Old 03-16-2009, 04:49 AM #1
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Default RGV Lab Laser

ITS FINISHED (scroll down)

Well I finally decided it was time to join your fine forum, I have lurked on and off for a while now but more recently I just felt the urge to show off my projects to people that actually care ;D

That said, I got hooked with lasers in about '06 when I interned at a local telecom company (formerly known as bell labs, lucent, agear, and ortel, now known as emcore, and by the looks of their stock by june when I go back it will be something new) and was working in a lab doing a lot of work with lasers (not necessarily related to telecom, but still we had $2000 780nm laser diodes hooked up and beams running around) and since have been building up a collection of 1064nm pulsed lasers, a 2100nm Holmium:YAG medical laser, a few hundred watts of 808nm bars, and a few nice visible lasers, which is what this post will focus on.

Just about 2 years ago i got the idea to mix a 532nm module with a 650nm diode using the turning mirror out of a dvd-r drive, and got a reasonably well coliminated orange or yellow beam, which worked just well enough to spark my interests in mixed lasers. It was also right about then that those first ps3 sleds were avaible on ebay (a mere $80 for a whopping 10mw of 405nm!) so I took the chance to complete it into a RGV (or RGB if you shine it on a fluorescing target, which with 10mw of 405nm that was all it was good for). *But I had a number of issues relating to alignment, the aluminum plate I was using was just to thin to keep the tolerances I wanted. *So thus was born the RGV v3 *[s]But I can't post a picture of it since you guys don't seem to like newcomers ;-)[/s] *Now that I managed to waste enough time to get my 10 posts in behold:
RGB Rev 3

sorry the render isn't quite updated, that was a slightly outdated render but you get the idea


click for a larger image

Also check out *http://krazerlasers.com/images/RGB for some pictures of the new system, http://4hv.org/e107_plugins/forum/fo...php?22477.post for some information on the previous builds, and my website http://krazerlasers.com/lasers/ for more formal pages for rev 1 and 2 and solidworks renders of the rev 3 laser. *

In any case, it started out as some aluminum scrap I found at the UCSB junk pile, which I machined into 6oz of pure awesome. *As soon as get through finals week I am headed home to add in the guts (50+mw ledshoppe green laser pointer module, 150ish mw 650nm red diode, and a 100iish mw 803t diode, and dicros extracted out of dvd and blu-ray drives) and align the beast. *I am hoping for 1/3w of ballanced white, and one of these days I will get around to making an analog supply for the diodes to get a full color laser. *I am adding power sense photodiodes in the head so that I can eventually run the system closed loop (although I worry that I am going to run into issues with the green doing unfun things, we will see). *

But since it isn't a laser till it emits coherent light I used some sillyputty (yeah being stuck in a dorm sucks) to hold in the module out of a ledshooppe 50mw pointer, in and at least get a 1 color laser working for you guys. *I didn't get a chance to measure the exact power, but I measured the module at 350ma putting out 65mw, and with the boards pot turned up to 90% it was drawing about 450ma and looked about twice as bright as an unmodified module, which would imply a ton of frickin power. *There are pictures at the krazerlasers.com/images/RGB address of the beam (that shot was taken in broad daylight) and of it being focused down onto a black crock clip burning up a storm. *Not bad for a $25 laser :-o

BTW, the laser is 2.5" by 2.5" by 1" not including the mounting feet or db9 connector. it fits quite nicely in the palm of your hand :-)

Cheers guys!


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Old 03-16-2009, 04:57 AM #2
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Default Re: RGV Lab Laser Teaser (first post)

Good job on the lurking.

And if you lurked enough you'll know I'm the #1 spammer here.

So here is your first spam!

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Old 03-16-2009, 09:15 PM #3
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Default Re: RGV Lab Laser Teaser (first post)

I must be blind, 'cause I'm missing the spam in ...'s initial comment.. Seems to me that he's just trying to show us something he's building. After checking out the pics, I'd say he's done some pretty nice work!
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Old 03-16-2009, 10:50 PM #4
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Default Re: RGV Lab Laser Teaser now w/ pictures!

looks tasty, beats some of the stuff they feed us here in the dorms ;D

First post updated with images, now back to studying for that lab final in 1/2hr :
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Old 03-17-2009, 12:30 AM #5
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Default Re: RGV Lab Laser Teaser now w/ pictures!

I think he did an excellent job of lurking & building & capturing the idea in print!!! NICE JOB, DUDE!!!! Not SPAM at all IMO, but a good deal of smarts & talent. BTW, this makes POST # 800 for me WOOOHOOO [smiley=2vrolijk_08.gif]& so I sign off this #800 post with a BIG [smiley=vrolijk_26.gif] [smiley=vrolijk_26.gif] rob
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Old 03-17-2009, 12:45 AM #6
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Default Re: RGV Lab Laser Teaser now w/ pictures!

very nice machine work . the flush db9 look's sweet can't wait to see it finished
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Old 03-29-2009, 08:48 AM #7
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Default Re: RGV Lab Laser Teaser now w/ pictures!

ITS ALIVE
but the dicros I used (the turning mirror out of a dvd and blue-ray rom respectivley) are utter crap, and by the time the green makes it out I am down to about 5mw, which limits the overall power to about 20mw for a ballanced white. *But thats all I can do over this spring break (school starts monday) so hopefully over summer I will get up the guts to rebuild it with real dicros. *Also, it turns out the uv cure glue I decided on, norland optical #63, doesn't absorb the 'uv' from my uv curer at all (it honestly just looks clear!) so I had to resort to my 5 year old expired half congealed shrinks-10%-when-you-cute-it-and-then-has-the-consistancy-of-a-piece-of-chewing-gum uv cure glue. *Needless to say the results were a little subpar, and the far feild colmination isn't great (the beams do at least touch at 50ft...), but hey its 200mw of any-color-you-want laser power that fits in the palm of your hand!

So with no further delay, behold the
Krazer K106 (aka RGB Rev III)
*
lasers powered up and ready for alignment, and some aligners (a 5 axis for the mirror and a 3 axis diode, each color aligned independently)

*
aligned!

*
the beamscatter inside (check out how much power I am loosing on that poor red combiner optic!) and using a cd as a difraction grating (note that my camera doesn't pick up 405nm to save its life, so the spot looks yellow in the images)

*
the system and the power supply


The whole mess cost me about
phr sled - $20
12x red sled - $20
aixiz module - 2x $5 = $10
50mw ledsoppe green pointer = $25
power supply - $0 (junkpox parts, estimated $25 to order parts from digikey without things like 5turn precision pots)
host - $0 (machined by yours truly out of scrap aluminum, aluminum worth $5)
other junk - $0 (scavanged, estimated $20 for cables, enclosure for ps, etc)
= $65 ($125 if you had to buy everything)
Total time
Cad work - 20hrs (learnign to use SolidWorks, drew all of the modules and redesigned the case 3 times)
Maching host - 10hrs (my first machine ship project)
Preparing modules (ie, extract, set focus, etc) - 2hrs
Alignment - 8hrs (f***ing glue)
power supply = 8hrs (just a simple lm317 variable current source mounted to a piece of polycarbonate)
planning = 2hrs
= 60hrs

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Old 04-05-2009, 11:52 AM #8
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Default Re: RGV Lab Laser

Wow that's cool, this deserves a bump!
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Old 06-08-2009, 07:20 PM #9
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I'm building a rgb laser too, thanks for leting me know where to get the high powered green laser.
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Old 06-08-2009, 07:31 PM #10
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Very nice build and good lurking!
ElektroFreak and Rob, I think you missed to point in Niko's post.. try to read it again.
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