Vue D'optique

	Vue D'optique ''Vue d'optique'' (French), ''vue perspective'' or perspective view refers to a genre of etching popular during the second half of the 18th century and into the 19th. ''Vues d'optique'' were specifically developed to provide the illusion of depth when viewed through a zograscope, also known as an "optical diagonal machine" or viewers with similar functions. Characteristics Reversed type in some or all of the text, for viewing through a mirrored apparatus Bright hand-coloring Scenes chosen for their strong linear perspective Linear or point-projection perspective () is one of two types of graphical projection perspective in the graphic arts; the other is parallel projection. Linear perspective is an approximate representation, generally on a flat surface, of ... (for example, diagonal lines converging at a horizon) Subject matter appealing to armchair travelers: shipping, cities, palaces, gardens, architecture. History Optical viewers were generally popular with wel ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu]
picture info	Etching Etching is traditionally the process of using strong acid or mordant to cut into the unprotected parts of a metal surface to create a design in intaglio (incised) in the metal. In modern manufacturing, other chemicals may be used on other types of material. As a method of printmaking, it is, along with engraving, the most important technique for old master prints, and remains in wide use today. In a number of modern variants such as microfabrication etching and photochemical milling, it is a crucial technique in modern technology, including circuit boards. In traditional pure etching, a metal plate (usually of copper, zinc or steel) is covered with a waxy ground which is resistant to acid. The artist then scratches off the ground with a pointed etching needle where the artist wants a line to appear in the finished piece, exposing the bare metal. The échoppe, a tool with a slanted oval section, is also used for "swelling" lines. The plate is then dipped in a bath of aci ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu]
picture info	Zograscope A zograscope is an optical device for magnifying flat pictures that also has the property of enhancing the sense of the depth perception, depth shown in the picture. It consists of a large magnifying lens through which the picture is viewed. Devices containing only the lens are sometimes referred to as graphoscopes. Other models have the lens mounted on a stand in front of an angled mirror. This allows someone to sit at a table and to look through the lens at the picture flat on the table. Pictures viewed in this way need to be left-right reversed; this is obvious in the case of writing. A print made for this purpose, typically with extensive Perspective (graphical), graphical projection perspective, is called a ''vue d'optique'' or "perspective view". Zograscopes were popular during the later half of the 18th century as parlour entertainments. Most existing ones from that time are fine furniture, with turned stands, mouldings, brass fittings, and fine finishes. According to Mich ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu]
picture info	Perspective (graphical) Linear or point-projection perspective () is one of two types of graphical projection perspective in the graphic arts; the other is parallel projection. Linear perspective is an approximate representation, generally on a flat surface, of an image as it is seen by the eye. Perspective drawing is useful for representing a three-dimensional scene in a two-dimensional medium, like paper. It is based on the optical fact that for a person an object looks N times (linearly) smaller if it has been moved N times further from the eye than the original distance was. The most characteristic features of linear perspective are that objects appear smaller as their distance from the observer increases, and that they are subject to , meaning that an object's dimensions parallel to the line of sight appear shorter than its dimensions perpendicular to the line of sight. All objects will recede to points in the distance, usually along the horizon line, but also above and below the horiz ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu]