Re: 12 year old with a burning laser
Bjørn, Fri Apr 18 2008, 11:37PM

My first experiment would be to determine the IR output of the laser. It would be important for safety and for the reliability of later experiments.

Re: 12 year old with a burning laser
Tinfoil_Cat, Sun Apr 20 2008, 10:32PM

Now save up and buy some red goggles. Look after your eyes ;)

Re: 12 year old with a burning laser
Weston, Mon Apr 21 2008, 12:54AM

I have laser glasses. How can i find the IR output? The laser is from techlasers so it should have a IR filter. It is only 95 mw though.

Re: 12 year old with a burning laser
Myke, Mon Apr 21 2008, 01:04AM

Some digital cameras can detect near IR.
Is that what you are looking for?

Re: 12 year old with a burning laser
Bjørn, Mon Apr 21 2008, 01:49AM

You can make a blocking filter for visible light using exposed positive film so only the IR goes through, then you can try to detect the IR. I did it with a red laser pointer and it had a weak IR output. If the IR filter is not very good then it should be easy to detect since the IR laser is quite powerful. If it is very good you might need to take a long exposure photograph with a camera or possibly use a photofiode.

Cheaper cameras are better than expensive ones since they don't contain quality IR blocking filters. Cheap webcameras and the cheapest B/W video cameras are usually very sensitive to IR.

Re: 12 year old with a burning laser
Weston, Mon Apr 21 2008, 11:20PM

I did some testing using the laser glasses and my camera. I also found the IR filter. I should be fine.

Re: 12 year old with a burning laser
Jamil merali, Wed Oct 08 2008, 09:53PM

well you should go to
its recommended not to buy from tech lasers but nova lasers.