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首页> 外文期刊>Review of Scientific Instruments >Double‐Flash Microsecond Silhouette Photography
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Double‐Flash Microsecond Silhouette Photography

机译:双闪光灯微秒剪影摄影

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Equipment is described to take double‐exposure silhouette photographs of rapidly moving objects. Each exposure time is about ⅕ microsecond, and the time interval between flashes is adjustable. An eight‐inch square Ektalite Fresnel lens is used as a field lens to focus the light from the illuminating spark into the camera lens; it is especially useful for subjects where the lens is frequently damaged. Timing of the first spark is conveniently made for explosions by a photoelectric tube triggered by the light of the explosion. A double exposure photograph of a dynamite blasting cap is given as an example.
机译:设备被描述为对快速移动的物体进行两次曝光的轮廓照片。每个曝光时间约为1微秒,并且两次闪光之间的时间间隔是可调的。使用八英寸见方的方晶石菲涅耳透镜作为物镜,将来自照明火花的光聚焦到相机镜头中。它对于经常损坏镜头的拍摄对象特别有用。通过由爆炸光触发的光电管,可以方便地为爆炸准备第一火花的正时。以炸药炸药帽的二次曝光照片为例。

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