Ads
related to: used opaque projectors for sale
Search results
Results From The WOW.Com Content Network
The opaque projector, or episcope is a device which displays opaque materials by shining a bright lamp onto the object from above. The episcope must be distinguished from the diascope , which is a projector used for projecting images of transparent objects (such as films), and from the epidiascope , which is capable of projecting images of both ...
The opaque projector, or episcope is a device which displays opaque materials by shining a bright lamp onto the object from above. The episcope must be distinguished from the diascope , which is a projector used for projecting images of transparent objects (such as films or slides), and from the epidiascope , which is capable of projecting ...
Because of its popularity, the Telop became a catch-all term for large-format slide projectors and opaque cards, even after the Gray Company stopped manufacturing Telop projectors. The term telop is used in Japan (テロップ, Teroppu) to indicate text superimposed on a screen, such as captions, subtitles, or scrolling tickers.
In the late 1950s and early 1960s, overhead projectors began to be widely used in schools and businesses. The first overhead projector was used for police identification work. [citation needed] It used a celluloid roll over a 9-inch stage allowing facial characteristics to be rolled across the stage. The United States military in 1940 was the ...
For classroom, businesses and houses of worship settings, 16:10 is the more commonly used projector screen aspect ratio because this matches the aspect ratio used by many modern computers. [ 5 ] Square-shaped screens used for overhead projectors sometimes double as projection screens for digital projectors in meeting rooms, where space is ...
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 use SLMs ...