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Old 09-21-2016, 02:18 AM #17
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Default Re: Custom wavelength adjustable 462-470nm 2.3w NDB7675 build 2.7a blackbuck M8

Actually, the wavelength has nothing to do with how bright the laser is. It has to do with the tint of the color, which at 462nm to 470nm is difficult if not impossible to determine with one's eyes. It can be done with a diffraction grating. One that is 1000 lines/mm could be set up to measure the wavelength to within a nm or two if it were carefully set up, and the math involved can be accomplished with any calculator with trig functions.


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Old 09-21-2016, 09:40 PM #18
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Default Re: Custom wavelength adjustable 462-470nm 2.3w NDB7675 build 2.7a blackbuck M8

Someone in sydney have a spectrometer, would love to prove my statement!
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Old 09-21-2016, 10:08 PM #19
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Default Re: Custom wavelength adjustable 462-470nm 2.3w NDB7675 build 2.7a blackbuck M8

Quote:
Originally Posted by badboybilly View Post
Someone in sydney have a spectrometer, would love to check the (EXACT) shift!
I wish I had one but I don't Billy.
Would have been cool to see what the shift is.

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Old 09-24-2016, 12:51 PM #20
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Default Re: Custom wavelength adjustable 462-470nm 2.3w NDB7675 build 2.7a blackbuck M8

I'd rep you but the forum won't let me.

This is really cool, I've wanted to build something very similar for a long time but never found a proper pot-controlled driver (I already have the same diode here waiting). Mine wouldn't have a fancy host, though, just a box

If you don't mind I have a few questions about the driver:
-Is there are danger/reason why you don't turn the pot with the laser on?
-When set at 2.7A can it go down all the way to the lasing threshold with the external pot? I'm asking this because it the driver's ebay page says minimum current is 1.1A and that is well above threshold, I'd like to be able to modulate the laser down to ~100mW for indoors use.
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high 450nm: NewWish (12.6mW pk|5mW rtd) | Dominator by Blord (3010mW pk|2779mW avg during 5min)
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808nm: Classic modded from a 532nm (162mW avg)
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Old 09-24-2016, 01:07 PM #21
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Default Re: Custom wavelength adjustable 462-470nm 2.3w NDB7675 build 2.7a blackbuck M8

Hi bro
More builders should try this it's crazy how much the tint-wavelength changes with the external ujustment, I turn the external pot to were I want all the time with the laser on without any issues and it will dim the diode to off if that is the setting you want, you should be able to set it to 100mw just fine with a LPM, I could check to see the minimum lasing output if you like!

I'll do another video when I get home, in the first one I only have one hand free other on my iPhone so I couldn't keep the momentary pressed while I changed the current!

Here u go buddy I'd be ordering a driver before there all gone!

https://youtu.be/GbwFSMTl8ck

https://youtu.be/H5sy8lERfk0
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Last edited by badboybilly; 09-24-2016 at 11:37 PM.
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Old 09-24-2016, 02:37 PM #22
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Default Re: Custom wavelength adjustable 462-470nm 2.3w NDB7675 build 2.7a blackbuck M8

Fantastic, I'm eager to see the new video!

I'd really appreciate if you could check the minimum lasing output. I might buy one of these drivers depending on your results.
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low 445nm: C6 from Survival Lasers (1351mW pk|1289mW avg|1100mW rtd)
high 450nm: NewWish (12.6mW pk|5mW rtd) | Dominator by Blord (3010mW pk|2779mW avg during 5min)
462nm: 501B by Atomic (1507mW avg)
473nm: BWB-10-OEM labby by CNI (10mW rtd)
~462-476nm "Tunablue" by Atomic (1.5W pk)
low 520nm: MXDL pen by DTR (31.6mW pk|28.8mW avg)
high 520nm: Laserlands (8mW avg)
532nm: NewWish (28.6mW pk|26.8mW avg|10mW rtd) | Dapper (30.3mW pk) | Classic (120.0mW pk|103.1mW avg|100mW rtd) | "The Green Box" by Atomic (176.7mW pk|140.0mW avg)
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638nm: Classic from Lazerer (409.3mW pk|389.4mW avg|415mW rtd)
650nm: NewWish (10.6mW pk|5mW rtd) | Dilda (216.3mW avg|200mW rtd)
685nm: laser-in-a-box by Atomic (30.4mW pk|29.3mW avg) | 501B by Atomic (32.4mW avg)
780nm: module (2.7mW avg|5mW rtd)
808nm: Classic modded from a 532nm (162mW avg)
850nm: module (8.8mW avg|7mW rtd)
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Old 09-25-2016, 02:07 AM #23
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Default Re: Custom wavelength adjustable 462-470nm 2.3w NDB7675 build 2.7a blackbuck M8

So I've added some vids ubove,
i was able to set it to as low as 10mw,
I hope this helps Atomicrox!
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Last edited by badboybilly; 09-25-2016 at 09:47 PM.
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Old 09-25-2016, 09:40 PM #24
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Default Re: Custom wavelength adjustable 462-470nm 2.3w NDB7675 build 2.7a blackbuck M8

Quote:
Originally Posted by Benm View Post
How does this wavelength adjustment work?

