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What size IR-Filter would fit the generic $10 laser

Anonymous0531

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Lasers like the laser 303 or 301.
 



Alaskan

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But then you would reduce the output power by ~15 or more percent! Just joking but curious why you want to filter it out.

You can buy these filters on ebay and cut one down to size with a glass cutter. Make a round one a square, or cut this one to size and glue it on over the output.

 

Anonymous0531

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But then you would reduce the output power by ~15 or more percent! Just joking but curious why you want to filter it out.

You can buy these filters on ebay and cut one down to size with a glass cutter. Make a round one a square, or cut this one to size and glue it on over the output.
My brother is very concerned about infrared leakage, that's all.
 

paul1598419

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That is silly. The IR content is 1064nm and basically follows the visible beam. It diverges a bit more quickly, but once that happens the 15 mW of IR is of no concern any longer. These lasers tend to peak ~80 mW, so 20% of that is usually the IR content. As it diverges it tends to make a cone shape which is far less power that can harm your retinas.
 

Alaskan

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I use those filters to see about how much of the output percentage is IR by measuring before and after inserting the filter, but not for any reason beyond that. I also have some filters which only let IR though to accomplish the same thing. The figure will not be completely accurate though as there are other losses involved.
 

paul1598419

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I also have some of these filters. They weren't at all expensive when I purchased them. I made a couple of builds incorporating them, but there was no visual difference I could ascertain. I still have a few left in my stock, but I haven't thought about using one in years now. Not even sure where to starting looking for them if I were to want one.
 




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