Many augmented reality (AR) applications operate within near-field reaching distances, and require matching the depth of a virtual object with a real object. The accuracy of this matching was measured in three experiments, which examined the effect of focal distance, age, and brightness, within distances of 33.3 to 50 cm, using a custom-built AR haploscope. Experiment I examined the effect of focal demand, at the levels of collimated (infinite focal distance), consistent with other depth cues, and at the midpoint of reaching distance. Observers were too young to exhibit age-related reductions in accommodative ability. The depth matches of collimated targets were increasingly overestimated with increasing distance, consistent targets were slightly underestimated, and midpoint targets were accurately estimated. Experiment II replicated Experiment I, with older observers. Results were similar to Experiment I. Experiment III replicated Experiment I with dimmer targets, using young observers. Results were again consistent with Experiment I, except that both consistent and midpoint targets were accurately estimated. In all cases, collimated results were explained by a model, where the collimation biases the eyes’ vergence angle outwards by a constant amount. Focal demand and brightness affect near-field AR depth matching, while age-related reductions in accommodative ability have no effect.

中文翻译：

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焦距，年龄和亮度对近场增强现实深度匹配的影响

许多增强现实（AR）应用程序在近场到达距离内运行，并且需要将虚拟对象的深度与真实对象匹配。通过三个实验测量了这种匹配的准确性，这三个实验使用定制的AR软镜在33.3至50 cm的距离内检查了焦距，年龄和亮度的影响。实验一检查了准直（无限焦距）水平，与其他深度线索一致以及到达距离的中点处的焦点需求的影响。观察者还太年轻，无法显示出与年龄相关的适应能力下降。准直目标的深度匹配随着距离的增加而被越来越高估，一致的目标被略微低估了，中点目标被准确地估计了。实验II复制了实验I，与年长的观察者。结果与实验I相似。实验III使用年轻的观察者复制了具有较暗目标的实验I。结果再次与实验I一致，除了一致的目标和中点目标均被准确估计。在所有情况下，均通过模型解释了准直结果，其中准直使眼睛的发散角向外偏移一定量。焦点需求和亮度会影响近场AR深度匹配，而与年龄相关的调节能力降低则没有影响。准直结果由模型解释，其中准直使眼睛的发散角向外偏移一定量。焦点需求和亮度会影响近场AR深度匹配，而与年龄相关的调节能力降低则没有影响。准直结果由模型解释，其中准直使眼睛的发散角向外偏移一定量。焦点需求和亮度会影响近场AR深度匹配，而与年龄相关的调节能力降低则没有影响。