Another old planetarium find
Well, if you were at SELEM you've already seen it, but if not, here's a little something I recovered from a planetarium that would have been just thrown away. This is why my trip to SELEM was 2336 miles instead of the typical 900 miles! I'd like to give a big thanks to imagelight for giving me some very useful information about how this thing works. My hope, is that at SELEM 7 this will be working back stage with a pair of analog consoles. The console that came with this is primarily used for color modulation! There are 3 scan heads on the front of this thing, the 2 G-120 scan heads on the back is for color modulation and blanking. There is a fiber launcher on the breadboard, I was lucky enough to also receive what gets attached to the other end of the fiber, yet another G-120 scan head. So the way I understand it, the AOM is just used to split the beam between the 0 and 1st order beams, the G-120's handle blanking and color modulation with the help of a set of prisms. As you can see in the pic, the console is very well used, I hope to have that looking like new when I'm done with it. Anyway, enjoy the pics, if you want to see this thing running, stop by SELEM 7!This system was installed in a planetarium around 1990 and was used until about 2007.
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Originally Posted by tsteele93
Once I get the AOM up and running, it is just used to send the beam down one beam path or the other or 50/50 down both paths, there are 2 sets of prisms and G-120's for color modulation/blanking. It appears that the 1st beam path can feed all 3 scan heads and the fiber launcher, while the other beam path feeds 2 scan heads. Still lots to figure out with this thing!
Thought it was just that controller-box... Very-nice snag, Dude!...will look forward to seeing 'results' pics... 
..shyte's faaar-worse than any-smack... 
....and armed only with his trusty 21 Zorgawatt KTiOPO4...
