compact RGB collimated unit

Light and its behaviour and properties
Tekosh
Posts: 8
Joined: Thu Jul 11, 2019 6:05 pm

compact RGB collimated unit

Post by Tekosh »

Hi All,

I don't know if this is the right thread for my question.
I'm looking for a compact RGB collimated unit which outputs a 1-inch, aligned, collimated beam.
I haven't been able to find an appropriate one. The lasers don't need to be super coherent, laser diodes work just fine.
Do you guys have any suggestions?
If you know a supplier or specific company, please send me the link.
Grayham
Posts: 49
Joined: Wed Feb 11, 2015 12:56 pm
Location: Hampshire, UK

Re: compact RGB collimated unit

Post by Grayham »

Hi,

Dave Battin on this forum and on the facebook forum is selling RGB laser engines.

This is the link to the thread on this forum,
https://holowiki.org/forum/viewtopic.ph ... 90ccec0970

You are unlikely to find anything off the shelf with a 1" output but you can expand the beam and then run it through a columnating lens.

Talk to Dave :)

Grayham
Tekosh
Posts: 8
Joined: Thu Jul 11, 2019 6:05 pm

Re: compact RGB collimated unit

Post by Tekosh »

I actually have that one. I made the laser driver myself.
It has two problems. The polarization for green is different than Red and Blue, so I will need to add a waveplate to the green which is a challenge given the super small space.
Also, the lasers are not very well aligned and in order to expand that, I will need an apochromatic telescopic stage. I'm afraid the misalignment causes me some trouble.

Do you have any solutions in mind for this?
Grayham
Posts: 49
Joined: Wed Feb 11, 2015 12:56 pm
Location: Hampshire, UK

Re: compact RGB collimated unit

Post by Grayham »

The alignment problems are beyond me though you may be able to resolve your polarisation problem by rotating the diodes in their housing if they allow it.

I suspect they are glued in but access to the diodes looks easier than the green.
holomaker
Posts: 772
Joined: Wed Jan 07, 2015 8:01 am

Re: compact RGB collimated unit

Post by holomaker »

Yes alignment is to difficult to achieve, I’ve now cut the red and green laser out of the engine housing along w collimating optics, now both red and green beams are matched, then simply combined w a dichroic...
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holomaker
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Joined: Wed Jan 07, 2015 8:01 am

Re: compact RGB collimated unit

Post by holomaker »

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holomaker
Posts: 772
Joined: Wed Jan 07, 2015 8:01 am

Re: compact RGB collimated unit

Post by holomaker »

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