Recent content by leukoplast

Since I started this conversation with you, I have done tons of searching and research on the subject to try to make my information as accurate as possible to prove, or at least reinforce, my case. However once you posted about how you can use the suns light to create a focused dot as your...

You are missing the point here, sure there may be some way to make a nice "dot" from an incoherent light source by using different methods and experiments. However with MY experiment and the same piece of equipment, a magnifying glass, an incoherent light source doesn't focus down to a dot...

Sorry to break this to you, but the suns rays are completely parallel once they reach earth. Same goes for star light (due to how far away they are). And no, you cannot focus any light source to a neat dot with a magnifying glass. Go ahead, try it with a light bulb or LED flashlight, all you...

Well I certainly am no expert on coherence, so I cannot say with absolute certainty that diffuse laser light is coherent or not. I personally believe it is, because at what point do you draw the line of grainy or matte? Does the light all of a sudden become coherent again once it has just the...

I'm pretty sure laser light is always coherent, regardless if it is bouncing off something or not. Like when you shine a laser in a room and the reflected light on the walls looks grainy, that is the effect of coherent light. Which is why reflections are so bad. Think about it, say you shine a...

That is certainly interesting, and you have had your eyes checked and confirmed there was no damage done? The thing that gets me is what the class 4/IV rating indicates: And the older system: Both make it clear that even diffuse reflections can cause eye damage. The thing is, class 4...

I actually did measure the sun way back in the day when I got my lasercheck, and from what I remember it registered a few milliwatts... I think. It's dark now so I can't check but maybe I will during the day just for the heck of it. But the thing is the lasercheck needs to be set for a...

Didn't want a start a new thread, and tried searching to no avail, so I'll just ask it in this thread as it seems relevant and not too old. I am curious how bad it is to view the dot on a diffuse surface and what distance would yield no eye damage (talking about 1+ watt 445nm here). One...

Ah ok, nicely done! :beer: BTW, at 300mA your pen is likely outputting in the range of 60-80mW. If you are using a coated glass lens, possibly a little more. But these diodes are not very efficient when being driven with such a low current (compared to what they can handle). My pen is...

These diodes are horribly inefficient at lower powers. Which is why it takes about 300mA to get 65mW. Jay and Dave have driven the diodes at 275mA and have gotten powers between 50-75mW depending on their setup (lenses and whatnot). Bottom line is, these diodes were not made for lower mW...

Re: Rnd 2 Host+Heatsink $20 Shipped Well, I received my silver host from the first round today. Got to say, not too bad of a host! :gj: Things do rattle around a bit inside (the AAA battery case for example), but it's far from any kind of issue and can easily be fixed. The heatsink is very...

What kind of duty cycle do these have? Cause I have a ~300mA pen that is at 65mW and it warms up quite quick in a pen host.

Beautiful host/build you have there! :gj: If I may ask, where on earth did you manage to get a blue pen like that? Did you have a standard leadlight custom painted?

Thanks for that in-depth info Bionic! :yh: Sounds like one heck of a interesting experience to me, one of these days I may have to check it out. I love techno/electronic music so I bet I would enjoy it. I remember reading internet articles years ago about techno artists having shows there, or...

So whats the deal with burning man anyway? In my mind I always envisioned it as being some kind of hippie love-fest where everybody is high, hallucinating and doped out of their minds the whole time. How 'commercialized' is it? And it is like a week or two long? Whats the draw of going to...