[Schniapereli]

I have actually worked with a projector with a built in mirror. The mirror had a strange curve where it was like a convex U at the bottom but towards the top it would get flatter. We could project an image maybe 7 feet wide from 4 feet back, but the projection was very high from the projector. We ended up hanging it upside down and flipping the image because the screen was closer to the ground.

I am not sure what brand it was, but it was fairly interesting. I wouldn't consider it to be professional quality for a very large screen, but I thought the mirror part might be interesting.