505nm and 480nm diode RESULTS

[BillyBob]

Hey DTR, does it really look that blue in person? Also when will both diodes be for sale?

 

[DTR]

Hey DTR, does it really look that blue in person? Also when will both diodes be for sale?

Nope the camera does blend colors a bit. With this camera you cant tell 405nm from 445nm.

Check this out.

And this.:eg:

 

[BillyBob]

Okay thanks DTR!

 

[ZRaffleticket]

Uh. Maybe these aren't 30mW diodes and we're just vastly under-driving them? This seems sooooo wrong. I love it. Bathroom break was totally worth bringing my phone along with

 

[paul1598419]

Ah I see. Does lazerman know how his diodes were tested by junktronix? I'm pretty sure his are all not pressed.

And yeah cynical, I'll let you and my other buyers know who gets what when the results are in

Edit: I'm looking at a 12 hour day tomorrow and then again Friday, gotta love work trips. LPF access is limited but I'll see what I can do.

If you can Paul, press what 480's you can - preferably from the fedex batch first. The 505s are more of a backburner for me, I can press those on my own (I have two or three copper heatsinks at home).

First of all, nice job, Jordan, on testing the 505nm diode. You pushed it way further than I would have. I'd have stopped around 450 mA.

The reason that Junktronix was able to test the power was because they used a photo-diode based power meter and it probably wasn't accurate unless it was manipulated to take into account of the wavelength. So, take that power reading with a grain of salt. It was also done without a lens. I can take spectro measurements without heat sinking it, but they still can't be pushed far, or for long like that. I'll do my best with the rest of the "480nm" diodes.

 

[ZRaffleticket]

Also Paul, you now have permission to run the 480nm up to 450mA. I had no idea these things were so... unnatural...

 

[paul1598419]

Also Paul, you now have permission to run the 480nm up to 450mA. I had no idea these things were so... unnatural...

Just because these can be run up slowly to 450 mA without failing in a very well constructed heat sink, doesn't mean you will be able to run them on a driver at that current in a pointer. Especially a pen.

 

[DTR]

The power rating is probably correct for the intended application and life span needed. What they do when you push them to the breaking point and what they are rated is a big difference. A lot of the new generation diodes are designed and marketed toward DLP projection and to get to a 20K hour rating to match up with LED's they have to lower the rating considerably. The 80mW 450nm diode does a little over 400mW when pushed to the breaking point so don't think it is that unusual the results we are seeing. I will make a graph tomorrow of these tests which should give us some points we can use for recommended currents for different uses like low duty cycle and low overall life use like in portable units, continuous running for 5K, 20K ect...

 

[ZRaffleticket]

That is true... didn't consider ramping up current vs straight on. Shoot.

Though I'd stick a high current one in a more suitable host. I have something big and bulky sitting at home that I've been meaning to use...

Anyway, it's bedtime for real now. I shouldn't be up all night on this thread

 

[DTR]

One thing I would bet just about anything on is the blue is a 470nm and the main source is pulling a bit of exaggeration on them. If none have hit the wavelength at the rated current I just do not see any way they would be rated there.

Also the 505nm is not as blue as I had expected. I had a 500nm freak diode before and remember it being a little more blue. This does not look to far off from the PL515 diode. Here was a pretty decent pic of the 500nm I had and the wavelength test.

 

[paul1598419]

I'll have some more results for you tomorrow. It is still early where i am.

 

[LtKernelPanic]

Man every time I check this thread makes me want one of each of those diodes more and more. Of course it's been so long since I've built a laser I dunno what drivers and hosts are available anymore. :crackup:

 

[paul1598419]

@DTR
I haven't yet had a chance to take a spectrometer reading on these "505nm" diodes, but you could very well be right. I know the "480nm" diodes have yet to hit that number with any tested so far.
Actually, I think these are 473nm diodes as that is what I get when they are driven the way they are supposed to be. That's not too bad. I wonder why they would try to pass them off as 480nm. Do they think that makes them somehow more valuable?

 

[Deleted member 16589]

Ah I see. Does lazerman know how his diodes were tested by junktronix? I'm pretty sure his are all not pressed.

And yeah cynical, I'll let you and my other buyers know who gets what when the results are in

Edit: I'm looking at a 12 hour day tomorrow and then again Friday, gotta love work trips. LPF access is limited but I'll see what I can do.

If you can Paul, press what 480's you can - preferably from the fedex batch first. The 505s are more of a backburner for me, I can press those on my own (I have two or three copper heatsinks at home).

Yes None of my diodes are pressed. They were tested in a heat sink with a retainer ring.

 

[badboybilly]

DTR

Hey Jordan
I paid the invoice last night and have not herd back from you,

Can you email me buddy please.

 

[RedCowboy]

Man every time I check this thread makes me want one of each of those diodes more and more. Of course it's been so long since I've built a laser I dunno what drivers and hosts are available anymore. :crackup:

I would want a boost driver as these diodes operate at 6+ volts, also I want to use a single 3.7-4.2v cell, these are low power and should be ultra compact in my opinion with a beam mask to make the output look as clean as possible.

I have been wanting to see a 1/4 watt of single mode 495-500nm but 505 is close and 50mw, well for a super compact build it would be nice in my opinion.

These host would work well and are only 5 dollars with a decent little 532nm module, hell I wouldn't be surprised if the Chinese crank these out with the 505nm and 475nm direct diodes for 20 something dollars each turn key before too long.

The heat sink is drilled ( actually it's likely extruded and then threaded ) slightly larger than 12mm but that's an easy fix, just over drill it to fit the 12mm module plus a piece of a common copper house pipe wrapped around it.

Also any of the vape housings, but again it needs a boost driver.

Also lifetime17 makes a lot of heat sinked hosts, as well as others, but with a boost driver any of the vape sinks which lifetime or others cut can be used with a vape battery holder and 510 screw socket.