While it is technically possible to have a Class IIIb-capable component laser in a Class I 'system' the path there is not clear cut.
Besides the emitter's technical issues (AEL, exposure time, radiant power, wavelength, to name only a few) you have to take in consideration the failure modes of the laser driver circuitry - that Class I limits can be exceeded in event of failure, whether the system is a closed system (beam accessibility during service/normal use), the products installation location and acessbility to unauthorized personnel etc. Your best bet in classifying your 'system' is to look at ANSI Z136.1 and .2 specs. In my opinion (some may disagree) it's a good guide. John Juhasz Fiber Options Bohemia, NY -----Original Message----- From: Mark Schmidt [mailto:mschm...@xrite.com] Sent: Tuesday, March 05, 2002 2:17 PM To: emc-p...@majordomo.ieee.org Subject: Laser Safety I am trying to gain a better understanding of lasers and I have had some discussion and been told some things that don’t make much sense to me so I am asking the group for some guidance. Here is my question. If the unexpanded raw beam of a Class III b laser was incorporated into a larger system, is then expanded and used in this same system reducing the beam intensity to Class I levels. Would the overall system be classified as Class I ? Thanks. Mark Schmidt Regulatory Compliance X-Rite Incorporated U.S.A. (616) 257 2469 mschm...@xrite.com <mailto:mschm...@xrite.com> ------------------------------------------- This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. Visit our web site at: http://www.ewh.ieee.org/soc/emcs/pstc/ To cancel your subscription, send mail to: majord...@ieee.org with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Ron Pickard: emc-p...@hypercom.com Dave Heald: davehe...@mediaone.net For policy questions, send mail to: Richard Nute: ri...@ieee.org Jim Bacher: j.bac...@ieee.org All emc-pstc postings are archived and searchable on the web at: http://ieeepstc.mindcruiser.com/ Click on "browse" and then "emc-pstc mailing list" ------------------------------------------- This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. Visit our web site at: http://www.ewh.ieee.org/soc/emcs/pstc/ To cancel your subscription, send mail to: majord...@ieee.org with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Ron Pickard: emc-p...@hypercom.com Dave Heald: davehe...@mediaone.net For policy questions, send mail to: Richard Nute: ri...@ieee.org Jim Bacher: j.bac...@ieee.org All emc-pstc postings are archived and searchable on the web at: http://ieeepstc.mindcruiser.com/ Click on "browse" and then "emc-pstc mailing list"
