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Ernst Leitz
Ernst Leitz GmbH was a German corporation based in Wetzlar, a German centre for optics as well as an important location for the precision engineering industry, now divided into four independent companies: * Leica Camera, manufacturer of camera and sport optics equipment * Leica Geosystems, manufacturer of geodetic equipment * Leica Microsystems, manufacturer of microscopes and owner of the Leica brand * Leica Biosystems, a cancer diagnostics company History Carl Kellner, mechanic and self-taught mathematician, published his treatise ''Das orthoskopische Ocular, eine neu erfundene achromatische Linsencombination'' (''The orthoscopic ocular, a newly invented achromatic lens combination'') in 1849, describing a new optical formula he had developed. The ocular was capable of rendering an image with the correct perspective, free of the distortions typical of other microscopes at that time. Following his early death on 13 May 1855, his widow continued the business he had left behin ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Wetzlar
Wetzlar () is a city in the state of Hesse, Germany. It is the twelfth largest city in Hesse with currently 55,371 inhabitants at the beginning of 2019 (including second homes). As an important cultural, industrial and commercial center, the university town is one of the ten regional centers in the state of Hesse. A former free imperial city, it gained much of its fame as the seat of the Imperial Supreme Court (''Reichskammergericht'') of the Holy Roman Empire. Located 51 kilometers north of Frankfurt, at 8° 30′ E, 50° 34′ N, Wetzlar straddles the river Lahn and is on the German Timber-Frame Road, which passes mile upon mile of half-timbered houses. Historically, the city has acted as the hub of the Lahn-Dill-Kreis on the north edge of the Taunus. Tourists know the city for its ancient town and its medieval Catholic/Protestant shared cathedral of St. Mary. Notable architectural features include the Eisenmarkt and the steep gradients and tightly-packed street layout of a me ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Binocular Microscope , an optical device designed to enable binocular viewing through a single objective
{{Disambiguation ...
Binocular may refer to: Science and technology * Binocular vision, seeing with two eyes * Binoculars, a telescopic tool * Binocular microscope, binocular viewing of objects through a single objective lens Other uses * Binocular (horse), a thoroughbred race horse * Binocular (band), Kevin Rudolf's band that released a self-titled album in 2001 ** ''Binocular'' (album) See also * Binocular rivalry, a phenomenon of visual perception * Binoviewer A binoviewer is an optical device designed to enable binocular viewing through a single objective. In contrast to binoculars, it allows partially stereoscopic viewing and partially monoculair viewing, this because the eyes and brain still pro ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Binoculars
Binoculars or field glasses are two refracting telescopes mounted side-by-side and aligned to point in the same direction, allowing the viewer to use both eyes (binocular vision) when viewing distant objects. Most binoculars are sized to be held using both hands, although sizes vary widely from opera glasses to large pedestal-mounted military models. Unlike a (monocular) telescope, binoculars give users a three-dimensional image: each eyepiece presents a slightly different image to each of the viewer's eyes and the parallax allows the visual cortex to generate an impression of depth. Optical designs Galilean Almost from the invention of the telescope in the 17th century the advantages of mounting two of them side by side for binocular vision seems to have been explored. Most early binoculars used Galilean optics; that is, they used a convex objective and a concave eyepiece lens. The Galilean design has the advantage of presenting an erect image but has a narrow field of ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Trinovid
Trinovid is the protected model designation of a roof prism binoculars series from the company Leitz (optics) (since 1986 Leica Camera) based in Wetzlar Wetzlar () is a city in the state of Hesse, Germany. It is the twelfth largest city in Hesse with currently 55,371 inhabitants at the beginning of 2019 (including second homes). As an important cultural, industrial and commercial center, the un ..., a German centre for optics as well as an important location for the precision engineering industry. The Trinovid binoculars were introduced in 1958 based on a patent request filed in 1953 and featured: # special pentaprisms (so-called Uppendahl roof prism systems that allow the construction of compact optical instruments); # a built-in diopter adjustment, and # a fully internal focusing system, that moves internal optical lenses to prevent intrusion of dust and moisture into the binocular body with centrally located adjusting means to compensate for vision differences of the t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Opaque Projector
The opaque projector, epidioscope, epidiascope or episcope is a device which displays opaque materials by shining a bright lamp onto the object from above. A system of mirrors, prisms and/or imaging lenses is used to focus an image of the material onto a viewing screen. Because they must project the reflected light, opaque projectors require brighter bulbs and larger lenses than overhead projectors. Care must be taken that the materials are not damaged by the heat generated by the light source. Opaque projectors are not as common as the overhead projector. Opaque projectors are typically used to project images of book pages, drawings, mineral specimens, leaves, etc. They have been produced and marketed as artists’ enlargement tools to allow images to be transferred to surfaces such as prepared canvas, or for lectures and discourses. History Swiss mathematician, physicist, astronomer, logician and engineer Leonhard Euler demonstrated an opaque projector around 1756. It could p ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ostarbeiter
