Micro-energy Field
this was an Imperial form of personal shield, developed shortly after the Battle of Yavin. However, the technology was very expensive, and prohibited wide-spread use of the shield. Darth Vader provided one to the actor who portrayed Ben Kenobi on the planer Aridus. Hoping to fool Luke Skywalker into believing that the actor was the real Kenobi, he used a micro-energy field to deflect laser blasts, simulating the use of the Force.