21 May 2018 Varifocal technologies providing prescription and VAC mitigation in HMDs using Alvarez lenses
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Abstract
We present a varifocal system for generating consistent accommodation cues and providing prescription correction in Virtual Reality Head-Mounted Displays (VR HMDs). The proposed approach mitigates the Vergence-Accommodation Conflict (VAC), a fundamental cause of discomfort in today’s VR, and eliminates the need for corrective eyeglasses inside head-mounted displays. We augment traditional objective lenses with a focus-adjustable optical system based on Alvarez lenses, and demonstrate a proof-of-concept integration into a commercial mobile VR headset. This paves the way to lighter, thinner, and more comfortable headsets, enabling the prolonged use of VR with minimal visual discomfort.
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R. E. Stevens, D. P. Rhodes, A. Hasnain, P.-Y. Laffont, "Varifocal technologies providing prescription and VAC mitigation in HMDs using Alvarez lenses", Proc. SPIE 10676, Digital Optics for Immersive Displays, 106760J (21 May 2018); doi: 10.1117/12.2318397; https://doi.org/10.1117/12.2318397
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