Angle of view is generally specified for the diagonal...not in halves.
And a rear of the lens element sitting 1/2 millimeter from the sensor? just imagine the manufacturing tolerances that would be needed to prevent the lens from hitting the sensor...
Sorry, folks are still grasping at straws....wanting their desires to come true! There's nothing wrong with that, but I am still calling this lens posting as bogus...
Patent speak is a language of its own, combine that with this probably being in lens designer speak, they may express things differently than photographers expect. Using half of the angle of view would be comparable to MTF charts which show performance with distance from the centre. That it is doing the same in the other direction is redundant. I don't know if there is precedent of this in other patents though, so that might be one to check if anyone has time.
The (lack of) back focus distance may be a bit different for an interchangeable lens system, but could it also be a fixed lens in a G1 X like camera?
Canon 1D, 300D IR, 450D full spectrum, 600D, 5D2, 7D, EF 35/2, 50/1.8, 85/1.8, 135/2+SF, 70-300L, 100-400L
EF-S 15-85, TS-E 24, MP-E 65, Zeiss 50/2 macro, Sigma 150 macro, 120-300/2.8 OS, Samyang 8mm fisheye