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翻訳と辞書　辞書検索 [ 開発暫定版 ] スポンサード リンク Air-gap flash ： ウィキペディア英語版 Air-gap flash An air-gap flash is a photographic light source capable of producing sub-microsecond light flashes, allowing for (ultra) high-speed photography. This is achieved by a high-voltage (20 kV typically) electric discharge between two electrodes over the surface of a quartz (or glass) tube. The distance between the electrodes is such that a spontaneous discharge does not occur. To start the discharge a high-voltage pulse is applied on an electrode inside the quartz tube. The discharge can be triggered electronically using a microphone or an interrupted laser beam in order to illuminate a fast event. A sub-microsecond flash is fast enough to photographically stop even a supersonic bullet in flight without noticeable motion blur. ==History== The person credited with popularising the flash is Harold Eugene Edgerton, though earlier scientists such as Ernst Mach also used a spark gap as a fast photographic lighting system. William Henry Fox Talbot is said to have created the first spark-based flash photo, using a Leyden jar, the original form of the capacitor. Edgerton was one of the founders of EG&G company who sold an air-gap flash under the name Microflash 549.〔http://people.rit.edu/andpph/text-microflash-549-manual.pdf〕 There are several commercial flashes available today. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Air-gap flash」の詳細全文を読む スポンサード リンク 翻訳と辞書 : 翻訳のためのインターネットリソース Copyright(C) kotoba.ne.jp 1997-2016. All Rights Reserved.