LEDs and eye safety
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Posted by R.Lewis on October 2, 2005, 7:11 pm
Please log in for more thread options **** Post for FREE via your newsreader at post.usenet.com **** How are white leds quantified with regard to eye safety standards? 60825 does not appear applicable as it stands - is there some other applicable standard? -=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-= *** Usenet.com - The #1 Usenet Newsgroup Service on The Planet! *** http://www.usenet.com Unlimited Download - 19 Seperate Servers - 90,000 groups - Uncensored -=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-= | ||||
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Posted by John Woodgate on October 2, 2005, 8:14 pm
Please log in for more thread options Sun, 2 Oct 2005: In what way is it not applicable? > - is there some other applicable standard?
No, 60825 is meant to be THE one, AFAIK. But there are many parts and amendments. If you go to the public part of the IEC web site, at: http://www.iec.ch/cgi-bin/procgi.pl/www/iecwww.p?wwwlang=e&wwwprog=TCpubs .p&progdb=db1&committee=TC&number=76 there is quite a bit of information available if you click on each standard number and read the resulting page. For some of the standards (but not IEC 60825-1 for some reason), there is an extensive preview available free of charge. I would have expected that the diffuse emission from the phosphor of a white LED would not be anywhere near as hazardous as the intense emission from a monochrome LED. -- Regards, John Woodgate, OOO - Own Opinions Only. If everything has been designed, a god designed evolution by natural selection. http://www.jmwa.demon.co.uk Also see http://www.isce.org.uk | ||||
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Posted by John Larkin on October 2, 2005, 12:34 pm
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On Sun, 2 Oct 2005 20:14:11 +0100, John Woodgate >Sun, 2 Oct 2005:
>>How are white leds quantified with regard to eye safety standards?
>>60825 does not appear applicable as it stands >
>In what way is it not applicable? > >> - is there some other applicable standard?
>
>No, 60825 is meant to be THE one, AFAIK. But there are many parts and >amendments. If you go to the public part of the IEC web site, at: > >http://www.iec.ch/cgi-bin/procgi.pl/www/iecwww.p?wwwlang=e&wwwprog=TCpubs >.p&progdb=db1&committee=TC&number=76 > >there is quite a bit of information available if you click on each >standard number and read the resulting page. For some of the standards >(but not IEC 60825-1 for some reason), there is an extensive preview >available free of charge. > >I would have expected that the diffuse emission from the phosphor of a >white LED would not be anywhere near as hazardous as the intense >emission from a monochrome LED. Are any visible-wavelength LEDs eye hazards? John | ||||
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Posted by John Fields on October 2, 2005, 3:48 pm
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On Sun, 02 Oct 2005 12:34:33 -0700, John Larkin >Are any visible-wavelength LEDs eye hazards?
--- Sure. I don't have a part number in front of me, but some of the LASER diodes must be. -- John Fields Professional Circuit Designer | ||||
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Posted by John Larkin on October 2, 2005, 4:56 pm
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On Sun, 02 Oct 2005 15:48:27 -0500, John Fields >On Sun, 02 Oct 2005 12:34:33 -0700, John Larkin
> > >>Are any visible-wavelength LEDs eye hazards?
>
>--- >Sure. > >I don't have a part number in front of me, but some of the LASER >diodes must be. Certainly. They have thousands (or is it millions?) of times the power density of LEDs. Incidentally, you *can* see an 850 nm VCSEL laser! John | ||||
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>60825 does not appear applicable as it stands