Re: led & eye safety
From: Don Klipstein (don_at_manx.misty.com)
Date: 03/04/05
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Date: Fri, 4 Mar 2005 03:23:55 +0000 (UTC)
In article <38p531F5rmaddU1@individual.net>, R.Lewis wrote:
>EN60825-1 is a bit of a quagmire (to me anyway).
>
>For a class1 device I believe that no label is required to be fixed to the
>product but in the instructions and/or manual there should (must?) be a
>reference to it being class 1.
>
>Is this correct?
>
>Does this mean that, say, a simple torch (with a 1W incandescent lamp - way
>way below the limits of class1) needs to be referred to as class 1 in its
>instructions?
>What if there are no instructions?
>Must there be some just for somewhere to write class 1 ?
Many incandescent lamps exceed Class 1 (.4 microwatt in the
400-1500 nm band being able to enter a pupil 7 mm wide and be focused onto
a spot on the retina of angular size smaller than .0002 steradian will
exceed Class I if I correctly read and understand 21 CFR 1040.1)
In the USA, the regulation by the Center for Devices and Radiological
Health that defines these classes does not have regulatory force on light
sources other than lasers, including not on incandescent lamps nor LEDs
if I understand correctly. In addition, Class 1 does not require a label
even for lasers if I read and understood 21 CFR 1040.1 correctly.
- Don Klipstein (don@misty.com)
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