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Old 06-19-2011, 09:50 AM #1
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Default RGB Laser System in acrylic box

I finally got around this weekend to complete my laser system. Built a box out of clear acrylic. The 10mm thickness proved to be quite the challenge when shaping the holes!

It's 98% complete. Just waiting for the larger galvo mirrors to arrive. Should improve the red output.
Total powers: 1650mW green, 1100mW red, 1900mW blue.
Total output after optic loses and analog modulation: 2510mW.
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RGB Laser System in acrylic box-dsc_0078.jpg   RGB Laser System in acrylic box-dsc_0079.jpg   RGB Laser System in acrylic box-dsc_0080.jpg   RGB Laser System in acrylic box-dsc_0081.jpg  


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Old 06-19-2011, 10:40 AM #2
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Default Re: RGB Laser System in acrylic box

Nice work man!!
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Old 06-19-2011, 11:46 AM #3
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Default Re: RGB Laser System in acrylic box

Very nice, Cant wait to see pics of the box while its running...
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Old 06-19-2011, 11:52 AM #4
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Default Re: RGB Laser System in acrylic box

That's really cool man.
Good Job.
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Old 06-19-2011, 11:53 AM #5
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Default Re: RGB Laser System in acrylic box

Great work!

The laser aperture warning is rather amusing when the whole box is transparent...

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Old 06-19-2011, 12:45 PM #6
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Default Re: RGB Laser System in acrylic box

Hehe.. i think its really cool, a projector where you can see the guts during normal operations. I see you had to put some beam***** to catch the leaks from the dichro's... probably good, otherwise you had 2 extra beams coming out of the front

Btw, doesn't it leak towards the ceiling? I've noticed that sometimes the galvo mirrors are a tad to small and a small about of the scan ends up as a line on the ceiling above the projector when the lid is off (or transparent in your case ).

Last edited by Benm; 06-19-2011 at 12:46 PM.
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Old 06-19-2011, 01:16 PM #7
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Default Re: RGB Laser System in acrylic box

Lookin Good
Yes there will be some amount of beamage come off the top of the galvos and go to the ceiling.
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Old 06-19-2011, 01:23 PM #8
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Default Re: RGB Laser System in acrylic box

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Originally Posted by Benm View Post
Hehe.. i think its really cool, a projector where you can see the guts during normal operations. I see you had to put some beam***** to catch the leaks from the dichro's... probably good, otherwise you had 2 extra beams coming out of the front

Btw, doesn't it leak towards the ceiling? I've noticed that sometimes the galvo mirrors are a tad to small and a small about of the scan ends up as a line on the ceiling above the projector when the lid is off (or transparent in your case ).
Yes you right. But I have a small aluminium plate on top of the galvos to stop this. Funny, it's always a nice pink beam that hits the ceiling from the red/blue leak. Hopefully the bigger mirrors for the galvos will help solve this.

My previous builds were in a metal box. Everyone always asks,"whats inside". Thought this time it'll be a good idea to make it transparent.
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Old 06-19-2011, 03:33 PM #9
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Default Re: RGB Laser System in acrylic box

I suppose bigger mirrors will help, but they probably slow the galvo's down, right?

I love the transparent construction, would nice to get some pics/videos of the unit in action. Downside would be that the risk of the beam getting out is pretty serious if something gets dislodged inside there, especially at these power levels. Guess that a matter of testing and not moving it before any demonstrations.
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Old 06-19-2011, 06:34 PM #10
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Default Re: RGB Laser System in acrylic box

looks very pretty and all that but i have concerns regarding stray beams like out the otherside of dichros etc...
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Old 06-19-2011, 07:15 PM #11
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Default Re: RGB Laser System in acrylic box

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Originally Posted by andy_con View Post
looks very pretty and all that but i have concerns regarding stray beams like out the otherside of dichros etc...
Yes, stray beams was a big concern. I took every precaution to make sure the only beam that exits the system is from the galvos.

As a licensed laser safety officer, I always comply with the regulations given to me by the Department of Health...no short cuts
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Old 06-19-2011, 07:18 PM #12
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Default Re: RGB Laser System in acrylic box

Quote:
Originally Posted by andy_con View Post
looks very pretty and all that but i have concerns regarding stray beams like out the otherside of dichros etc...
Quote:
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Yes, stray beams was a big concern. I took every precaution to make sure the only beam that exits the system is from the galvos.

As a licensed laser safety officer, I always comply with the regulations given to me by the Department of Health...no short cuts
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Old 06-19-2011, 07:26 PM #13
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Default Re: RGB Laser System in acrylic box

Quote:
Originally Posted by Benm View Post
I suppose bigger mirrors will help, but they probably slow the galvo's down, right?

I love the transparent construction, would nice to get some pics/videos of the unit in action. Downside would be that the risk of the beam getting out is pretty serious if something gets dislodged inside there, especially at these power levels. Guess that a matter of testing and not moving it before any demonstrations.
Thanks...I will post pics/vids after the galvo upgrade. Already had some fun and programmed some Scooter music to the projector.

The bigger mirrors will definitely slow my galvos down...probably to about 30kPPS ?
However, over the many years I found that slightly slower beams with good bounce mirrors+mirror balls+diffration gratings is more effective than projecting fancy animations on a wall. The public seems to get bored with animations.
Air beams are much cooler! Well, the guys in South Afica think so

I would have REALLY been concerned a fews years ago about slower galvos.....not so much anymore
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Old 06-19-2011, 10:11 PM #14
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Default Re: RGB Laser System in acrylic box

Quote:
Originally Posted by blrock View Post
Yes, stray beams was a big concern. I took every precaution to make sure the only beam that exits the system is from the galvos.

As a licensed laser safety officer, I always comply with the regulations given to me by the Department of Health...no short cuts
thats good to hear
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Old 06-19-2011, 11:55 PM #15
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Default Re: RGB Laser System in acrylic box

I'd agree on the issue with the galvo's - its only of real concern when doing projections and animations. A bit of distortion in the output will hardly be visible on the average beamshow, and i suppose the benefit of lower losses easily outweigh a drop in scanning speed.
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Old 06-20-2011, 04:48 AM #16
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Default Re: RGB Laser System in acrylic box

This is an awesome build. Cannot wait for a video.
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