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Old 04-07-2012, 06:12 AM #1
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Default New 9mm 445 diodes

Nichia NDB7875 9mm 445nm Laser Diode


So there is a 9mm version of the 445 diodes we know and love.


Here is a quick power test on this diode with a G-2 Lens




























I have found them so far in four projectors. Here are some pictures of the blocks they come in.



















Looking inside the unit we can see it has four bond wires per side and a extra wire that is for the built in ESD protection.




Close up of the ESD protection.




Here is the pin-out for this diode. Use the indention's on the side to get oriented.







Now you may have noticed this diode has a lens that is already on it. Now I expected them to suck like the Ca$io diodes but these are awesome. They have shown to outperform the G-1/2 lenses by about 5%.






Here is a comparison shot of the divergence between these new 9mm diodes and the M140's. Apart from a minute focus difference looks to be about the same.




So far we have seen some of these diodes pushed past 3W with the included lens or G-2 but most average between 2.6W-3W @ 2.4A.





Here is one Lazeerer has that does a little over 3.3W and some have even coming in as high as 3.6W.




One tested by RHD showed about 2A gives the diode a wavelength of about 450nm.


here are some interesting results from the guys over @ PL. 3.4W with TEC and 2.5W corrected without for 2 hours.
9mm 445 amazing

Quote:
Originally Posted by Blord View Post
I ran out of aceton so I use concentrated ethanol or pharmacy alcohol for this. This works also fine for me. First I let it soak for a hour in a small bottle to loosened up the bond between lens and cage.
Then I break the metal cage with two pliers. Hold each side of the cage and twist. Use gentle force, just enough to crack open the cage. The lens will become loose.
I put the lens back in the alcohol for another 2 hours. The glue has become so soft that you can scrap it off with the fingernail.
The lens has a slightly blueish AR and not completely colorless.
I haven't put it in the barrel yet to test it but no damage can be seen and the AR is intact.







Quote:
Originally Posted by offroadfreak8582 View Post
Hello fellow enthousiasts!

Got my 9mm diode in this week and today i started on removing te lens etc. First i broke of the lens from the diode by breaking 1 attachment at a time with needle nose pliers (very delicate job).

Then i put away the diode for later and dropped the lens with metals still on it in alcohol. I left it there for about an hour. Grabbed two good pliers and took off one metal side like in this picture from blord: (sorry for stealing this pic, but just to show.)



What i got was that only one side broke off.. So i put back the rest in the alcohol in hope to soften the glue. After that i took remaining metal between pliers and just pushed the lens of with my thumb which worked great!

The remaining glue wasn't really that much, but it was enough to make the lens inable to fit in DTR's new lens module.

How did i fix it?

This may sound kinda careless but it worked great! I got myself some very fine sandpaper and gently rubbed the sides and i dropped the lens in alchohol again to clean it again. dried it and checked it out with a 15x loup. Perfect condition, AR coating perfect. Even tested the output with a C6 build flawless.

Then about power increase with a c6 with normal glass lens i got about 1200mW And with th 9mm diode about 1430mW is this a "normall" increase?

Now for testing this diode

greetings,,
Quote:
Originally Posted by DTR View Post
Just an update to that thread I am no longer using the black bottom mounted lens barrels due to their incompatibility with the 9mm diodes. With the custom machined brass lens barrels I am now using with the G-2's they mount the lens pretty much the same way as the G-1 and it also has an enlarged entry aperature as well. These new ones work great with the 9mm diodes and they also can use the full spring from the Aixiz module to keep them tight.







It is all packed up ready to go out tomorrow. Good luck.


Quote:
Originally Posted by justinjja View Post
Which lens holder do you have?
If you have the golden one it is different from the picture from Blord

You just unscrew the nut
drop the lens in
make sure the flat part of the lens is at the bottom
(curved part faces the inside of the holder)
then screw the nut back in until the lens is secure




Last edited by DTR; 08-26-2014 at 06:04 PM.
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Old 04-07-2012, 06:15 AM #2
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Default Re: New 9mm 445 diodes

Nice find. But those are some ugly fat diodes! haha

Seeing all this talk about differnet diode sizes recently, was wondering are there any fundamental differences b/w the 9mm/5.6mm/3.8mm diode sizes? Like the logical bigger diode = more output capabilities. I would actually believe that the diodes were just made in different sizes for the heck of it.

