Transparency (projection)
- Transparency (projection)
A transparency is a thin sheet of transparent flexible material, typically cellulose acetate, onto which figures can be drawn. These are then placed on an overhead projector for display to an audience. This system is still found in schools, but is being largely replaced by LCD projectors.
patial light modulators (SLMs)
Many overhead projectors are used with a flat panel LCD which, when used this way is referred to as a spatial light modulator or SLM. Data projectors are often based on some form of SLM in a projection path. An LCD is a transmissive SLM, whereas other technologies such as Texas Instrument's DLP are reflective SLMs. Not all projectors (e.g. some use devices that produce their own light) rather than function as transparencies. An example of non-SLM system are OLEDs.
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projection print — An enlarged or reduced photographic print made by projection of the image of a negative or a transparency onto a sensitized surface … Military dictionary
transparency — noun (plural cies) Date: 1591 1. something transparent; especially a picture (as on film) viewed by light shining through it or by projection 2. the quality or state of being transparent … New Collegiate Dictionary
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transparency — /trænsˈpɛərənsi / (say trans pairruhnsee), / ˈpær / (say par ) noun (plural transparencies) 1. Also, transparence. the property or quality of being transparent. 2. something which is transparent; a picture, design, etc., on glass or some… …
color transparency — noun : a color photograph to be examined by transmitted light * * * a positive color image photographically produced on transparent film or glass and viewed by transmitted light, usually by projection. [1910 15] * * * color transparency, a color… … Useful english dictionary
color transparency — a positive color image photographically produced on transparent film or glass and viewed by transmitted light, usually by projection. [1910 15] * * * … Universalium
photography, technology of — Introduction equipment, techniques, and processes used in the production of photographs. The most widely used photographic process is the black and white negative–positive system (Figure 1 >). In the camera the lens projects an image of… … Universalium
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