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FrozenGate by Avery

GB: PL520 murder fund

63 short on the second diode, now 53. I'll ask you to the list WBS, but I'll collect the money when we have reached the 148$ goal :)
 





wannaburnstuff said:
If we can get a boost driver for these then I will be putting one in one of the MS V3's I have coming soon :D would be my EDC laser for sure!
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EDC laser?
steve-angello-edc.jpeg
 
I wish I had the money to go to EDC... I would totally build a 1.5W 445nm pen and stuff it in my shoe with no intention of being able to take it home :P.
 
I've been designing a new driver just for my green diode, and as long as everything checks out ill post it open source. It will drive these diodes from a single 1.5v cell.

Also the benboost from matts site will work. It is definitely safe ive scoped it plenty of times.
 
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benmwv said:
I've been designing a new driver just for my green diode, and as long as everything checks out ill post it open source. It will drive these diodes from a single 1.5v cell.
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Will it also work with a single li-ion? Sounds interesting, definitely interested.
 
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No reply from Will yet - worst comes to worst we wait a week and buy from DTR.
 
One thing nice about that 520nm wavelength is that it is the more luminously efficient than 555nm for photopic vision. Perhaps it'll be more useful for projectors and night time viewing than 532nm, aside from it being a single diode instead of a DPSS type arrangement.
 
So I was thinking about how much color difference we will see, and another situation popped into my head....

We are comparing 532nm to 520nm(and vice versa) with a difference of 12nm. 635nm and 650nm are only 15nm off, and we can see a very visible difference in the colors. So would it be logical, then, to assume that the difference will be similar?
 
Well, our eyes contain 3 cones, of which two are spaced rather closely around the green-yellow region, while the last one is around the blue region.

I'd think that because the green-yellow cones are very close to each other, a slight change around that region would be easily detectable, whereas, in the green-blue region, it's more difficult.

I'm thinking of the analogy where you have a beam on two supports. If the two supports are very close to each other, and the weight on the beam shifts slightly (while in the middle between both supports), the change in weight distribution is more significant than if the supports were far apart from each other.
 
wannaburnstuff said:
So I was thinking about how much color difference we will see, and another situation popped into my head....

We are comparing 532nm to 520nm(and vice versa) with a difference of 12nm. 635nm and 650nm are only 15nm off, and we can see a very visible difference in the colors. So would it be logical, then, to assume that the difference will be similar?
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Yes, but an even greater difference. You would see no difference between 670nm and 685nm, expect for the brightness. It depends on the spectrum.

593.5nm and 589nm can easily be distinguished and that's only a 4.5nm difference.
 
Without a reference, it'll be hard to tell much difference in hue. After all, even "off" white mixes still look white to your eyes after they get used to it.

Your eyes are more sensitive to intensity than color, and your color vision depends a lot on opponent processes for the final interpretation of color. So really the main benefits of these different wavelengths (aside from the tech and the shape of the beam) is how bright the specific wavelength appears compared to others. With 650nm vs 635nm, it's hard to really tell which is which unless they're close together. Sure the 635nm laser is more "orange" but it could very well be interpreted as just a brighter 650nm. The main benefit of a 635nm is that you get more bang for your buck in terms of perceived brightness for a given power. Coupled with greater power output, the 635nm lasers are often a better choice than the 650nm variant -- though they do often have worse beam shapes.

I don't expect 520nm to look all that different than 532nm other than intensity when there is no reference to compare. Together with the 532nm, the 520nm will look more bluish, but for most intents and purposes, it'll still register as bright green.
 
Just saw THIS video by Lazeerer that very well shows the difference. As we all know, cameras don't always do an accurate job of displaying colors, but it helps me. I am PUMPED for these diodes!
 
Mine came in yesterday!

The driver can take from 1v up to the diode vf. I have similar one that I use in an AA host and I can switch between alkaline and li-ion, but that one only goes up to 5.5v output. The alkaline is like a low power mode, a single AA cant run an m140 very hard ;)
 
ARGLaser said:
No reply from Will yet - worst comes to worst we wait a week and buy from DTR.
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Looks like they should be here today or tomorrow. They are at my local DHL sort facility now but they just arrived about an hour ago so I don't know if they will make it on a truck for delivery today. Tell you guys what I would throw $50 toward the experiment and knock it off the cost of a diode.:beer:
 
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