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Proceedings Paper

Dynamic filters for protection devices
Author(s): E. Buhr
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Paper Abstract

Electro-optic filters with a transmittance variable in time are used for eye protection in electric welding applications. These filters change their luminous transmittance automatically from an initial maximum value to a minimum value when the welding arc is ignited. In the light state, the work-piece and thus the location where the electrode is to be set can be observed. After the ignition of the arc, within a certain switching time, the filter changes to its dark state in order to make the welding process visible.

Paper Details

Date Published: 10 January 1989
PDF: 21 pages
Proc. SPIE 10305, Dosimetry of Laser Radiation in Medicine and Biology, 103050G (10 January 1989); doi: 10.1117/12.2283597
Show Author Affiliations
E. Buhr, Physikalisch-Technische Bundesanstalt (Germany)

Published in SPIE Proceedings Vol. 10305:
Dosimetry of Laser Radiation in Medicine and Biology
Gerhard J. Mueller; David H. Sliney; Roy F. Potter, Editor(s)

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