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  1. Exerd

    3.5W P / 2.5W CW 638nm HL63520HD

    Alaskan, If you can provide adequate test data on the pair, I would mount them directly to the copper slugs in my J20 hosts, use the largest copper piece I have, knife edge them, then combine them with a PBS NUBM44 v2 output, or just dichro mirror them with the 450nm 7W output, and get...
  2. Exerd

    3.5W P / 2.5W CW 638nm HL63520HD

    For sake of simplicity, let's talk about 1 diode. I understand that 2 cylindrical lenses are required as it's essentially 2 individually emitted beams which need correcting, but I'm trying to visualize where you would place any common-size cylindrical lenses in your proposed arrangement. Could...
  3. Exerd

    3.5W P / 2.5W CW 638nm HL63520HD

    So someone should be knife edging single diodes by now! :D
  4. Exerd

    3.5W P / 2.5W CW 638nm HL63520HD

    I noticed people talking about the xxxxxG84 638nm, then saw them talking about 3W of pulsed 638nm coming next like it was (exciting). Stumbled on this and thought I was bringing something special or new to the table on that notion. Whoops! Pardon me. I hadn't realized they arrange these as...
  5. Exerd

    3.5W P / 2.5W CW 638nm HL63520HD

    Searched forum, no mention of this diode yet--which surprised me. It is not a triple beam, rather a double diode/beam multi-mode in 9mm package made by Ushio. Here is the spec sheet PDF link from Ushio: HL63520HD.pdf Enjoy :)
  6. Exerd

    The color of 410-440nm range

    I maybe wandered outside of the topic discussion a bit in that I was attempting to compare a broader region of colors such as 405nm to 520nm, or etc. There are two questions that I find generate different results or different consequential handicaps that are often assumed of end-spectrum color...
  7. Exerd

    The color of 410-440nm range

    No one should have to ask if there is a difference between seeing two different wavelengths in the visible region--common sense should dictate that. I won't look down upon any question which inspires further thought and generates better discussion, however. ;) To add even more confusion to this...
  8. Exerd

    Set-up for combining 4 LDs

    Thanks a lot guys. You made me realize, I should not read right before bed on some late nights. I surely sat there looking at Light Superglue's photo for some minutes like this: :thinking: Starting off in the 405nm forum I had presumptions, and upon seeing "BDR-209" a few times, I jumped the...
  9. Exerd

    Set-up for combining 4 LDs

    On a side note to your testing you could use a webcam connected to a laptop. Then you could remote into the laptop from your Android and view the webcam image on the screen. I don't know which method you'd find easier for your scenario but it's another thought. I honestly was not aware that 4...
  10. Exerd

    Best lens setup for smallest most perfect focus dot possible at around 300mm distance

    I can help. Instead of using words like "small", if you simply specify the requirements using a measurement system, we could turn this into physical understanding using the math. That should be straightforward. I.E. Maximum spot size at target = <0.25mm ⌀ You cannot make an image projection...
  11. Exerd

    Dead BDR-209

    Bingo... Number 2!!! It's a more common mistake than you would think, and happens to the best of us. I was originally warned of it from a member here about 6 years ago, but sometimes I can forget things. I've blown a 405nm 12X on a $400 lab supply once. Trust me, the price of the supply...
  12. Exerd

    My NUBM08 Beater.

    OK here's what I'm trying to allude to: Scale. I don't offhand know the specs of the G2 lens (it's simply the only small lens I use regularly). But let me make up some phony specs to convey my idea; say that the G2 has a 4mmFL, and it's diameter is 6.5mm. Taking a step back, the raw output of...
  13. Exerd

    My NUBM08 Beater.

    Ahh ok, I see what you are saying, I think. You're saying that while technically a 3X longer focal length than a G2 with same NA as a G2 will produce a beam 3X larger with 3X less divergence than a G2 alone, it's the fact that the corrective optics could not be as small since the beam would be...
  14. Exerd

    My NUBM08 Beater.

    I've always been on the same "deal" you are on with expansion leading to higher burning potential at further distances with the higher diverging multi-modes, but that thought brings up an interesting question I have RedCowboy. Instead of expanding, which takes a lot more room and mounting...
  15. Exerd

    NUBM07E 465nm 2.9W Diode Test (Hitting 470nm+)

    Depends, I have these diodes but decanned, but with a little info this is simple to figure out. Is the G-ball lens set at its focal point for infinite focus? If the g-ball is set at its focal point, then no, you can't put another lens in front of it. Simply because you need focal length to work...
  16. Exerd

    405nm Dot, Interference pattern?

    You hit that nail on the head! Except, I cannot rep you. I need to "pass more around first". ;) Wiki images show a duplicate of the beam, the center photo column, top and bottom pictures, look exactly like the dot now that I've looked again, the point at the center is dense, and the outside...
  17. Exerd

    405nm Dot, Interference pattern?

    I was using my glasses to observe the dot output of my 12X 405nm laser I made a few years ago. I noticed an interference pattern of bullseye rings within the dot at about 2 meters. At one point, I may have changed the lens. I can't remember fully if I pulled the G1 lens, but I'm thinking that...
  18. Exerd

    Long-FL 2W 445nm Build

    This is for a 5.6mm pressed diode, 445nm ~2W (2.5A) multi-mode build; I have typically used a lot of the common lenses that float around here for 9x0.5mm threaded laser optic barrels, G1, Aixiz, etc. I am planning on building a high-output 2W 445nm diode-laser in a larger 2x26650 host I found...
  19. Exerd

    Testing a High-Output Driver PCB

    Stalker, Only problem is your link to Jameco cannot yield any of the same 35A @ 1.2V rectifiers. Digikey yes, but Jameco, link is forbidden like it's an account product you linked to. I tried Jameco's search, even google on their site, but not showing any of the same part numbers (1N1190R)...
  20. Exerd

    Testing a High-Output Driver PCB

    Hah! Awesome, though. Thank you, both. I will order them, and from there, once they arrive, I will be back with results from my experiment on the driver. I'm about to go mill and turn me a nice set of adjustable spanners to get the actual driver out. Darn grounding/holding ring in there on top...




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