PBS blues.....

[Stuka]

the traditional way if you do not have a milling machine to make the platform to raise the laser is a bounce off two mirrors on mm1s to raise the height of one beam. If you use dielectric mirrors the loss is only microwatts. If you fold the beam straight up with a mirror at 45' the polarization rotates, so you do it diagonally. Ie go backwards toward the laser and to the left then forward towards the scanners and to the right. That reduces the polarization rotation to a minimum.

Steve

..I'm not a smart man, but I do know what a laser is....

So, any chance you can draw that?

[FourDee]

Here's a drawing for you.
I split the beam up into 4 parts so you can easily see what's happening
I placed the beam profile next to the beams. (the arrows indicate polarity)