Accurate measurement of virtual image distance for near-eye displays based on auto-focusing

Virtual reality (VR) and augmented reality (AR) are able to project virtual images to human eyes at a certain depth distance. This virtual image distance can be adjusted by controlling the diopter of the near-eye display. However, it is difficult to measure accurately and continuously since this vir...

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Veröffentlicht in:Applied optics (2004) 2022-10, Vol.61 (30), p.9093-9098
Hauptverfasser: Xu, Hao, Tabata, Satoshi, Liang, Haowen, Wang, Lihui, Ishikawa, Masatoshi
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Sprache:eng
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Zusammenfassung:Virtual reality (VR) and augmented reality (AR) are able to project virtual images to human eyes at a certain depth distance. This virtual image distance can be adjusted by controlling the diopter of the near-eye display. However, it is difficult to measure accurately and continuously since this virtual image distance spans a large range. In this work, we propose a method to accurately determine the virtual image distance of commercial VR/AR equipment. The measurement apparatus is built and calibrated to validate the feasibility. The focal distance of the focus-tunable lens can be automatically adjusted via a step motor by cooperating with the image sharpness analyzing program. Compared with other proposed methods, ours provides an effective means to achieve high accuracy, a wide and continuous testing range, and automatic evaluation of virtual image distance for compact near-eye displays.
ISSN:1559-128X
2155-3165
1539-4522
DOI:10.1364/ao.472931