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From: David J Taylor on 13 Aug 2010 02:54 "Kennedy McEwen" <rkm(a)nospam.demon.co.uk> wrote in message news:wsAzJECmeCZMFwmG(a)kennedym.demon.co.uk... [] > See this before letting anyone "play" with your cheap green laser > pointer. > > http://www.nist.gov/customcf/get_pdf.cfm?pub_id=906138 [] > The document link above explains some simple tests to at least check the > 808nm output from a GLP using a CD-ROM and a webcam. > -- > Kennedy As someone who used to work with NdYAG lasers at 1064nm, with outputs measured in mega-joules rather than milli-watts, I recall how seriously the chance of eye damage was taken. Thanks for the pointer to that document - interesting as a description of how the devices work as well as for the warning it provides. Cheers, David
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