Antiglare device for welding protective masks
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United States of America Patent
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Sep 13, 2005
Grant Date -
May 12, 2005
app pub date -
Dec 18, 2001
filing date -
Dec 21, 2000
priority date (Note) -
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Abstract
A glare protection device for a welding protective mask includes an active electro-optical protective filter (2) and an electronic circuit (10). An UV-detector (UVD), which serves as an optical sensor, detects the welding light and, via an evaluation circuit (10.1), generates a signal (sin) for controlling of the protective filter (2). The signal corresponds to the detected UV intensity. The UV-detector includes a fluorescent layer (F) with an absorption in the UV range and an emission in the long-wave range corresponding to the spectral sensitivity of an assigned Si-photo detector (SD). This results in a simple and safe controlling of the protective filter, which is uninfluenced by the effects of extraneous light.
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