IR filters on cheap greenies

[james1095]

Has anyone ever measured the IR output of some of the cheap green pointers? I know the good ones have a high quality IR filter to block the substantial amounts of invisible IR but with prices dropping down into the $5 range I have to wonder if they might skimp on this. Ironically, safety glasses could make a green module more dangerous than without if they block much of the visible light leaving a lot of IR.

 

[udanis]

Generally speaking the cheaper greenies the cheaper ones do not have ir filters. The output of ir varies from laser to laser, but anyways.....Yes this is dangerous.

 

[cd520]

What IR filters on $5 pointers?? They do not come with any at all. IR contents seem to fluctuate wildy on greens with no filter.

Edit- it took me 3 minutes to type that LOL, damn football on tv . Udanis beat me to it.

 

[james1095]

Holy crap, you're right! I just aimed one through some safety glasses at the wall and could see no spot at all. Looked with my digital camera and there's a dot on the wall across the room! That's downright scary!