Well, In response to question 1, you may want to try for Class 1M. The new measurement geometries allow many class 3B lasers to be reclassified as 1M. I would assume (although I have no direct experience here) that the visible spectrum lasers would also benefit from the new geometries (BTW, the Class 1M spectrum is 302.5 to 4000nm). Wouldn't it be wonderful to have all Class 1(M) lasers?!!
Best Regards, Dave Heald -----Original Message----- From: Gandler, Mark [mailto:[email protected]] Sent: Tuesday, November 12, 2002 1:47 PM To: '[email protected]' Subject: Laser safety questions Hello Group, According to the new revision of IEC 60825-1 (2001-08) , there are following laser products classes: 1, 1M, 2, 2M , 3R , 3B and 4, instead of 1, 2 , 3A, 3B and 4 per previous revision. Question # 1 : should we change the labeling, let's say from 3A to 3R? Is it any timetable for implementation? The latest revision that I have for IEC 60825-2 is 2000-05 and classification there still 1,2,3A ,k 3A, 3B and 4. Question # 2 : is it any newer version of 60825-2 available? and if yes, what are the classes in it? Is it correct to assume that if somebody asking for laser power density , so I need to look for maximum permissible exposure (MPE)? If not , what it could be? If yes, what is the easiest (or only) way to calculate it? Let say the wavelength is 1550 nm, located on PCB , than after 10 mm or so is a connector, exposure is 100s. Any ideas? The MPE in the IEC table is 1000W/m2. Thank you in advance, Mark Gandler Ciena ------------------------------------------- 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: [email protected] with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Ron Pickard: [email protected] Dave Heald: [email protected] For policy questions, send mail to: Richard Nute: [email protected] Jim Bacher: [email protected] 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: [email protected] with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Ron Pickard: [email protected] Dave Heald: [email protected] For policy questions, send mail to: Richard Nute: [email protected] Jim Bacher: [email protected] 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"
