IR mirror with Crow IR beam

i have used photobeams 65 feet xmiter to mirror then 65 feet back to reciever.. but you gota have the thing spot on or it won't work. I used a Q-beam spot light to align the mirror.. black out the room as best you can, then place the Q-beam aiming for the mirror, then adjust the mirror to put a spot where you want the receiver to go. then lock the mirror down, go to the spot and mark it for the receiver.. then mount the transmitter and receiver and adjust the light and photocell toward the mirror.. usually it works first time for me..

Thanks. What did you use for a mirror? Normal back-coated piece of glass? Other than the high-end specialty equipment, I can't find an affordable IR mirror for sale on the net. I think Edmund Scientific used to sell front-coated mirrors for laser projects. Are they still in business?

Best, Christopher

the mirror was an old style photo beam rig that ADT had been using.. not sure of the manufacturer (DS maybe or Arrowhead) but it was 6 inches in oval shape with a 3 way locking adjustment axis.. looked like a standard glass mirror, but was glued into a metal solid back frame.

On Feb 25, 9:14=EF=BF=BDpm, "Christopher Glaeser" wrote= :

ed piece of glass?

Although a regular mirror cuts down considerably on the distance .... you can use them.

If the Photo beam comes in a "long distance" model, get that one to compensate.

Years ( and years and years) ago. we'd sometimes use two or three mirrors. Back then it took a long time to set them up and they were always being knocked out of alignment. Back then they used 12 volt automobile light bulbs as the light source. I think it was the Ademco