3D is a hot topic from early 2010, after the movie 'Avator', but 3D is not new.
The first 3D display could be found as early as 1838 by Sir Charles Wheatstone, and the first 3D movie has existed in some form since the 1950s.
RnD has been attracted by the 3D technology in 1998, when he firstly watched the polarized movice in a Theme Park, with a polarized glasses. After some experience, it is found that the 3D effect could be done with 2 projectors, plus 4 pieces of polarized glass. The 3D demostration is good, however, quickly it is noticed that getting the content is the major problem for promoting 3D products, it is still true today. The solution is to build the 3D camera or 3D video recorder first.
Photo of 3D TV