Review: 510nm Direct Green Diodes / Build Photos (DGH-N1, DGH-N2)

I don't know why this isn't getting more attention. This is HUGE news. Not too long ago people thought that these green diodes were vaporware! This stuff is ground breaking and monumental. I love how we are getting all of these new diodes within the past few months, the Mitsubishi 635nm diodes and the single mode 445nm diodes. Now this! Looks like the laser community has a very bright future ahead of us (Pun very much intended)

I agree with you that this specific hue of green might be far less common, and I'm not trying to trivialize this review, it's awesome and the implications are even more awesome

qumefox said:

Your coming at this from a display standpoint and that's not the point.

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From my view the point varies from person to person. Its not the point for you, and you just stated your reasons why. They're perfectly understandable and fine reasons too. For me, since my interests are different, the point is along the lines of what I posted a few posts back. Different strokes for different folks, and neither position is better than the other here. You see my point. :na:

Well I have an interest in display too, but these particular diodes aren't really suited to that. The only thing they have going for them is it's a rare wavelength.

RHD ----
I hope your words can stop a stampeed of greedy ignorant cows from stomping a good thing you have started -- but I doubt it.................
Carry on and good luck.
HMike

Mike.. never spares the good ol' reality rod..

It's the 8 volt drive that has me going ??????????
I can wait for you guys to sort it out. I killed my share of diodes back in the good ol' RED days.
HMike

I still want to see a Po vs Ild graph on these.

Re: placeholder

aryntha said:

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Any chance we could get one or two more shots like these without the lens and with a cleaner window? I know I'm being greedy, but just curious about what I can see.

Obviously, you should omit information like scale and distance from target, I'd just like to see what sort of interference patterns are present in the diode's stock, untarnished form. Unless it actually looks like that with a clean window.

Thanks to both of you RHD and Aryntha!

I'v been following the thread and am loving what i'm seeing. It's exciting how quickly the technology seems to be 'hitting the market', i'm thinking of the Pico projector threads as well.

Looking forward to a big ol'Group buy if it ever becomes something obtainable. :beer::beer:

qumefox said:

This is easy to answer. Companies that manufacture laser diodes do NOT want anything to do with this community. 'Laser pointers' are two words they DON'T want to hear. Our 'community' is in NO way large enough to compensate for the liability risks incurred by sale of high powered diodes destined for laser pointers. Plus even if every 'laser enthusiast' bought one of these, it wouldn't amount to a 10th of the volume of say ca$i0's likely monthly diode order volume. Plus it'd only be a one time thing.

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I understand that we as a whole may not be one-tenth of their ordering schedule, but is that really a bad thing? How can extra penny or two (millions) hurt?

Also, how can there possibly be liability risks?

I understand the dangers of selling high powered lasers - somebody will point them somewhere they're not supposed to, user gets blaimed and seller gets bad publicity.

But these are cutting edge laser diodes! They are parts to be incorporated in your design. If your design happens to be a portable laser, what difference does it make? You're the one ultimately responsible for everything, as claimed immediately when you "AGREE" to purchase the diodes (some sort of EULA must exist, right?).

Besides, blaming the manufacturer of the laser for something bad is like blaming Heckler&Koch because somebody got shot. It's NOT their fault, it's the idiot that pulled the trigger / pressed the button.

Ofcourse, unless it's "Screw all the logic" scenario and the seller of the diodes ultimately gets bad publicity because of retarded usage of the lasers which happens to have their parts in it.

And so far, I don't see Mitsubishi, Nichia or n-Light refusing to sell much higher powered diodes to "small people".

Again, I'm not questioning your stance regarding this, and I really do respect all you guys, it's just that this logic gap is bothering me to no end.
As soon as it's clarified, I'll go disappear in Dark space, lurking again

Eudaimonium said:

Besides, blaming the manufacturer of the laser for something bad is like blaming Heckler&Koch because somebody got shot. It's NOT their fault, it's the idiot that pulled the trigger / pressed the button.

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I have no idea how things work in your part of the world, but here in the US that is exactly what happens.

Bar owners can and do get sued because they served that drunk driver one too many before they left. I'm sure the same thing happens to Gun manufacturers as well.

The same would hold true for Lasers. It would just take one aircraft accident caused by some idot with a green pointer and we've have a multi million dollar lawsuit filed against the laser operator, the laser manufacturer, and heck even the battery manufacturer.

US law is very flawed on this subject and people need / want someone to blame so they go after the people with the deepest pockets rather then the party actually at fault.

So it indeed DOES operate on "Screw all logic!" principle.

Well that kind of clears up why the manufacturer would hold out on offering the products to the community.

It just doesn't sit well with me that, it's one manufacturer. There are dozen others out there who are offering the products to the community.

Also, they're holding out on what can be an equivalent of entirely new, next-gen high end graphics card in computer gaming world.
If they went all out and offered it to everybody who would buy it, to quote Cracked.com,
"--the amount of money suddenly flowing into their pockets would offset the Earth's balance and sent us all hurling into sun.

And we wouldn't even fcking care[...]" Because green diodes!

I understand that a company would hold out, due to those liabilities.
However, how come that one company holds out, while dozens do not?

And those dozens offer far more powerful diodes, than the ones we are currently looking at?

What part am I getting wrong here?

All diode manufacturers 'hold out'. Few can legally just say 'no, you can't have one'.. again for legal reasons. And I imagine the manufacturer of these is no different. If you called them directly and asked for one, i'm sure they'd happily say "Sure!" then give you a 4 to 5 figure price tag on them. Just like Nichia and company do when asked for small quantity pricing.

The 445's for instance. I'm fairly sure ka$i0 gets the raw diodes in the $5-$10 range.. If you ask nichia for one.. What was the last quote I heard anyone mention.. $2000 or so for a single diode? The stupid pricing is because they don't want to deal with individuals/hobbyists.. without just blatantly telling them to 'piss off'.

Things are cheaper in bulk, but you haven't noticed that diode quotes to individuals by manufacturers is a bit.... extreme? Especially for diodes it's is KNOWN are in high volume production.

Correct me if I'm wrong but aren't these in pico projectors already?

Nichia to ship green laser for pico projectors in august, volume production in summer 2011

Misanthrop said:

Correct me if I'm wrong but aren't these in pico projectors already?

Nichia to ship green laser for pico projectors in august, volume production in summer 2011

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hmmmm that's interesting..
has anyone dismantled a new projector recently?

Misanthrop said:

Correct me if I'm wrong but aren't these in pico projectors already?

Nichia to ship green laser for pico projectors in august, volume production in summer 2011

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That's an old article. More recent news from companies like MicroVision has tended to say mid 2012.

focus adapters FTW!