Researchers propose nausea-free VR immersion at 1600fps: Page 2 of 3

January 24, 2019 //By Julien Happich
Researchers propose nausea-free VR immersion at 1600fps
A team of researchers from Carnegie Mellon University has figured out a way to render immersive 3D virtual reality images without the often dizzying and nausea-inducing side effects created by the so-called vergence-accommodation conflict, when our eyes have to focus on a fixed display despite receiving different depth cues.

Schematic of the focal-length tracking system.

Rather than trying to stabilize their focus-tunable lens at particular focal lengths (which limited previous attempts), the researchers used the device’s frequency response to its maximum, driving the lens with a high frequency triangular voltage so as to sweep the lens through its entire range of focal lengths at high speed. By measuring the actual focus length in real time (monitoring the deflection path of an IR laser beam going through the lens), they were then able to synchronize a high frame-rate display to output just the right rendered 3D image at the right focal plane.  


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