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Old 10-29-2011, 02:14 AM #33
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Default Re: 470nm diode

Ok, I just got a 635nm diode from him today, and it's in the same housing as the picture there. It's a focusable housing. I'm purchasing a single diode as a sample now.

I think I'll be able to tell by nakid eye whether the color is within 10nm of 470. Who here would have the equipment to test it further?


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Old 10-29-2011, 02:22 AM #34
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Default Re: 470nm diode

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Originally Posted by Ablaze View Post
Ok, I just got a 635nm diode from him today, and it's in the same housing as the picture there. It's a focusable housing. I'm purchasing a single diode as a sample now.

I think I'll be able to tell by nakid eye whether the color is within 10nm of 470. Who here would have the equipment to test it further?
Cyparagon.

Though you'll definitely be able to tell with the naked eye. If I had an extra diffraction grating, I'd just pop it in the mail to you.
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Old 10-29-2011, 03:09 AM #35
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Default Re: 470nm diode

Looking forward to seeing the results! Though I wont be surprised if its not 470nm
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Old 10-29-2011, 04:04 AM #36
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Default Re: 470nm diode

Not to change the subject, but....
What the heck are you making with the glove? THATS' what I want to know!?!
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Old 10-29-2011, 04:23 AM #37
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Default Re: 470nm diode

Hi fixit. I made a thread about it here.
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Old 10-29-2011, 04:50 AM #38
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Default Re: 470nm diode

Freakin' nice!! Good luck with the gear, I look forward to seeing every damn dancing digit emitting photons (tried, but couldn't think of more dee's)
Sorry I couldn't help with the subject of the OP, but good luck with that as well. I'll be paying attention.
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Old 10-29-2011, 05:52 PM #39
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Default Re: 470nm diode

It could very easily be a diode module.

405s put out way more power given a driver's current draw of 120mA (which is my initial thought).

Diodes have been made, and can be readily manufactured for any wavelength from ~350nm to 500nm.

Given that both DPSS and diodes can be made into this module, the cost tells me that its more likely a laser diode.

/opinion
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Old 10-29-2011, 06:26 PM #40
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Default Re: 470nm diode

Well.. he said he "improved the voltage" to 6v. So now it runs on 6v rather than 9v.

I don't understand how, but I'm learning a lot from you guys trying to figure it out.
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Old 10-29-2011, 06:39 PM #41
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Default Re: 470nm diode

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Given that both DPSS and diodes can be made into this module, the cost tells me that its more likely a laser diode.

/opinion
That makes sense - as long as we've accepted that the wavelength of "470" is a mistake or typo.

If it really is a 470nm laser, then DPSS would actually be cheaper (473nm) than a diode.
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Old 10-30-2011, 02:24 PM #42
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Default Re: 470nm diode

I would be really interested if it turned out to be 470nm, but yeah, it looks like DPSS.
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Old 10-30-2011, 03:55 PM #43
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Default Re: 470nm diode

Look at the evidence:
- The output photo looks 405 diode in colour
- The output photo looks 405 diode, or 473 DPSS in shape
- The output power could be 405, 445(sm), 473nm DPSS, or expensive Nichia 470 diode
- The price would generally be 405 or 445(sm) range

If everything above is genuine, then this is likely a 405nm mislabeled.

If there's a weak link above (if for example the photo is not real), then some of the other options (like a 445 single-mode) start to be possibilities.

Of course, if ALL of the above is erroneous (photo is not real, prices have radically fallen, etc), then an expensive Nichia diode becomes possible.

I think that's all pretty far fetched. My money is on 405, or single mode 445 (in which case the photo was just a placeholder)
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Old 10-30-2011, 09:36 PM #44
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Default Re: 470nm diode

Ok rhd, you're allowed to be skeptical, but here is what I think:

This diode is in active R&D. I believe they are being made to order from scratch, and not using another company's premade diodes. The photo is of a housing with a focusing lens, which I believe is unnecessary for DPSS models. Not to mention that the manufacturer has specifically told me that it is not DPSS, so I am quite sure that I am not being offered a DPSS laser.

