A welder's helmet
作者： Kjell Mases
DOI:
关键词: Filter effect 、 Welding 、 Filter (video) 、 Optics 、 Materials science
摘要: A welder's helmet (1) provided with a fast filter (3) which is controlled by welding light and through the wearer of can see clearly in absence light. In accordance invention, complemented side windows (4) operative to out IR UV radiation having moderate effect for visible
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