780nm CD burner current 320mA 1 x 14500

thanks for watching...:wave:

Pretty cool you actually put that into a pointer, i think very few people bother with the 780 nm diodes in dvd/cd writer drives. It seems to back a bit of punch at least.

Downside for me is that these things are borderline invisible but very dangerous to the eye.

Benm said:

Pretty cool you actually put that into a pointer, i think very few people bother with the 780 nm diodes in dvd/cd writer drives. It seems to back a bit of punch at least.

Downside for me is that these things are borderline invisible but very dangerous to the eye.

Click to expand...

yes, it is very dangerous to the eye because it is invisible. you should careful

It isn't invisible at all. I can see a 3mW dot just fine.

As i said: borderline invisible. You can easily see the output light of 780 or even 808 nm laser diodes when hitting a bit of paper or something like that.

The problem is that you cannot see the beam, but even more how deceivingly dim the dot appears to be. Even a full watt off 808 nm falling onto paper appears to be no brighter than a 1 mW 650 nm cat toy, althoygh the paper smoldering might be a bit of a giveaway there.

Another interesting aspect is that you will not -feel- the beam that much if you stick your finger in it. At the power density where 532nm would make your take your hand out right away, 780 nm is probably hardly possible to feel at all. This is mostly because these wavelengths easily penetrate skin and blood distrubuting the heat away by circulation.

So invisible: no. Eye problem when you do see the beam hitting your eye: yes.

That's true