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Panoramagram
The panoramagram is an instrument invented in 1824 and a method of stereoscopic viewing in which the left-eye and right-eye photographs are divided into narrow juxtaposed strips and viewed through a superimposed ruled or lenticular screen in such a way that each of the observer's eyes is able to see only the correct picture. Also used to obtain the illusion of depth of one or more objects placed on the horizon and reflected on a flat surface. References Sources * * * Further reading * * * * * Optical devices {{tool-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Viewing Instrument
A viewing instrument is a type of optical instrument that is used to assist viewing or visually examining an object or scenery Types * binoculars * contact lenses * cystoscope * electrotachyscope * endoscope * eyeglasses * fibrescope * finderscope * fluoroscope * gastroscope * gonioscope * kaleidoscope * kinetoscope * laryngoscope * magnifying glass * microscope * ophthalmoscope * otoscope * periscope * phenakistoscope also phenakistiscope * praxinoscope * Rotoscope * spectroscope * spotting scope * stereoscope * stroboscope * tachistoscope * telescope * teleidoscope * viewfinder In photography, a viewfinder is what the photographer looks through to compose, and, in many cases, to focus the picture. Most viewfinders are separate, and suffer parallax, while the single-lens reflex camera lets the viewfinder use the main ... {{div col end Optical instruments ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Three-dimensional Space
Three-dimensional space (also: 3D space, 3-space or, rarely, tri-dimensional space) is a geometric setting in which three values (called ''parameters'') are required to determine the position (geometry), position of an element (i.e., Point (mathematics), point). This is the informal meaning of the term dimension. In mathematics, a tuple of Real number, numbers can be understood as the Cartesian coordinates of a location in a -dimensional Euclidean space. The set of these -tuples is commonly denoted \R^n, and can be identified to the -dimensional Euclidean space. When , this space is called three-dimensional Euclidean space (or simply Euclidean space when the context is clear). It serves as a model of the physical universe (when relativity theory is not considered), in which all known matter exists. While this space remains the most compelling and useful way to model the world as it is experienced, it is only one example of a large variety of spaces in three dimensions called ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Horizon
The horizon is the apparent line that separates the surface of a celestial body from its sky when viewed from the perspective of an observer on or near the surface of the relevant body. This line divides all viewing directions based on whether it intersects the relevant body's surface or not. The ''true horizon'' is a theoretical line, which can only be observed to any degree of accuracy when it lies along a relatively smooth surface such as that of Earth's oceans. At many locations, this line is obscured by terrain, and on Earth it can also be obscured by life forms such as trees and/or human constructs such as buildings. The resulting intersection of such obstructions with the sky is called the ''visible horizon''. On Earth, when looking at a sea from a shore, the part of the sea closest to the horizon is called the offing. Pronounced, "Hor-I-zon". The true horizon surrounds the observer and it is typically assumed to be a circle, drawn on the surface of a perfectly spherica ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mirror Image
A mirror image (in a plane mirror) is a reflected duplication of an object that appears almost identical, but is reversed in the direction perpendicular to the mirror surface. As an optical effect it results from reflection off from substances such as a mirror or water. It is also a concept in geometry and can be used as a conceptualization process for 3-D structures. In geometry and geometrical optics In two dimensions In geometry, the mirror image of an object or two-dimensional figure is the virtual image formed by reflection in a plane mirror; it is of the same size as the original object, yet different, unless the object or figure has reflection symmetry (also known as a P-symmetry). Two-dimensional mirror images can be seen in the reflections of mirrors or other reflecting surfaces, or on a printed surface seen inside-out. If we first look at an object that is effectively two-dimensional (such as the writing on a card) and then turn the card to face a mirror, the obj ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Writing And Difference
''Writing and Difference'' (french: L'écriture et la différence) is a book by the French philosopher Jacques Derrida. The work, which collects some of the early lectures and essays that established his fame, was published in 1967 alongside ''Of Grammatology'' and ''Speech and Phenomena''. Summary Cogito and the History of Madness The collection contains the essay ''Cogito and the History of Madness'', a critique of Michel Foucault. It was first given as a lecture on March 4, 1963, at a conference at the '' Collège philosophique'', which Foucault attended, and caused a rift between the two,Powell (2006), pp. 34–5 possibly prompting Foucault to write ''The Order of Things'' (1966) and ''The Archaeology of Knowledge'' (1969).Carlo Ginzburg (1976), ''Il formaggio e i vermi'', translated in 1980 as The Cheese and the Worms: The Cosmos of a Sixteenth-Century Miller', trans. Anne Tedeschi (Baltimore: Johns Hopkins University Press), xviii. Violence and Metaphysics In "Violence a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