: ' (, "Eastern worker") was a Nazi German designation for foreign slave workers gathered from occupied Central and Eastern Europe to perform forced labor in Germany during World War II. The Germans started deporting civilians at the beginning of the war and began doing so at unprecedented levels following Operation Barbarossa in 1941. They apprehended ''Ostarbeiter'' from the newly-formed German districts of Reichskommissariat Ukraine, District of Galicia (itself attached to the General Government), and Reichskommissariat Ostland. These areas comprised German-occupied Poland and the conquered territories of the Soviet Union. According to Pavel Polian, over 50% of ''Ostarbeiters'' were formerly Soviet subjects originating from the territory of modern-day Ukraine, followed by Polish women workers (approaching 30% of the total). Eastern workers included ethnic Ukrainians, Poles, Belarusians, Russians, Armenians, Tatars, and others. Estimates of the number of ''Ostarbeiter'' range ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Max Berek
Max or MAX may refer to: Animals * Max (dog) (1983–2013), at one time purported to be the world's oldest living dog * Max (English Springer Spaniel), the first pet dog to win the PDSA Order of Merit (animal equivalent of 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 * Commodore 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 Games * '' Dancing Stage Max'', a 2005 game in the ''Dance Dance Revolution'' series * ''DDRM ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Fluorescent Microscope
A fluorescence microscope is an optical microscope that uses fluorescence instead of, or in addition to, scattering, reflection, and attenuation or absorption, to study the properties of organic or inorganic substances. "Fluorescence microscope" refers to any microscope that uses fluorescence to generate an image, whether it is a simple set up like an epifluorescence microscope or a more complicated design such as a confocal microscope, which uses optical sectioning to get better resolution of the fluorescence image. Principle The specimen is illuminated with light of a specific wavelength (or wavelengths) which is absorbed by the fluorophores, causing them to emit light of longer wavelengths (i.e., of a different color than the absorbed light). The illumination light is separated from the much weaker emitted fluorescence through the use of a spectral emission filter. Typical components of a fluorescence microscope are a light source (xenon arc lamp or mercury-vapor lamp are co ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Leipzig
Leipzig ( , ; Upper Saxon: ) is the most populous city in the German state of Saxony. Leipzig's population of 605,407 inhabitants (1.1 million in the larger urban zone) as of 2021 places the city as Germany's eighth most populous, as well as the second most populous city in the area of the former East Germany after (East) Berlin. Together with Halle (Saale), the city forms the polycentric Leipzig-Halle Conurbation. Between the two cities (in Schkeuditz) lies Leipzig/Halle Airport. Leipzig is located about southwest of Berlin, in the southernmost part of the North German Plain (known as Leipzig Bay), at the confluence of the White Elster River (progression: ) and two of its tributaries: the Pleiße and the Parthe. The name of the city and those of many of its boroughs are of Slavic origin. Leipzig has been a trade city since at least the time of the Holy Roman Empire. The city sits at the intersection of the Via Regia and the Via Imperii, two important medieval trad ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
35mm Format
135 film, more popularly referred to as 35 mm film or 35 mm, is a format of photographic film used for still photography. It is a film with a film gauge of loaded into a standardized type of magazine – also referred to as a cassette or cartridge – for use in 135 film cameras. The engineering standard for this film is controlled by ISO 1007 titled '135-size film and magazine'. The term 135 was introduced by Kodak in 1934 as a designation for 35 mm film specifically for still photography, perforated with Kodak Standard perforations. It quickly grew in popularity, surpassing 120 film by the late 1960s to become the most popular photographic film size. Despite competition from formats such as 828, 126, 110, and APS, it remains the most popular film size today. The size of the 135 film frame with its aspect ratio of 1:1.50 has been adopted by many high-end digital single-lens reflex and digital mirrorless cameras, commonly referred to as " full frame". Even ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Oskar Barnack
Oskar Barnack (Nuthe-Urstromtal, Brandenburg, 1 November 1879 – Bad Nauheim, Hesse, 16 January 1936) was a German inventor and photographer who built, in 1913, what would later become the first commercially successful 35mm still-camera, subsequently called Ur-Leica at Ernst Leitz Optische Werke (the Leitz factory) in Wetzlar. Life and career Barnack was an engineer at the Leitz company and suffered from asthma, so he proposed reducing the size and weight of cameras in order to be able to take photographs in his travels. In 1924 the camera was named Leica, an acronym obtained from Leitz Camera. It was released at the Leipzig Fair in 1925. Between 1913 and 1914, Barnack adapted 35 mm cinematic film for still-camera use with a larger negative than other 35mm cameras. The pronged-film rollers holding the perforated film allowed more precision than typical paper-backed roll film. His design was revolutionary because he transported the film horizontally, allowing an extended fr ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
