Smog's 'not quite so' monster(ette) RGY(B) re-build :)

[smogthemog]

I have a little bit of a dilemma - I am in the process of fixing my 3 laser heads to my base plate, 10mm thick ally. I have marked out and drilled for the heads so they are all parallel to each other and to one edge of the base plate.
When I came to run the lasers, the output beams from them all are all at different heights when projected onto the other end of my shed wall 3M away.
At the laser output appetures they are all at fairly similar heights. The 473 seems to be the one closest to true in reguards the the base plate. The 532 is very high and the 635 is low.

Does this matter at all or can it all be corrected with dichro mounts with dichros/HR mirrors?

I have spent a few hours this afternoon trying to equal them all out and getting a little fustrated in whether I was actually wasting my time.

I am guessing that I should work from the 635 beam path (middle laser head), with it being the lowest beam on the end of the shed, so that the front dosen't have to be lifted at all, and adjust the 532 and 473 to be as parallel to that as possible in all planes?

As you can see from the first photo below, the 532 is rather pitched up at the back to enable the beam path to match the 635.

Any help will be appreciated

[andy_con]

this is why i use the 3x mirror and 3x dichros approach.

hope you get it sorted jim

[smogthemog]

Why Andy, I don't understand?


Just to add, the scan set will sit center of the base plate at the front and the beams will be combined and steered, looking from the front, around to the right hand side of the projector and back to the center at the front to hit the scnners.

[andy_con]

well for the very reason you have just posted beam heights.

so my prefered way is to bounce all 3 lasers into mirros then into dichros.

that was i never ever have to worry about beam heights

[allthatwhichis]

well for the very reason you have just posted beam heights.

so my prefered way is to bounce all 3 lasers into mirros then into dichros.

that was i never ever have to worry about beam heights

Karl has a very good post with pictures about his projector's bounce mirror solution to this dilemma.

[Banthai]

hehe you beat me to it ... i was just finding out where the photo was ....

well here ya go ....

with this layout you dont have to worry about the lasers hight or angle

and takes about a minute yo get perfect alignment










all the best .... Karl

[smogthemog]

No Picture Karl

[Banthai]

strange i can see 2 picys


can anyone else see them ?

[andy_con]

fail karl .

[smogthemog]

I have got them about right after a lot of fiddling and will go from there.
I will have a 3 way mount with a dichro/HR mirror in front of each laser output so I should be able to get perfect alignment.

Yes?