A method for measuring virtual image distance in head-mounted display using the variable focus optics

Shuangjiang Huang; Lihui Wang; Yutao Huang; Yuan He; Shi Bai

doi:10.1117/12.3035961

20 November 2024 A method for measuring virtual image distance in head-mounted display using the variable focus optics

Shuangjiang Huang, Lihui Wang, Yutao Huang, Yuan He, Shi Bai

Proceedings Volume 13241, Optical Metrology and Inspection for Industrial Applications XI; 132410V (2024) https://doi.org/10.1117/12.3035961
Event: SPIE/COS Photonics Asia, 2024, Nantong, Jiangsu, China

Abstract

Head-mounted displays (HMDs) require precise measurement of virtual image distance for user comfort, but this is challenging due to dynamic variations. This paper addresses the difficulty by proposing a prototype using a variable-focus liquid lens and a calculation model for virtual image distance. We developed an experimental platform to validate the method and introduced an optimization algorithm to find the optimal focal length for maximum sharpness. Results showed a distance error of about 5 cm, confirming that our method accurately measures virtual image distance in HMDs, with potential applications in virtual and augmented reality.

(2024) Published by SPIE. Downloading of the abstract is permitted for personal use only.

Citation Download Citation

Shuangjiang Huang, Lihui Wang, Yutao Huang, Yuan He, and Shi Bai "A method for measuring virtual image distance in head-mounted display using the variable focus optics", Proc. SPIE 13241, Optical Metrology and Inspection for Industrial Applications XI, 132410V (20 November 2024); https://doi.org/10.1117/12.3035961

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