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Image Projector
A projector or image projector is an optical device that projects an image (or moving images) onto a surface, commonly a projection screen. Most projectors create an image by shining a light through a small transparent lens, but some newer types of projectors can project the image directly, by using lasers. A virtual retinal display, or retinal projector, is a projector that projects an image directly on the retina instead of using an external projection screen. The most common type of projector used today is called a video projector. Video projectors are digital replacements for earlier types of projectors such as slide projectors and overhead projectors. These earlier types of projectors were mostly replaced with digital video projectors throughout the 1990s and early 2000s, but old analog projectors are still used at some places. The newest types of projectors are handheld projectors that use lasers or LEDs to project images. Movie theaters used a type of projector called a m ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
IFA 2012 IMG 5767
IFA or Ifa may refer to: Organisations Economics * Independent financial adviser, a type of financial services professional in the UK * Index Fund Advisors * Institute and Faculty of Actuaries, representing actuaries in the UK * Institute of Actuaries, in England, Wales and Northern Ireland * Faculty of Actuaries, in Scotland * Institute of Financial Accountants, representing accountants in the UK * International Fiscal Association * International Forfaiting Association Sports * Indian Football Association, West Bengal, India * Indoor Football Alliance * Intercollegiate Fencing Association * Intercollegiate Football Association, college football organization, 1873–1893 * International Fistball Association * Iraq Football Association * Irish Football Association, in Northern Ireland * Islamabad Football Association * Israel Football Association Other organizations * Illinois Family Action, the lobbying arm of the Illinois Family Institute in the US * India Foundation for the Ar ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Camera Obscura
A camera obscura (; ) is a darkened room with a aperture, small hole or lens at one side through which an image is 3D projection, projected onto a wall or table opposite the hole. ''Camera obscura'' can also refer to analogous constructions such as a box or tent in which an exterior image is projected inside. Camera obscuras with a lens in the opening have been used since the second half of the 16th century and became popular as aids for drawing and painting. The concept was developed further into the photographic camera in the first half of the 19th century, when camera obscura boxes were used to exposure (photography), expose photosensitivity, light-sensitive materials to the projected image. The camera obscura was used to study eclipses without the risk of damaging the eyes by looking directly into the sun. As a drawing aid, it allowed tracing the projected image to produce a highly accurate representation, and was especially appreciated as an easy way to achieve proper grap ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Shadow Play
Shadow play, also known as shadow puppetry, is an ancient form of storytelling and entertainment which uses flat articulated cut-out figures (shadow puppets) which are held between a source of light and a translucent screen or scrim. The cut-out shapes of the puppets sometimes include translucent color or other types of detailing. Various effects can be achieved by moving both the puppets and the light source. A talented puppeteer can make the figures appear to walk, dance, fight, nod and laugh. Shadow play is popular in various cultures, among both children and adults in many countries around the world. More than 20 countries are known to have shadow show troupes. Shadow play is an old tradition and it has a long history in Southeast Asia, especially in Indonesia, Malaysia, Thailand, and Cambodia. It has been an ancient art and a living folk tradition in China, India, Iran and Nepal. It is also known in Egypt, Turkey, Syria, Greece, Germany, France, and the United States. His ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
