Augmented Reality (AR) is increasingly positioned as a tool for knowledge work, providing beneficial affordances such as a virtually limitless display space that integrates digital information with the user's physical surroundings. However, for AR to supplant traditional screen-based devices in knowledge work, it must support prolonged usage across diverse contexts. Until now, few studies have explored the effects, opportunities, and challenges of working in AR outside a controlled laboratory setting and for an extended duration. This gap in research limits our understanding of how users may adapt its affordances to their daily workflows and what barriers hinder its adoption. In this paper, we present findings from a longitudinal diary study examining how participants incorporated an AR laptop -- Sightful's Spacetop EA -- into their daily work routines. 14 participants used the device for 40-minute daily sessions over two weeks, collectively completing 103 hours of AR-based work. Through survey responses, workspace photographs, and post-study interviews, we analyzed usage patterns, workspace configurations, and evolving user perceptions. Our findings reveal key factors influencing participants' usage of AR, including task demands, environmental constraints, social dynamics, and ergonomic considerations. We highlight how participants leveraged and configured AR's virtual display space, along with emergent hybrid workflows that involved physical screens and tasks. Based on our results, we discuss both overlaps with current literature and new considerations and challenges for the future design of AR systems for pervasive and productive use.

翻译：增强现实（AR）正日益被视为知识工作的工具，其提供了诸多有益的功能特性，例如将数字信息与用户物理环境相融合的虚拟无限显示空间。然而，要使AR在知识工作中取代传统的基于屏幕的设备，它必须支持在不同情境下的长时间使用。迄今为止，很少有研究探讨在受控实验室环境之外、长时间使用AR进行工作的效果、机遇与挑战。这一研究空白限制了我们理解用户如何将其功能特性适配到日常工作中，以及哪些障碍阻碍了其采用。本文通过一项纵向日记研究，展示了参与者如何将AR笔记本电脑——Sightful公司的Spacetop EA——融入其日常工作流程的研究结果。14名参与者在两周内每天使用该设备进行40分钟的工作，累计完成了103小时的AR工作。通过调查问卷、工作空间照片及研究后访谈，我们分析了使用模式、工作空间配置以及用户认知的演变过程。我们的研究结果揭示了影响参与者使用AR的关键因素，包括任务需求、环境限制、社交动态及人体工学考量。我们重点阐述了参与者如何利用和配置AR的虚拟显示空间，以及涉及物理屏幕和任务的新兴混合工作流程。基于研究结果，我们讨论了与现有文献的重合点，以及为未来实现AR系统普及化与高效化设计所需考虑的新问题与挑战。