So basically, it comes down to the assumption that the manufacturer is lieing, or that he is not. A lie really doesn't make sense in this case. I have already bought thousands of $ of lasers from him that have turned out to be as described. Lieing about this would net him a couple hundred and jeopardize our current relationship.

But go ahead and feel free to insist that this entire thread is some sort of scam.
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Old 10-30-2011, 10:07 PM #45
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Default Re: 470nm diode

They may just be misinformed.
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Old 10-30-2011, 10:22 PM #46
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Default Re: 470nm diode

Hey Ablaze,

For the record - I'm not trying to shoot down your hopes for a new wavelength! I've done lots of crazy stuff in hopes of finding new diodes and new wavelengths. I ordered a 10 pound DVD writer from the late 90s, hoping to find a powerful 635 in it. I tore apart a pico projector to find a (slightly) higher wavelength blue. I'm ALL for new diode hunts. In fact, I was the first to alert the forum to the cheap Mitsubishi 635s, but I failed miserably because my initial stance was that "they were probably not real"

So my track record is not perfect as far as new diode sources go, but here's what I can tell you for certain:

- This company IS NOT making their diode from scratch. Unless the company you're dealing with is Nichia, OSRAM, or Opnext, they're not building their own diodes. Designing a new diode is a hugely resource intensive process done at a very high levels of specialization. Even CNI doesn't build their own diodes. This isn't a guess, this is a guarantee. They're not designing their own diodes. You may be confused about the difference between a "diode" and a "module". They could be (and probably are) making their own modules, but the diodes (which determine wavelength) are absolutely positively coming from someone else. Period.

Who is your Chinese supplier?
- If you can't say, or if they aren't a known business, or if they're swearing you to secrecy over just a few thousand dollars worth of sale, then they're not one of the handful of companies with the scale and resources to actually produce blue diodes.

I also don't think it's a scam, I think it's a mistake. We see these mistakes all the time. Truly. Here, we pay a lot of attention to the difference between 440nm and 450nm. But out in the world of laser sales, that distinction is often lost in the shuffle. We see 405s sold as 445s, and vice versa, ALL the time. In fact, we often see BLUE lasers described as 532nm, or 405nm lasers sold with IR filters. People make wavelength mistakes constantly.
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Old 10-30-2011, 10:24 PM #47
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Default Re: 470nm diode

Ok, yes, Cryaragon, you could assume that the laser manufacturer is just guessing about the frequency of their own lasers.

You could assume that some fat fingered typo by someone in the engineering department has misinformed the person in the sales department. If that is the case than I expect I'll be issued a refund in the next couple of days, and I'll be sure to tell you guys so you can rub it in.

I guess you could also assume that I am making this whole thing up for... attention? If that is your assumption then it seems that the only way for me to refute it would be to stop posting in this thread.
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Old 10-30-2011, 10:41 PM #48
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Default Re: 470nm diode

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Ok, yes, Cryaragon, you could assume that the laser manufacturer is just guessing about the frequency of their own lasers.

You could assume that some fat fingered typo by someone in the engineering department has misinformed the person in the sales department. If that is the case than I expect I'll be issued a refund in the next couple of days, and I'll be sure to tell you guys so you can rub it in.

I guess you could also assume that I am making this whole thing up for... attention? If that is your assumption then it seems that the only way for me to refute it would be to stop posting in this thread.
I doubt anyone thinks YOU are making anything up. They are trying to tell you to be careful as this seems too good to be true and there are NO "reliable" sources that can back this information up.

We as a forum usually catch wind when a new diode turns up and there is usually a datasheet from the manufacturer backing this information up. We as a forum also like to protect our forum from getting ripped off as well.

Basically dont take anything said to heart. We are just trying to say "be careful as this DOES seem too good to be true." Also remember, We as a forum sometimes get surprised sometimes too...
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