Welcome to Laser Pointer Forums - discuss green laser pointers, blue laser pointers, and all types of lasers



Laser Pointer Store

Cheap reflective strip?

d4j0n

New member
Joined
Apr 9, 2013
Messages
3
Points
0
I'm looking for a cheap material to use for a strip of laser reflective mirror.

The object of my design is to have two parallel mirror surfaces that will bounce a laser beam back and fourth. The beam "grid" will be around 5'x5' with beam spacings of 1". If you haven't already guessed, this is gonna be a sensor that will detect an object >1" wide moving through it. As long as the beam makes it to the end of the grid without excessive distortion it will be fine, a simple light sensor is on the other end.

I've tried mylar but it's terrible after the first reflection. I have a polished steel credit card case that works great but I'm lost on where to find a long strip of the material. I'm thinking of trying out some "mirror tapes" but I fear I'll run into distortion much like mylar.

http://www.ebay.com/itm/SuperBrite-Polyester-Chrome-Tape-choose-your-size-Near-Mirror-Finish-/380432899453?pt=LH_DefaultDomain_0&var=&hash=item5893915d7d
 
Last edited:

Things

New member
Joined
May 1, 2007
Messages
7,549
Points
0
Grab some old flatbed scanners, they have nice long, high quality first surface mirrors in them.

Image from another thread on this forum:

 
Last edited:

d4j0n

New member
Joined
Apr 9, 2013
Messages
3
Points
0
Unfortunately I would have to get a hold of quite a few for the ~20' total length I need (2 sensors 5'x5' each) :yabbem:
 

Bionic-Badger

Well-known member
Joined
Oct 26, 2007
Messages
5,478
Points
83
5ft x 5ft? Maybe mylar reflective film? It won't be like a flat mirror, but will be reflective. Otherwise, you should look into surplus mirrors or reflective acrylic sheets or something -- not especially cheap, but at those sizes it's about as good as it'll get.
 




Top