Author Topic: lens needed for laser?  (Read 8795 times)

galactron

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lens needed for laser?
« on: May 20, 2015, 12:30:59 AM »
I got an RGB Laser from ebay, and it doesn't seem perfectly focused.  This is what it looks like when the red laser is shined at a wall:


This is my setup:


Is there some kind of lens I need to focus the beams?  If so, does anyone have suggestions of what to use or look for?

Thanks!
« Last Edit: May 20, 2015, 12:33:09 AM by galactron »

Macpod

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Re: lens needed for laser?
« Reply #1 on: May 20, 2015, 06:49:11 PM »
Hi galactron,

Your case design thus far looks very clean!

I have used both the TTL and "Analogo" version of that laser module. You should not need a lens and it most certainly should not look like that.

Is it reflecting incorrectly off the galvo assembly? If you point the laser module directly at the wall vs off the mirrors does it still look odd?

If not it is likely:
1. The laser module was not focused properly
2. It was jostled around during shipping

I had to correct one of mine because the green laser was not focused properly and was mis-aligned. The build quality of these internally is pretty shoddy.. they used a piece of cardboard as a shim for the green laser diode holder   ::)