Trying to Find Class 1 Laser Diode

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I need to make a laser pointer for a profoundly disabled friend.  It
needs only to point 3 inches so I'm looking for a Class 1 laser diode
that will be safe for him despite his erratic movements.  Any help in
locating a Class 1 laser diode that would be appropriate would be
REALLY appreciated.



Re: Trying to Find Class 1 Laser Diode
Dmitri( had written this in response to

Patty wrote:

Quoted text here. Click to load it

I know I'm terribly late with an answer here but in case you're still
looking for a solution: you're probably not going to find a laser diode
with less than 1mW power. What I would do to eliminate any remote chance
of doing eye damage is to alter (de-focus) the optics of a smallest laser
pointer you can find to increase the beam spot size. Since you're only
concerned with the closest proximity, a beam spot of, say 1/4" diameter
may still be useful for pointing at close range but absolutely safe due to
its high divergence at the distance to the eye.

Otherwise you'll have to find a way to modulate the laser diode or just
use a bright LED instead of a laser diode. The latter seems an easier
solution for a hand-held pointer.

Best Regards,
Dmitri Abaimov, RCDD
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