula and Rongé Island are to the east of the bay, which opens onto the Gerlache Strait opposite Anvers Island. Lemaire Island and Paradise Harbour are to the southwest. Glaciers entering the bay, clockwise from the northeast, include Deville Glacier, Fliess Glacier (which enters Neko Harbour), Arago Glacier, Moser Glacier, Rudolph Glacier, Bagshawe Glacier and Grubb Glacier. Coastal features, clockwise from the northeast, include Beneden Head, Neko Harbour, Henryk Cove, Forbes Point, Lester Cove, Dallmeyer Peak, Almirante Ice Fringe, Steinheil Point, Mount Hoegh and Duthiers Point. Hydrography Andvord Bay is a glacial fjord. The mouth of Andvord Ba ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
