Search results

Well, here's the deal, when I was checking the threshold current the first time, I was using a smaller heatsink than a big block of aluminum. As the device gets hotter, the current (voltage) required for lasing increases. Each diode has it own idea about what the threshold is. A row of six...

An update on NUBM34 lasing thresholds: The diode lasing current thresholds were tested, one row at a time, to minimize heating. (and mistakes) For heat sinking purposes, the module is clamped to a 14 pound aluminum block. For each row, current was increased until lasing was observed, the number...

I should have qualified that number. My recollection is that the NUBM31 spec is 220 to 420 mA, I do not know whether this is relevant. I found that the lasing threshold varied. 430 mA is the current at which all the diodes in the row were lasing. I guess I had better measure the turn on...

Re: Nichia NUBM34 115W 455nm Voltage vs current graph: This is rather elementary, but so am I. I have to extra careful to avoid blowing stuff up; direct current only. Having no current / voltage graph for the NUBM34, I decided to make one. A couple of areas have wiggly artifacts, due to...

To clarify matters a bit: (Don't believe the pictures.) The device I purchased on ebay was listed as NUBM34T. The product label is NUBM34: On eBay and AMAZON, pictures don't always match the product offered. The had caused me some WTF moments now and again. The pictures I posted on the 445nm...

A mimetic polyalloy would help. Else, a rotating bowl containing a ~room temperature liquid alloy, GalinStan, or something; mercury being politically incorrect.

OFF TOPIC WARNING Certainly, you are correct with respect to black powder and TNT, also. The material in question was "a Stick of Dynamite," however. Dynamite is a formulation, the most basic type is sawdust and nitroglycerine. Tri-Nitro Toluene is a different chemical. Dynamite does not contain...

Very cool, oh the possibilities... They could all be put unto a 4x6 array, and then pretend that they are a big NUBM34! 😁

I have been thinking that beam expansion or expanding expanded beams would be interesting/instructive. Too, it is best to avoid implying or demonstrating capabilities which might be considered not constructive or politically incorrect. I get the idea although I can't quite visualize the...

I understand the concern, but the many warnings should be sufficient for anyone not aspiring to a Darwin Award. " If you try this at home, you will probably die " is really easy to understand. Your point is taken, in any case. Not to worry, lasing a Stick of Dynamite would not cause it to...

AH, yes, thank you for that. I watched Drake's video about 2 weeks ago. I then, noticed on eBay that the NUBM34T is available. I was powerless to resist. I'm aware that beam combining is difficult, but there are a number ways to get them quite close. I can think of many applications which don't...

Got Dramamine? The lens was idle, and looking for something to do. The laser source @ $3.05/ watt, was fatal attraction, or something. I had no choice. They had no choice. I'll write when I get a clue. :p

Thank you muchly for your comments, Frau Blücher, or is it Dr. Venn? You think you're confused? You outta see it from here!! Rather than babble on over stuff about which I know { } I'll just leave this here: Out of focus looks cool anyhow. no gang lenses One big ass lens (you probably knew...

I hate beam breakout. The whole idea makes me break out in a cold sweat! That projector is a very cool device, I bet it's cheap too ... NOT Is there a source for info on what is inside? Re: The goal, something half way useful which is so simple that a cave man can do it.

Oh, fie fie! Certainly not. It takes time to figure out which ideas are naive and useless. This stuff just arrived from the aether and is not even half baked. Perhaps a few more lenses are necessary, nothing fancy. There are still bridges to burn – just have not arrived at them yet. Certainly...

~ Four knife edges, one lens, maybe: ~ (effort: 20%)

One would need to be far enough away as to give a good head start, in the event that it does not go well.

L. Superglue, I believe I understand what you want. Yes, I think I can do that. What I can do more quickly is put a scale on the short axis image. It looks like the length is about ~2.5" or 63mm. For better results, I will need to set up a different arrangement and get some more images. lt will...

How much. do you suppose, could one charge for a "LASER HAIRCUT" ??

I have no specifications or dimensions, but I can measure the beam thermal print: This could be the theory of the "quick and dirty" approach. It is important to recognize when 80% yield is adequate. Also, is has been said that: "Good enough is the enemy of better." In short, yes, I agree. :)...