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FrozenGate by Avery

Ndg4216

Got my diode today from DTR. Got a chance to do some quick tests. I used the green coat 3E lens from DTR. EDIT: added china G2

Threshold was at 70mA

mA---- mW 3E---- mw G2---- nm
70------ 3.7------ 3.5------ 513
100----- 17.6----- 22 ------ 513.8
150----- 44------ 51------ 514.3
200 ---- 64------ 77------- 514.75
250 ---- 84------ 103------ 515.2
300 ---- 101----- 120------ 515.3
350 ---- 116----- 143------ 515.4
400 ---- 129----- 158------ 516

Spot size with 3E ~ 5X9mm at 48feet.

I tried to look at the color difference between a 7475. They looked the same to my eye. The spectrometer showed the 7475 maxed out at 518nm at ~1.5A so really close in wavelength.

All in all really nice tight beam. Very impressed with the 3E lens from DTR. Has anyone compared the 3E lens and a G2 on a 7475? My 7475 is in a projector and hard to change lenses.
 
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Those numbers look very good. It's probably more powerful than both PL515 and PL520 with the same lens.

Pity the WL wasn't lower, though.

+rep for testing!
 
Has anyone checked the wl for the pl515? Id be interested to see hiw low the "low binned" ones are.
 
AgentMcBaine said:
Why not run the beam through a lens with the improper coatings, like a 3 element for red or 405
edit: or just some other filter. Sorry, I'm not sure if that would work with AR coatings
Click to expand...

I don't quite understand the math/science of it in order to calculate what I would need. I also cannot say I know exactly what or where to look for a thread to learn more about this process. (edit: I just saw post #33, I guess I need no research for this one, thank you!)
 
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Here is a great comparison a member of PL made on the NDG4216 vs the PLP520-B1.:beer:

dkumpula said:
So I took some measurements for the new Nichia NDG4216 (100mW single mode 515nm) yesterday in comparison with the Osram PLP520-B1 (120mW multi-mode 520nm) and thought I'd share my findings.

iYkn0x.jpg


The NDG4216 has a nearly identical beam profile to the PLP520 when corrected with the G-2 lenses that DTR sells. At 86 feet, I measured the NDG4216 at 12.5mm x 5mm with the PLP520-B1 at 13.5mm x 5mm. There was a tiny bit less noise surrounding the NDG4216, but I've seen variations from lens to lens that could easily account for that. Beam at aperture was the same 1.5mm x 4.5mm for both.

I can't tell any difference in color between 515nm and 520nm, but 532nm is obviously more yellow as we all know.

My experience with the PLP520-B1 has been less than great when pushing them beyond their stated limits, so a potentially more resilient alternative is most welcome. I've damaged 6 of the PLP520s thus far including one today.

I haven't pushed the NDG4216, but I easily got it to 150mw and stable with the G2 lens and plan to leave it there to see how it holds up under normal use.

DTR is selling the new Nichia NDG4216 for 20% less than the PLP520-B1, so baring any future bad experiences with the NDG4216, I'll start pairing these for 300mW of single mode green. In fact, the only downside I see with the NDG4216 so far is that its a 3.8mm as opposed to the 5.6mm. I find my aging eyes and clumsy monkey fingers challenged when soldering the tiny leads coming off these 3.8mm diodes.

Just my $0.02 . .

-David
Click to expand...
 
The color looks too close to see the difference to me in the above pic comparison between the 520 and 515nm.
Back in the 515nm GB this is a couple of the pics I took showing the difference between my 515nm units color and a strong blue shifted one:
bgBFje.jpg

uINDum.jpg


I post those for information comparison only and I believe I got very lucky with such a low bin. The difference in color is very easy to see even though I've pushed it to over 100mW and it looks better in person.
 
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