P3D Laser target for camera rangefinder

[roberts@xxxxxxxxxxxxxxxxx (John W Roberts)]

>Date: Thu, 5 Nov 1998 19:58:38 -0700
>From: MarkKernes@xxxxxxx
>Subject: P3D Re:  PHOTO-3D digest 3057

>Well, actually, these tiny lasers are, at maximum, 5 mW. I used to own one
>back in the days I was making holograms, and have shined it in my eyes, though
>not for very long, with no ill effect. And I plan to shine the beam on an
>article of clothing, away from the face; that would cause no ill effects
>whatsoever.

Different lasers are rated by the power output for the kinds of safety
precautions recommended. For the higher power ones the warning is "do not
look into beam", while for lower power ones it may be "do not stare into beam"
(implying long exposure).

John R


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