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Document ID (ISN)104207
CIS number 05-438
ISBN(s) 3-86509-056-7
Year 2003
Convention or series no. Fb 1003
Author(s) Werhahn O., Schirmacher A., Schmiedel M., Sutter E., Nevejina-Sturhan A., Lecher H., Siegner U., Ott G., Janssen M.
Bundesanstalt für Arbeitsschutz und Arbeitsmedizin
Title Laser filters for the ns- and fs regime
Original title Laserschutzfilter für den ns- und fs-Bereich [in German]
Bibliographic information Wirtschaftsverlag NW, Postfach 10 11 10, 27511 Bremerhaven, Germany, 2003. 126p. Illus. 28 ref. Price: EUR 13.00.
Abstract Non-linear interactions between light and matter such as induced transmission can impair the protective effect of filters against laser radiation. When these filters are exposed to short high-energy laser impulses, this effect induces a transient increase in the degree of spectral transmission, causing eye irradiation in excess of admissible levels, possibly resulting in lesions. This study examines the behaviour of filters against laser rays when exposed to intensive laser impulses of duration in the nanosecond (ns) and femtosecond (fs) orders of magnitude. The induced transmission effect was also observed for very short impulses of the order of femtoseconds. The residual protective effects of these types of filters are reviewed. The influence of filter temperature on induced transmission is also discussed.
Descriptors (primary) radiation protection; filter glasses; lasers
Descriptors (secondary) light transmission factor; Germany; eye injuries; permissible radiation doses; irradiation
Document type E - Books, reports, proceedings
Country / State or ProvinceGermany
Subject(s) Radiation
Broad subject area(s) Physical hazards
Browse category(ies) Face and eye protection
Lasers
Ionizing radiation