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Old 04-07-2012, 06:36 AM #3
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Default Re: New 9mm 445 diodes

Nice find and is this another top secret diode?
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Old 04-07-2012, 06:40 AM #4
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Default Re: New 9mm 445 diodes

I have a feeling these diodes can take higher currents than the H's.

Last edited by RyanElectro; 04-07-2012 at 06:40 AM.
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Old 04-07-2012, 07:09 AM #5
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Default Re: New 9mm 445 diodes

Awesome work...

Could you please verify that the readings you are posting are with the AixiZ 3 element lens??

1.9 Amps gave over 2 Watts with AixiZ lens?

Making the same 'line' instead of dot?

The picture looks like more of a round dot. (hopeful)
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Old 04-07-2012, 07:15 AM #6
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Default Re: New 9mm 445 diodes

Quote:
Originally Posted by jayrob View Post
Awesome work...

Could you please verify that the readings you are posting are with the AixiZ 3 element lens??

1.9 Amps gave over 2 Watts with AixiZ lens?

Making the same 'line' instead of dot?

The picture looks like more of a round dot. (hopeful)
Well the picture of the lens that comes on the diode did look more round but it is not focused as well as you can with the three element lens. I just ran it for a second @ 300mA to get a picture of the output as it was not in a module. But it did look a little more round. The power tests were done with the three element lenses(Aixiz). I can't get my G-2's to work with this rayfoss module. They bottom out to early.
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Old 04-07-2012, 07:18 AM #7
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Default Re: New 9mm 445 diodes

Once I get the diode from you, I will make a custom 9mm copper module for it. I'm sure the 405-G-1 should be able to get focus...

Edit: Available here.
FS: 9mm Copper Module (1/2" round diameter)
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Last edited by jayrob; 04-16-2012 at 08:25 PM.
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Old 04-07-2012, 07:28 AM #8
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Default Re: New 9mm 445 diodes

Nice diodes!
is it true that the new phone projectors are using the blue VCSEL? if so then this is
great news as the wavelength of these is far narrower than conventional diodes.
Also 445nm VCSELs would probably only draw 15mA for 4.5mW output.
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Old 04-07-2012, 07:29 AM #9
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Default Re: New 9mm 445 diodes

From where extract those diodes?
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Old 04-07-2012, 07:38 AM #10
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Default Re: New 9mm 445 diodes

Wow man this is awesome!! Can't wait to see what this baby will do with the G1 lens.
I would definitely be interested in the copper modules too Jay!!
Very Excellent work Jordan!!
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Old 04-07-2012, 07:47 AM #11
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Default Re: New 9mm 445 diodes

Quote:
Originally Posted by conundrum View Post
Nice diodes!
is it true that the new phone projectors are using the blue VCSEL? if so then this is
great news as the wavelength of these is far narrower than conventional diodes.
Also 445nm VCSELs would probably only draw 15mA for 4.5mW output.
Quote:
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From where extract those diodes?
I don't know how much has / hasn't been said about the source of these diodes. But in the interest of avoiding unnecessary speculation I think it's ok to comment that these diodes aren't from phone projectors (or anything weird like that), and they're probably (well, almost certainly) not VCSELs.
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Old 04-07-2012, 08:18 AM #12
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Default Re: New 9mm 445 diodes

These look incredible... hmm. Are people gonna reveal the source? XD
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Old 04-07-2012, 08:41 AM #13
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Default Re: New 9mm 445 diodes

Quote:
Originally Posted by Wolfman29 View Post
These look incredible... hmm. Are people gonna reveal the source? XD
It is out of a new DLP projector. Not really a secret just trying not to use any names.
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Old 04-07-2012, 08:46 AM #14
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Default Re: New 9mm 445 diodes

Oh, the big one that is all laser tech?
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Old 04-07-2012, 09:11 AM #15
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Default Re: New 9mm 445 diodes

Amazing grace !!
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Old 04-07-2012, 09:15 AM #16
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Default Re: New 9mm 445 diodes

As soon as one is killed, whoeve does that first, de-can it.
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