i've made a small planetarium, using small dome and videoprojector.
you can see the project at
sorry, it's for the moment in french. Translate in progress. But the pictures says more info.
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sorry for my poor english !
the flat triangles and seams doesn't really matter. the distortion are minor. big dome have sometime distortions.
i don't use any mirror or fisheye. The projector is standard. Infocus X1a
look at www.infocus.com
and i use the projector normaly, but the screen is not flat, it's a dome. between projector and screen: 4 meters, for 1.2 m dome.
i've calculate: for a 3.6 dome, projector-screen= 9,5 meters
i will drawing the whole assembly.
Very cool project! Thanks for showing. We'll have to link this somehow.
Nice job with the planetarium. I am also planning on building a geodesic dome for my project. I am curious about a couple of things:
Do you think the distortion of the stars due to the flat triangles and seams is annoying, or does it not really matter?
Could you possibly sketch a drawing, or show some photos on your website showing the projector and the dome? I would like to see the whole assembly. Did you use any kind of mirror, or fisheye lens with your projector?
I have been really annoying lately trying to get some sort of image warping feature added to Stellarium so images look correct projected on a dome with a mirror. Look at the thread about GNU and warped version of Stellarium. That makes two of us who are interested in building our own planetariums.
Thanks for the post and information,