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Celor Lens
A Celor lens (also known as a symmetric dialyte) is a highly corrected lens of the Dialyt type, designed for process photography, involving reproduction at or near 1:1 scale. It was developed in 1898 by Emil von Hoegh, an optical designer working for the German company Goerz Rudolf Goerz (sometimes spelled Rudolph) (born 1879 and died 1935) was a German botanist. He was particularly interested in spermatophytes A spermatophyte (; ), also known as phanerogam (taxon Phanerogamae) or phaenogam (taxon Phaenogamae), is .... References Photographic lenses {{optics-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Photographic Lens
A camera lens (also known as photographic lens or photographic objective) is an optical lens or assembly of lenses used in conjunction with a camera body and mechanism to make images of objects either on photographic film or on other media capable of storing an image chemically or 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 with lenses of different focal lengths, apertures, and other properties. While in principle a 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 present in any lens system. It is the job of the lens designer to balance these and produce a desi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dialyt Lens
A dialyte lens (sometimes called a ''dialyt'') is a compound lens design that corrects optical aberrations where the lens elements are widely air-spaced. The design is used to save on the amount of glass used for specific elements or where elements can not be cemented because they have dissimilar curvatures. The word ''dialyte'' means "parted", "loose" or "separated". Dialyte telescopes The idea of widely separating the color correcting elements of a lens dates back to W. F. Hamilton's 1814 catadioptric Hamiltonian telescope and Alexander Rogers' 1828 proposals for a ''dialytic refractor''. The goal was to combine a large crown glass objective with a much smaller flint glass downstream to make an achromatic lens since flint glass at that time was very expensive. Dialyte designs were also used in the Schupmann medial telescope designed by in German optician Ludwig Schupmann near the end of the 19th century, in John Wall's 1999 "''Zerochromat''" retrofocally corrected dialytic ref ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Process Photography
Rear projection (background projection, process photography, etc.) is one of many in-camera effects cinematic techniques in film production for combining foreground performances with pre-filmed backgrounds. It was widely used for many years in driving scenes, or to show other forms of "distant" background motion. Technique Actors stand in front of a screen while a projector positioned behind the screen casts a reversed image of the background. This requires a large space, as the projector needs to be placed some distance from the back of the screen. Frequently the background image may initially appear faint and washed out compared to the foreground. The image that is projected can be still or moving, but is always called the ''plate.'' One might hear the command "Roll plate" to instruct stage crew to begin projecting. These so-called ''process shots'' were widely used to film actors as if they were inside a moving vehicle, who in reality are in a vehicle mock-up on a sound st ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Emil Von Hoegh
Emil or Emile may refer to: Literature *''Emile, or On Education'' (1762), a treatise on education by Jean-Jacques Rousseau * ''Émile'' (novel) (1827), an autobiographical novel based on Émile de Girardin's early life *''Emil and the Detectives'' (1929), a children's novel *"Emil", nickname of the Kurt Maschler Award for integrated text and illustration (1982–1999) *''Emil i Lönneberga'', a series of children's novels by Astrid Lindgren Military *Emil (tank), a Swedish tank developed in the 1950s * Sturer Emil, a German tank destroyer People *Emil (given name), including a list of people with the given name ''Emil'' or ''Emile'' *Aquila Emil (died 2011), Papua New Guinean rugby league footballer Other * ''Emile'' (film), a Canadian film made in 2003 by Carl Bessai *Emil (river), in China and Kazakhstan See also * * *Aemilius (other) *Emilio (other) *Emílio (other) *Emilios (other) Emilios, or Aimilios, (Greek: Αιμίλιος) is a ... [...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 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 for the movie ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Electromagnetic Theory Of Propagation, Interference And Diffraction Of Light
In physics, electromagnetism is an interaction that occurs between particles with electric charge. It is the second-strongest of the four fundamental interactions, after the strong force, and it is the dominant force in the interactions of atoms and molecules. Electromagnetism can be thought of as a combination of electricity and magnetism, two distinct but closely intertwined phenomena. In essence, electric forces occur between any two charged particles, causing an attraction between particles with opposite charges and repulsion between particles with the same charge, while magnetism is an interaction that occurs exclusively between ''moving'' charged particles. These two effects combine to create electromagnetic fields in the vicinity of charge particles, which can exert influence on other particles via the Lorentz force. At high energy, the weak force and electromagnetic force are unified as a single electroweak force. The electromagnetic force is responsible for many of t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
