A vergence accommodation conflict-free virtual reality wearable headset

When using a Virtual Reality Headset (VRH), fatigue headaches or even sight issues can quickly happen. In this article we present an optical design made for a Virtual Reality Headset that is free of any Vergence Accommodation Conflict (VAC) while still small enough to be worn. As we solve the VAC, the optical design is kept simple by moving the screen from the object focal point, sending the virtual image at infinity, to another point closer to the optics, bringing the virtual image at a selected distance. Although this solution was proven efficient in [1], they only studied a proof of principle and did not work on the optical design, so our work mainly consisted in the optimization of a wearable virtual reality head set.