I wonder what kind of beam this would give in a zoomie…
It’s a shame about those two darker notches in the die, otherwise it could be a very nice candidate for an aspheric/lens light. That strange flattened dome profile seems to present an even and round die image from the front.
At least looks like it to me from these images.
Awesome testing work as usual Djozz, always enjoy reading about these new emitters and seeing them put through their paces properly. 
Even with the notches, it’s still streets ahead of a square grid 
Indeed 
Thanks djozz these look interesting,
I look forward to when some of us starts to dedome these or maybe more likely the colder versions for some XP-G2 comparison thrower action
Come on Cree give us a XP-G3 
with some extra fat bond wires so we can over drive them like crazy, you can’t let the competition sneak up on you like this
This sounds great! These fit on an XPG star?
Where do I buy the correct one?
These fit on a XP-star with some extra care. You better not start with a big surplus of solder and then squeeze out the excess, like you can do with Cree XP-leds, but use a moderate amount of solder, and gently push the led into the middle, then you get a decent reflow.
This exact led can be had at RS-online and Digikey, for the partnumber see the OP, they will have others tints and bins as well.
I am a bit doubtful if these can be dedomed succesfully, unlike the first gen. Squares the phosfor looks blended with the silicone. I have none spare for a dedome test at the moment.
I paid (with shipping included) about $3 per emitter, about XP-G2 level I guess. Dedoming this one does not look promising, see post above, who is going to try? 
I can always count on a kind reply from you Steve, I appreciate that!
And thanks for the other replies as well :-)
Nice work, again, djozz. Much appreciated
How big is the dome compared to an XPG2? Will these fit inside an unmodified Carclo triple TIR optic?
Oslon dome 2.2mm dia, base of dome 2.6mm
XP-G2 dome 3.06mm dia
Carclo triple TIR shouldn’t be a problem.
I don’t need 5 more medium sized LEDs just now, but this looks like real progress. Hooray!
Thanks for the test, djozz, excellent work. These new Oslon Square look very promising. I hope we’ll see a dtp-copper-MCPCB for them, especially a triple-version.
+1 :bigsmile:
As expected dedoming fails: much of the phosfor is mixed with the silicone. I tried the hot method but usually then the gas method does not work either. You could try slicing the dome to close to the die, but I'm not sure if you improve the illuminance with that...
(stereo image)
I have a headache trying to find one of the new square LED’s on digikey in a cool white. If somebody can find it and post a link I’d appreciate it. Djozz, I couldn’t even find the one that you listed. I found a lot that had similar part numbers but not the same. Like you said, the Osram part numbers make no sense!
I think dedoming will always increase the luminance, unless there is an air space between the die and the dome, as with the XP-L. The total internal reflection at the air where the dome used to be reflects light back into the phosphor, making it brighter. The dome in your picture looks different shaped, but that outer surface is just passive optics.
Pretty cool LED. It looks like as long as you're sticking to 3A or less the gain isn't huge (except for the lower vF), but you can definitely push it harder! Thanks for sharing.