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[en] By an up-dated international standard (IEC 60825-1 + Amendment 2) on laser safety some new laser classes are introduced. The new set of laser classes consists of 1, 1M, 2, 2M, 3R, 3B, and 4. This is a result of intense discussions in the committee and was laid down in 2000, slightly adjusted 2001. The previous classes 1, 2, 3A, 3B, and 4, established since more than 25 years, are partly abandoned. This paper compares the new classes to the old ones. (orig.)
Source
Paile, W. (ed.); Radiation and Nuclear Safety Authority, Helsinki (Finland); 521 p; ISBN 951-712-682-4; 
; ISBN 951-712-681-6; ; Jun 2003; p. 232-235; 13. ordinary meeting of the Nordic Society of Radiation Protection; Turku (Finland); 25-29 Aug 2002; Available in fulltext at URL: http://www.stuk.fi/julkaisut/stuk-a/stuk-a195.pdf or as a paper copy from Radiation and Nuclear Safety Authority (STUK), P.O.Box 14, FIN-00881 Helsinki, Finland
; ISBN 951-712-681-6; ; Jun 2003; p. 232-235; 13. ordinary meeting of the Nordic Society of Radiation Protection; Turku (Finland); 25-29 Aug 2002; Available in fulltext at URL: http://www.stuk.fi/julkaisut/stuk-a/stuk-a195.pdf or as a paper copy from Radiation and Nuclear Safety Authority (STUK), P.O.Box 14, FIN-00881 Helsinki, Finland