- 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 projectorfor display to an audience. This system is still found in schools, but is being largely replaced by LCD projectors.
patial light modulators (SLMs)
overhead projectors are used with a flat panel LCD which, when used this way is referred to as a spatial light modulatoror 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 DLPare 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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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… … Australian English dictionary
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