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Old 07-30-2016, 04:44 AM #17
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Default Re: NUBM08 4.3W 455nm Laser Diode

I use the nubmo6 Gball in my nubm44 build and the line-bar looks tighter and better than a G2 to me.
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NUBM08 4.3W 455nm Laser Diode-1469850174.323.jpg   NUBM08 4.3W 455nm Laser Diode-1469850709.5861.jpg  


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Last edited by badboybilly; 07-30-2016 at 04:53 AM.
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Old 07-30-2016, 07:50 AM #18
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Default Re: NUBM08 4.3W 455nm Laser Diode

It's a shorter but thicker line, I want to get another and leave the Gball on and run it into a 3X expander.
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Old 07-30-2016, 11:19 AM #19
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Default Re: NUBM08 4.3W 455nm Laser Diode

Does anyone know what the fast axis angle is straight out of the diode without collimation?
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Old 07-30-2016, 11:47 AM #20
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Default Re: NUBM08 4.3W 455nm Laser Diode

The spec sheet typically gives perpendicular and parallel with the Gball in place when its a lensed can diode so you will likely have to measure it yourself, but if anyone knows please do tell.
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Old 07-30-2016, 02:46 PM #21
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Default Re: NUBM08 4.3W 455nm Laser Diode

I will measure it and report back if I can get a tape measure in hand again, not always easy to find simple things where I am at. The contract I am on is ending, going to be working in Iraq next.
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Old 07-30-2016, 04:27 PM #22
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Default Re: NUBM08 4.3W 455nm Laser Diode

Afghanistan to Iraq. I can't decide if that sounds better or not.
Are you buying things and having them shipped to you or home? Maybe I missed it but are you building lasers where you are at or dId you bring any with you?
I just posted a simplementation build with another 07E and I'll be very curious to see what everyone thinks when I get the pics up later today. I pushed it as hard as an sxd sets to and both my wife and I think the color looks kind of teal. Hoping my camera is going to show the dramatic difference between it and my other one. Also going to add other blues in for comparis on shots. If it blows it blows but the wavelength is worth it and I'm not going to use it for burning so I don't need a long runtime. I personally don't think I'm going to blow it. Jordan talked about running it at 5.8A even during testing. I really should have seen what the max setting really is for the driver but at the time I didn't feel like it and I certainly didn't expect such a large wavelengthe shift over my other one. For those of us like you guys (Red and Alaskan) who buy multiples of the same diodes it's worth messing around to see what's what. I wouldn't run one that hard if I was going to burn with it for any serious time. All these big boy diodes run pretty hot.
By the way, just because I don't really use my lasers for burning doesn't mean I don't think its really cool that others do. I've actually been using a 3.3W 9mm to burn away the film layer that is between one of my casement windows glass panels whose seal broke and I'll admit it's been fun Really happy how well it has performed. I've run it for over 5 minutes at a time before letting it cool and I swear it has an unlimited on cycle. It was built years ago by Rick Trent and has a larger heatsink that a normal MX900 would. I have never ever run a laser like that. I pretty much build, test and put them in cases. Most of my units haven't been run for more than a minute and maybe 20 seconds on cycle.
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Old 07-30-2016, 04:33 PM #23
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Default Re: NUBM08 4.3W 455nm Laser Diode

I didn't bring any toys with me at all, but I did buy a NUBM44 laser pointer from someone on the forum and had it shipped here, that and some lenses. I can play with them in my room, but not outside for several reasons; military base, airport runway 1/2 mile away, control tower for the runway 700 feet away from my room, war zone, surveillance cameras all over the place including on two large airdromes over the base. I'm not sure if Iraq is much worse, will find out.



Above photo showing the ability to take the raw output of the diode, shoot it into a 3 inch diameter projector lens assembly and focus to a tiny spot 12 feet away at a 45 degree angle... this made the spot much wider than it would have been if shot straight-on without an angle. Theoretically, if the diameter of a large PCX lens is close to the focal length, the spot can be reduced to the size of the wavelength. Now to borrow that tape measure back again and do some more measurements without a lens. If the divergence of the NUBM44 is the same as the 08E, I can back calculate to determine the angle of the beam coming out of the laser diode. I need this information to work up the lens diameter and FL I need for another setup.
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Last edited by Alaskan; 07-30-2016 at 05:16 PM.
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Old 07-30-2016, 09:43 PM #24
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Default Re: NUBM08 4.3W 455nm Laser Diode

Fast shipping from DTR as always.
The 08 Gball is in a shorter can and its bar at 15 feet it's 1 inch by 3 inches but wit a G2 it's a close match to the NUBM44 at a line that's 2 inches long and about a 1mm burn with some flood.
The Diode has the same anti static and same 3/5 wires off the pins .











I am going to run at 4.0 amps and use a G2 or 3 element and a sanwu 3X
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NUBM08 4.3W 455nm Laser Diode-sany0249.jpg   NUBM08 4.3W 455nm Laser Diode-sany0251.jpg  
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File Type: bmp Capture_07302016_161442.BMP (673.4 KB, 7 views)
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Old 07-30-2016, 10:09 PM #25
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Default Re: NUBM08 4.3W 455nm Laser Diode

Quote:
Originally Posted by Alaskan View Post
I think you might want to compare the Scotopic version as well, as we usually see the beamshot at night/dark surrounding, thus affecting the eye to turn into scotopic adaptation
FYI, that online tools are using CIE Photopic 1951 table.

