http://filmtvindustry.suite101.com/article.cfm/how_3d_movies_work_with_digital_technology
http://www.obsessable.com/feature/the-third-dimension-how-3d-movies-work/
http://www.wired.com/gadgetlab/2009/12/3d-movies/
http://www.3dglassesonline.com/how-do-3d-glasses-work/