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New Green Diode NDG7575

RedCowboy

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Here are the screen shots I took earlier today from the ebay sales pages.

I had to resize to fit as one was zoomable with the magnifying glass feature and the other was not.

The NUGM02 datasheet came up as does not exist but maybe you have it? I doubt any of it adds up to a hill of beans, but the fact the NUGM01 and NUGM02 are in 8 diode projector blocks suggests there will be more powerful greens made for data projectors, they may be GBalls though. Maybe the 7575 had the wrong data sheet, has anyone tested one? If they are not in 8 diode high security blocks that means something, likely that if they are not for secondary markets then they are probably escaped or samples.



 

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Encap

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Look at both pages, the data sheets are in fact different, the threshold voltage is a little different as well but that means nothing much, what matters is the slope efficiency and the extra 200ma needed to get the same 1 watt from the 7575.

https://www.ebay.com/itm/New-Nichia-...item1c8c55a5c9

https://www.ebay.com/itm/Nichia-NDG7...item1c83937665
Both of you eBay links say the listing has been removed.

Ebay 7575 listing now says "manufacturer refurbished" --does not sound like something "new"
See: https://www.ebay.com/itm/New-Nichia-NDG7575-520nm-1W-Green-Diode-Brand-New-9mm/122613507529?hash=item1c8c55a5c9:g:6PcAAOSww9xZAaYR

DTR lists the NDG7475 as a 1W and the NUGM02 as a 900mW https://sites.google.com/site/dtrlpf/home/diodes
 
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RedCowboy

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I don't think it's new either even though they often put refurbished on anything they pull from a block that will be delivered with tinned pins.

I would love to see stronger can/window 520's but I am afraid the green upgrades may come with GBall lids, but who knows, without a real world test we don't really know what they were, maybe mislabeled 7475's or 700's

---EDIT---

Yes that one you just posted has the 0.7 slope efficiency on it's datasheet. Maybe a pre 7475, who knows until one gets tested but I don't expect anything special.

They do operate at 60 C max rather than 50 C max temp according to the sheet.
 
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Encap

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I don't think it's new either even though they often put refurbished on anything they pull from a block that will be delivered with tinned pins.

I would love to see stronger can/window 520's but I am afraid the green upgrades may come with GBall lids, but who knows, without a real world test we don't really know what they were, maybe mislabeled 7475's or 700's

---EDIT---

Yes that one you just posted has the 0.7 slope efficiency on it's datasheet. Maybe a pre 7475, who knows until one gets tested but I don't expect anything special.

They do operate at 60 C max rather than 50 C max temp according to the sheet.
Dtr says "Tricky as always 0.9W not 1W. Those are the NUGM02's projector pulls that have popped up no tinning on the bottom with tinned pins. I have some on the way which should be here tomorrow or Monday. I have been told they are slightly lower efficiency than the NUGM01's but I will put up a testing thread when I get them. They supposidly match this datasheet which says they are 900mW rated. I just hope they are not the 500mW version of a ball lens that can be over driven to right about 1W."
{pst 3048 here https://laserpointerforums.com/f46/permanent-thread-ebay-other-internet-finds-interest-read-all-op-please-sub-75750-191.html

Is in line with what "newgazer" says about the "mythical NDG7575" that nobody on earth sells except "newgazer"

I think NUGM02 and NDG7575 are the same animal individual diode-wise and nothing new as DTR has had them since April 2017

Whatever the "NDG7575 " is it isn't something to write home about---1W 520nm diodes have been around for a while
 
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BobMc

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I also thought about divergence but the spec sheets show the same divergence numbers for the 7475 and 7575

I expect the price will come down on these multi mode 1w 520's as the NUGM01 and 02 are around 100 dollars and I would expect new production 1w green multi modes would be made to compete, actually I would expect a GBall diode cost more to make than a can window so the question is do these 7575's come in the 8 block? If so they should be getting less expensive.

---------------------------------EDIT-----------------------------



Spec sheets are on these links.

https://www.ebay.com/itm/New-Nichia...and-New-9mm-/122613507529?hash=item1c8c55a5c9

https://www.ebay.com/itm/Nichia-NDG...e-Brand-New-/122466563685?hash=item1c83937665
It would be nice to get another green. Havn't built with the n520, but it's on my to do list. So another 1watt green sure would sweeten the pot. Hopefully they will come out with a 2 watt plus green soon. It may be a pipe dream, but it's a good one. :tinfoil:

You would think the gballs would be more expensive, but things don't seem to be that way? :thinking:
 
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Benm

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Another 1watt green, nice, wonder what the divergence is on it? :thinking:
Me too actually. The color and power are nice enough, but i wonder what beam pattern will come out of the finished product.

I suppose these are multimode diodes like many others, and 100 meters down rage the beam will be more or less a line. A next concern would be on how to fix that to some degree - things like prism pairs will help, but i only a pair for 445 nm or so, not to sure how well those would fare at 520 ish.
 




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