Lightfield Research
I've been very interested in Lightfield technology ever since I visited the now defunct Lytro company here in the Bay Area. It is so disappointing that they were absorbed by Google and basically disbanded. (come on tech entrepreneurs stop giving in!) In any event I've gathered notes here, this technology has been around awhile
http://citeseerx.ist.psu.edu/viewdoc/download?doi=10.1.1.685.3118&rep=rep1&type=pdf