Here it is from my program:
The data of power output are from DTR website, compared @ 4.0A supply for each wavelength, on a clear atmosphere.
Using CIE Scotopic 1951 table.


The 1mw vs 1mw:


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Last edited by astralist; 07-30-2016 at 10:18 PM.
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Old 07-30-2016, 11:08 PM #26
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Default Re: NUBM08 4.3W 455nm Laser Diode

Here's the NUBM08 with a 3 element, I will put it in a host and add a sanwu 3X expander and post a video on it later, I just ordered more 3X expanders but I may rob one from another build and do a quick video.


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Last edited by RedCowboy; 08-01-2016 at 01:43 AM. Reason: typo
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Old 07-30-2016, 11:53 PM #27
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Default Re: NUBM08 4.3W 455nm Laser Diode

Quote:
Originally Posted by astralist View Post
I think you might want to compare the Scotopic version as well, as we usually see the beamshot at night/dark surrounding, thus affecting the eye to turn into scotopic adaptation
FYI, that online tools are using CIE Photopic 1951 table.

Here it is from my program:
The data of power output are from DTR website, compared @ 4.0A supply for each wavelength, on a clear atmosphere.
Using CIE Scotopic 1951 table.


The 1mw vs 1mw:


It's not generally accurate to judge visibility of high power lasers as if in scotopic vision - if that was the case you wouldn't be able to differentiate colors. The only laser beam I've managed to view with scotopic vision is 405nm at low power, makes it look greyish and brighter when the vision finally "switches mode".

The most correct mode would probably be mesopic vision, but that covers a whole range of conditions and would be really hard to put to numbers.

As for rhd's tool, I'm pretty sure it uses the CIE 1978 photopic data.

Would you mind providing a link to the 2008 data used on your program?


Quote:
Originally Posted by RedCowboy View Post
Here's the NUBM08 with a 3 element, I will put it n a host and add a sanwu 3X expander and post a video on it later, I just ordered more 3X expanders but I may rob one from another build and do a quick video.

Whats the divergence like with 3 element?
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Old 07-31-2016, 01:34 AM #28
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Default Re: NUBM08 4.3W 455nm Laser Diode

About 7/8 of an inch at 15 feet, basically the same as the NUBM44.
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Old 07-31-2016, 05:45 AM #29
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Default Re: NUBM08 4.3W 455nm Laser Diode

Just a note. I see 445nm being used for the NUBM44. I have them listed as 450nm which was the tested wavelength @ 4W when Planters did his review of the NUBM44 over on PL.
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Old 07-31-2016, 09:22 AM #30
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Default Re: NUBM08 4.3W 455nm Laser Diode

Hi, DTR

Good to know that you now have 08s to sell. About 1 year ago I purchased my 1st NUBM44 from you and now you already have 08s at lower price than 44s back then. Thatīs great!

But summarising what I understand, this 08 is generally same LD as 44 with a (badly fixed) ball lens and 10nm shift to lower area. So if only talking about pure power, the 44/47 are still winners, right?

I see many experienced buildes are in this thread at the moment. I have a question and maybe better to ask it here than starting a new thread:

Thinking that PJs which use blocks of 44s can sooner or later become more accessible here in Europe as they are in US now I would like to prepare a kind of construction which would allow to fix different M9x0.5 threaded collimators over all 7-8 LD holes. The idea is to convert a block of 44s into a block of 08s but with possibility to use G2, G9 or else in place of ball lenses.

For this I wanted to drill 8 M8.5 holes at exactly 11mm distance in a copper plate 2mm thick and then tap M9x0.5 in the holes. Then fix it over the block and here you go!
But as you can see it is impossible to keep the exact hole places using a handdrill in shaking hands. And where I reside now there is no place for a proper drill press at all.
Can anyone of you guys do this for me? The plate size has to be 60x22mm as the block dimentions are.

Red, you once posted a video that with 11.9mm bits you can drill 12mm holes to perfectly fix Aixiz modules in a copper? chunk. Do you have a presision drill press and M8.5 bits to do what I failed to do? Maybe you would be interested in such a project, either? The threads I can cut later with my tap.

Edit: Oh yes, this copper plate on picture is 25mm wide, thatīs why dimetions on picture are as they are. It could be better to have an exactly 22mm wide one, but I only have these plates here.
Attached Thumbnails
NUBM08 4.3W 455nm Laser Diode-failed-lenses-adapter-44-bock.jpg  

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Old 07-31-2016, 09:24 AM #31
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Default Re: NUBM08 4.3W 455nm Laser Diode

@Atomicrox: actually i agree with you, the brightness of the laser may shift our eyes to the mesopic condition, sadly the mesopic table cannot be found anywhere on every research/journal websites.
Of course deriving the number only from the scotopic and photopic data may be problematic and kinda impossible for me

But again, i just used the number from the table, and the visibility also depends on the atmosphere condition

I got all the data from http://www.cvrl.org

The data from rhd's tool match with the CIE photopic 1951 data from the cvrl.
Let me know if you have another version of CIE table.

P.S:
About the scattering factor, i used formula from here
My program can be downloaded here
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Last edited by astralist; 07-31-2016 at 09:27 AM.
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Old 07-31-2016, 10:31 AM #32
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Default Re: NUBM08 4.3W 455nm Laser Diode

DTR, my bad, for some reason I thought the NUBM44 was 445nm, if 450, that's not so much difference from the 08 if it's longest wavelength is 455nm.

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Last edited by Alaskan; 07-31-2016 at 10:56 AM. Reason: added corrected chart
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