A device for projecting and enlarging slides (transparencies). A low-voltage bulb is used as the light source, and slides of the subject are fed in one by one, or in succession, for projection. There are a variety of types, from very simple ones to those with automatic frame-feeding and automatic focusing devices, and simple viewers that use transmitted light for viewing. Some can be linked to a tape recorder to synchronize with sound recording. 35 mm slide projectors became popular, but have now almost disappeared. Source: Encyclopaedia Britannica Concise Encyclopedia About Encyclopaedia Britannica Concise Encyclopedia Information |
スライド(透明陽画)を投影拡大して鑑賞する器具。光源には低電圧電球を用い,映写対象物を撮影したスライドを 1枚ずつ,または連続して送り込んで映写する仕組みになっている。ごく簡単な構造のものから,自動コマ送り装置付き,自動焦点合わせ装置付きなど各種があり,また透過光で見る装置に簡易ビューアがある。録音と同調するためテープレコーダと連動できるものもある。35ミリ・スライド映写機が普及したが,今日ではほとんど姿を消した。
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