使用具有自动瞳距调节功能的可穿戴显示器评估眼睛反应,Optics Express

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使用具有自动瞳距调节功能的可穿戴显示器评估眼睛反应
Optics Express ( IF 3.2 ) Pub Date : 2022-02-24 , DOI: 10.1364/oe.453080
Hyoung Lee ₁ , Jung Kim ₂ , Jung-Young Son ₂ , Insup Kim ₃ , Jinhong Noh ₃ , Yong-Jin Yoon ₃ , MinSung Yoon ₁

Affiliation

在这项研究中，我们介绍了一种可自动控制用户瞳距 (IPD) 的近眼可穿戴显示器（HMD：头戴式显示器）的设计。此外，我们展示了基于提议设计的可穿戴 AR 显示器的测试台模块。调整精度和用户两眼距离匹配的观看效果都是通过用户实际佩戴模块的体验来评价的。我们证明，可以使用我们提出的一组 IR 摄像头传感器和一个微致动器模块来测量和调整左右眼瞳孔之间的距离。为每只眼睛进行机械控制的半反射镜单元旨在将投影仪显示的图像与红外摄像机拍摄的图像结合起来，从而对用户的 IPD 进行微调。红外摄像机传感器拍摄的一组图像经过实时图像处理，可以在红外光照射下高精度地确定每个瞳孔的位置。根据测量的信息，我们为测试台制造的微驱动器模块可以自动调整双目距离以适应每个观看者的 IPD。每个微执行器电机的最大移动距离为±10 mm，精度控制至少为0.5 mm。从两张红外照片中计算出用户的 IPD 大约需要 18 秒，然后才能准确调整参与者佩戴的模块的实际双眼距离。使用演示的测试台，共有 50 名受试者参与确认了自动 IPD 调整的准确性，误差为 0.25%，以及显示图像质量和 3D 沉浸式体验的改进。

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Evaluation of eye response using a wearable display with automatic interpupillary distance adjustment

In this study, we introduce a design for a near-eye, wearable display (HMD: head mounted display) that can automatically control the user's interpupillary distance (IPD). In addition, we demonstrate a test-bed module for the wearable AR display based on proposed design. Both the adjustment accuracy and the viewing effect through distance matching between the user’s eyes are evaluated by the user’s experience in actual wearing of the module. We demonstrate that the distance between the left and right eye pupils can be measured and adjusted using a set of IR camera sensors and a micro-actuator module that we proposed. A half-mirror unit to be mechanically controlled for each eye is designed to combine the image displayed from the projector and an image taken by the IR camera, leading to fine adjustment of the user’s IPD. A set of images taken by the IR camera sensors is image-processed in real time to determine each pupil’s position with high accuracy under infrared light illumination. Based on the measured information, a micro-actuator module we fabricated for the test bed can automatically adjust the binocular distance to fit each viewer’s IPD. The maximum movement distance of each micro-actuator motor is ±10 mm with precision control of at least 0.5 mm. It takes about 18 seconds to calculate the user’s IPD from two IR photographs and then to accurately adjust the actual binocular distance of the module that the participant wears. Using the demonstrated test bed, a total of 50 subjects participated to confirm the accuracy in the automatic IPD adjustment with an error of 0.25% as well as the improvement of the displayed image quality and 3D immersive experience.

更新日期：2022-02-24

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