Hello,
I just purchased an inexpensive chinese RGB projector (from eBay). I will be using this projector in a home media room/DJ booth (20' x 20'). The power rating is 380mW total (R:300, G:50, B:30), TTL blanking.
Now I have a few questions about safety. I plan to have the projector mounted on a 9ft ceiling aimed horizontally. I would also like to have a set of many small mirrors on an opposite wall that will reflect the beam downward parallel to the wall, creating a laser "backdrop". I am assuming that at this power, it will be dangerous if someone were to get a direct beam into the eye, so I would like to make sure that the downward beam reflection is safe. How can I decide what mirrors would diffuse the beam enough to make it safe, I am thinking that if I use low quality (non-first surface) mirrors I can make the beams fairly safe. Any recommendations? maybe a lens or covering on the projector aperture?
Also, I want to make sure that If I program any beam shows that the projector cannot "accidentally" scan downwards. I was thinking of putting a blocking panel on the lower half of the projector to catch any beams below a certain angle.
One last thing, do I need to worry about the beams (reflected or not) burning carpet or walls (dark burgundy painted)?
Thanks!
JK