405nm beam visibility

HumanSymphony · Jul 25, 2008

haven't gotten my hands on one of these bad boys yet. currently waiting for all parts. what kind of beam visibility does say ~100mW of 405nm have? better than red? if any one has any realistic pics please post them

daguin · Jul 25, 2008

HumanSymphony said:
haven't gotten my hands on one of these bad boys yet. currently waiting for all parts. what kind of beam visibility does say ~100mW of 405nm have? better than red? if any one has any realistic pics please post them

Just peruse through the "blu-ray and violet lasers" board. Plenty of pics there. Also the experiments and modification board has some. Finally, the Buy/Sell/Trade board will have some pics.

Plenty to choose from . . . No waiting

Peace,
dave

john_lawson · Jul 25, 2008

if your say cooking in your house wow its really visable especially when yourv wife burns the meatloaf lol :-X

styropyro · Jul 25, 2008

In pitch black night violet is much more visible than red, but in most other circumstances red is brighter beam wise. I'd say 100mW of violet at night is light a <5mW green.

HumanSymphony · Jul 25, 2008

john_lawson said:
if your say cooking in your house wow its really visable especially when yourv wife burns the meatloaf lol :-X

exactly what i mean. a lot of them have smoke. i've never seen one in person so i don't know how it's supposed to look. that's why i need someone to tell me which ones are more realistic.

john_lawson · Jul 25, 2008

a bluray is really hard to see in the daytime about like a red laser so red and bluray to me are simular 100mw 405nm = 75-100 650nm my opinion not fact

Amnizu · Jul 27, 2008

My 140-150mW 6x blu-ray from Kenom is pretty visible under most lighting conditions, but there are also a lot of lighting conditions which will completely wash out the blu-ray and render it invisible to my eye.

nikokapo · Jul 27, 2008

HumanSymphony said:
[quote author=john_lawson link=1216944142/0#2 date=1216946829]if your say cooking in your house wow its really visable especially when yourv wife burns the meatloaf lol :-X

exactly what i mean. a lot of them have smoke. i've never seen one in person so i don't know how it's supposed to look. that's why i need someone to tell me which ones are more realistic.[/quote]

they're REALLY hard to see
though i believe it depends on who sees it. i see red better than violet at night. with 80mw of violet it's still almost invisible to me (pitch black environment).

Eagle_1 · Jul 28, 2008

I was driving my BR at 141ma through an aixiz acrylic lens (so large divergance) for 24 hrs before I CapZapped it (can I coin that term?). The night was cool and it had just finished raining, so there may not have been much humidity, but the beam was very clearly visible right up into the sky in a built up area with street lights, low cloud and nearly a full (but cloud obscured) moon. I could see the beam beautifully in the bathroom after leaving the hot shower tap on for a few minutes, but I certainly couldn't see it at all inside with moderate ambient lighting.

I blew the diode before I could see if it would perform better (from the perspective of beam visibility) with the slightly tighter beam the aixiz glass should produce. The result may be little different to the acrylic, the trade-off being the coating on the glass lens robbing some power.

I've got some new sleds and rckstr 200ma drivers on order. Should be nice

daguin · Jul 28, 2008

Eagle 1 said:
I've got some new sleds and rckstr 200ma drivers on order. Should be nice

At 200mA, be prepared to limit your duty cycle significantly (or be prepared to replace your diodes regularly)

Peace,
dave

Eagle_1 · Jul 28, 2008

I agree, Dave. Building a prototype Tyoe 1 Phaser and a Space: 1999 Stun Gun as hosts. Point and shoot duty cycle is all. I'll run the 141ma driver in the Laser Sabre when it arrives and see how long it lasts at that level.

daguin · Jul 28, 2008

Eagle 1 said:
I agree, Dave. Building a prototype Tyoe 1 Phaser and a Space: 1999 Stun Gun as hosts. Point and shoot duty cycle is all. I'll run the 141ma driver in the Laser Sabre when it arrives and see how long it lasts at that level.

That is a cool idea and should work well. Don't forget the pictures for the less creative among us

Peace,
dave

GooeyGus · Jul 28, 2008

You'll be able to see the beam at night. It's not super impressive but it sure looks neat.

Here's a completely unrealistic picture I snapped earlier in the fog of a 110mW 405nm laser. Argon not included.

Eagle_1 · Jul 28, 2008

Thanks, Dave - plenty of pics will be put posted once I'm closer. Found some left over carbon fibre and stainless steel to use for a build once the prototyping is done. In the meantime I've put an old 5mw red into the Art Asylum Phaser case just to have something to play with for the time being. I haven't even got a DMM onto it - just set it up with guesswork and the odd resistor I had running around. The red used to run off 4.5v, so, using its original driver I'm pumping 12v through a 330 ohm (could be 330k - I forget now - will test) resistor. Seems to work fine - very bright (low divergent beam) - I can easily eyeball (at night) the spot on the wall of a house over 1/4 mile away, but can't see the beam at all and it certainly doesn't burn (or even warm) my hand.

Sorry for the thread hijack, HumanSymphony!

GooeyGus · Jul 28, 2008

OH yeah I wanted to add that, from what I've seen, the aixiz glass lens doesn't give a significantly better beam over the acrylic. In fact, if we're talking divergence, there really shouldn't be a hugely significant difference between the two. In my humble opinion, I don't think using the glass lens is worth the power loss on a blu-ray diode.

Now, once we get the single element glass lenses from Igor, thats a different story

Eagle_1 · Jul 28, 2008

Yeah, I briefly screwed the glass lens in and there was no visible difference against the wall indoors, but I didn't get it outside to point it up into the universe to see if I could spot the difference using the eyeball MkI. I did have the back of the acrylic popped out though, which may have increased the divergence (just speculating here)...

EDIT: Definitely waiting for the Igor Iball

405nm beam visibility

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Eagle_1

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