Lenny Lipton is a pioneer in stereoscopy and the author of Foundations of the Stereoscopic Cinema published in 1982 but nevertheless full of worthy information. The book is available for free to download at several places on the web (i.e. here) [32Mb, .pdf].
Lenny Lipton is one of the co-founders of Oculus, a new 3D startup going into analog 3D cinema.
Look at this 07:03 video on YouTube about the RealD projection system.