电弧焊(包括气体保护焊、等离子焊等)时,熔滴被强烈的弧光所掩盖,用一般的摄影方法很难获得清晰的熔滴过渡照片。为了解决这一问题,通常采用强背光的阴影摄影法。常用的背光源有碳弧、高压氙灯以及大功率聚光灯等。近年来,又发展了用激光作背光的摄影法。这种方法使用比较简 Arc welding (including gas shielded welding, plasma welding, etc.), the drop is covered by a strong arc, with the general photography method is difficult to obtain a clear droplet transition photo. In order to solve this problem, a strong backlighting method is usually used. Commonly used backlights are carbon arc, high pressure xenon lamps and high-power spotlights. In recent years, the development of a laser as a backlight photography. This method is simpler to use