The only way i can think of doing that is to control the diode temperature, but that typically has a change rate of something like 0.2nm/K, so to get 8 nm of adjustment range you'd need a temperature change of something like 40 kelvin/celcius.

From the photos it looks like the diode is very well thermally connected to the host directly with no TEC/TEH system in between.

Mechanical build is amazing though



Have you read any of RHD,s spectroing on these diodes budy
This thread here proves it possible to shift wavelength by 8nm! Just by adjusting current!

Spectro-ing the new Nichia 1.4W "462nm-470nm" NDB7675

Also here's Cyparagons spectro on one!
Attached Thumbnails
Custom wavelength adjustable 462-470nm 2.3w NDB7675 build 2.7a blackbuck M8-1474840824.4184.jpg  
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Sigelli Mec Mod BDR 209 .5a Nano 710mw
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Custom RGB Module Flexdrives 300mw+

Last edited by badboybilly; 09-25-2016 at 10:07 PM.
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Old 09-25-2016, 09:50 PM #25
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Default Re: Custom wavelength adjustable 462-470nm 2.3w NDB7675 build 2.7a blackbuck M8

Quote:
Originally Posted by badboybilly View Post
So I've added some vids ubove,
i was able to set it to as low as 10mw,
I hope this helps Atomicrox!
Thanks for the videos! This is certainly one the most wonderful lasers around here.
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low 445nm: C6 from Survival Lasers (1351mW pk|1289mW avg|1100mW rtd)
high 450nm: NewWish (12.6mW pk|5mW rtd) | Dominator by Blord (3010mW pk|2779mW avg during 5min)
462nm: 501B by Atomic (1507mW avg)
473nm: BWB-10-OEM labby by CNI (10mW rtd)
~462-476nm "Tunablue" by Atomic (1.5W pk)
low 520nm: MXDL pen by DTR (31.6mW pk|28.8mW avg)
high 520nm: Laserlands (8mW avg)
532nm: NewWish (28.6mW pk|26.8mW avg|10mW rtd) | Dapper (30.3mW pk) | Classic (120.0mW pk|103.1mW avg|100mW rtd) | "The Green Box" by Atomic (176.7mW pk|140.0mW avg)
589nm: Spartan from Dragon Lasers (58.4mW pk|37mW avg|50mW rtd)
632.8nm: HeNe pointer by Atomic (0.68mW rtd)
635nm: NewWish (4.6mW avg|5mW rtd)
638nm: Classic from Lazerer (409.3mW pk|389.4mW avg|415mW rtd)
650nm: NewWish (10.6mW pk|5mW rtd) | Dilda (216.3mW avg|200mW rtd)
685nm: laser-in-a-box by Atomic (30.4mW pk|29.3mW avg) | 501B by Atomic (32.4mW avg)
780nm: module (2.7mW avg|5mW rtd)
808nm: Classic modded from a 532nm (162mW avg)
850nm: module (8.8mW avg|7mW rtd)
980nm: NewWish (81mW pk|5mW rtd) | 2nd line around 490nm

5W Ophir LPM

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Old 10-15-2016, 12:47 PM #26
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Default Re: Custom wavelength adjustable 462-470nm 2.3w NDB7675 build 2.7a blackbuck M8

I can't believe I missed this build. Wonderful and yes you absolutely can see the differences with adjustment. Anyone can do it with a variable DC power supply to see for themselves. There are a few diodes that really stand out with current adjustments and I've mentioned and tried to show it over and over so others will really put some thought into how hard they want to push their diodes. My favorite is the 07 although it is unfortunately more expensive than most diodes. When you buy a diode like this its like buying a bunch of diodes in a general range and you get to choose the color you like the best. Its also why i prefer an adjustable driver as the diodes themselves may differ in wavelength. We all want new wavelengths but there is a way to get some really interesting shades with what we have right now so why not take advantage of them.
This is a most excellent build and I'm thoroughly impressed. I sure wish I could do what some of you can. Being a machinist and in this hobby is like a perfect marriage.
This reminds me that I have all these gratings now and haven't gotten around to using them yet. I've just been super busy with others lasers and life to get around to trying them out. I first need to see how a couple of known wavelengths come out before trying others.

Anyways, I HIGHLY suggest you buy another 07 with an adjustable SXD V-3 set to max which should be somewhere between 5.3-5.5A and be amazed at how different the color is. Unless the diode is wavelength is way low to start I would expect it to have some green tint and be night and day different from your other one.
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Old 10-15-2016, 09:14 PM #27
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Default Re: Custom wavelength adjustable 462-470nm 2.3w NDB7675 build 2.7a blackbuck M8

What a really nice build !
Bravo !
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Old 10-16-2016, 10:40 PM #28
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Default Re: Custom wavelength adjustable 462-470nm 2.3w NDB7675 build 2.7a blackbuck M8

Thanks Pman!
I might just do that but with adjustable blackbuck M8 at 6+amps and just watch that wavelength shift before my eyes, on the go, I might add a 6x pair and correct it also, now that would be a cool laser, so much I want to do and so little time, at the moment this adjustable build is my favourite but not for long, glad you all like it!

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Originally Posted by Sceeker View Post
What a really nice build !
Bravo !
Thanks bro!
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Last edited by badboybilly; 10-16-2016 at 10:41 PM.
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