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FrozenGate by Avery

4 diodes better than 1. DIY Array on the cheap

In order to make that work you'd have to have multiple FLAT surfaces on your cone.  You can visualize what is happening by shining your laser onto a leadlight chrome case.  Do you get a beam reflected or do you get an arc of light that is no longer anywhere close to a beam?  You get an arc.  

In order to make it work you need flat surfaces and even that isn't going to give you a completely combined beam.  (but pretty damn close)  Check out this thread over at Photonlexicon where they actually have designed specifically one of the "axicons"

Here

Up a few posts you'll see examples of what the "dot" would look like.
 





That looks like some insane power there :o imagine that shit on a portable casing
 
Unfortunately, its easier said than done. When 4 seperate beams enter the optics, you will always get 4 out. I believe the idea is to live with this problem, but get the beams closer together in paralell. So essentially you still have 4 beams in the final output, but they are so close together, they behave as one.

The cube used in the setup (pending) somehow eliminates the difficulty in bringing them together, but id imagine they still remain as 4 seperate beams tightly paralelled.

To see this behavior up close, take two diodes with raw output, and no focusing lens on the end of the modules. Place them close together and power them up. Now put a larger collimating lens infront of the both of them. Voila! lol, two seperate beams >:(

They will always remain as seperate beams, travelling on their own paths. Ive tried many optics in the past to try and achieve this. Ive tried the above with two modules side by side, focused them down together, placed an expander in the path and them collimate again after the expander. Guess what, two beams again  >:(

If there is one thing ive learned in my time trying different things, is that to get more power, mainly by combining, things become very tricky. Combining of different wavelengths is much easier than this, and is a good start to begin understanding.


@ suiraM-

That is an interesting idea, though it sounds equally as involved as the route ive chosen. Do you by any chance have a crude sketch or diagram to aid and illustrate the proceedure? I'd like to give this one a try as well, but would expect the losses to be a bit more than my current arrangement.

I had thought of trying a diffraction gratting, but hadnt put much time in the idea. The problem with BR that I also see for this, would be the absorbtion of the gratting material itself, but may be wrong.

I cant picture this arangement in my head, but if you can post a pic, im sure things will become much clearer.

As usual, all input is welcome  ;D



And Merry Christmas to all :)
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this is not true, how do you think arctos do theirs?

technics_thomas_at_work_2.jpg
 
Question:
Say for instance you were trying to run all the diodes from one driver. Couldn't you use one of the circuits in the LM117 data sheet? See below.

I'm not sure what you are trying to do, but just thought I would bring it up.

edit: D'OH! Errrors!
 

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What are these?
 

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they combine 50 beams into one beam.

you focus all the beams into a single point then add another lens to produce a single beam
 
andy_con said:
they combine 50 beams into one beam. you focus all the beams into a single point then add another lens to produce a single beam
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Hey I have a box full of interchangeable focal lens from a old cheap Kodak camera. Would these be of any use on a project like this?
 
umm possibly.

you need optics designed for 650nm, if not you will get a very big loss
 
Oh I can see they combine them all... what I mean is, who is the manufacturer and what is the model/part number. If its custom made... where are the blueprints? :D
 
Hemlock Mike said:
Ref ---

You may be right in that --- I only remember their attempts at Greek Fire!

Mike
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Wasn't that the Byzantines?
 
This is a great idea to get cheap power out of Blu-Ray diodes. If you used some beamsplitters from KES-400A sleds to combine the beams of 4-6 PHR-803T diodes, and arranged them perfectly, you could have a single 405nm beam going at 500mW! Imagine such a high-power Blu-Ray beam... I'm drooling.
 
pianoman2011 said:
This is a great idea to get cheap power out of Blu-Ray diodes. If you used some beamsplitters from KES-400A sleds to combine the beams of 4-6 PHR-803T diodes, and arranged them perfectly, you could have a single 405nm beam going at 500mW! Imagine such a high-power Blu-Ray beam... I'm drooling.
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No-no-no-no.

You've got it ALL wrong.
What you need is ten 6x's running at 200mw and then combine them now thats somthing to drool at I mean who wouldn't two WATTS of Blue-Ray.
 
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