I’ve noticed in working on this project that the films as they appear on the disc are mathematically closer to 2.28:1 ratio. I’ve read that a number of films including the 97 LDs we actually 2.28 and not 2.35 when placed on disc.
To quote the LaserDisc Database:
For unknown reasons - and making a mockery of the THX LD programs so-called “standards” - the Special Edition transfers in this box set have incorrect aspect ratios. Star Wars is only 2.21:1, instead of the correct Panavision ratio of 2.39:1, while Empire and Jedi’s aspect ratios are both 2.28:1 - better than Star Wars, but still short of the original Panavision framing.