Wearable device for measuring pupilar illuminance

Abstract Data on the exposure of the human eye to light can help researchers and design professionals to better understand building performance with regards to the well-being and health of users. However, technologies currently used to evaluate indoor lighting conditions from a fixed point of view and measure luminous quantities are unable to map out visual scenes in a similar way to the human eye. With the aim of contributing to overcome this gap, this paper presents "OcuLux", a wearable device made in Brazil, designed to continuously monitor pupilar illuminance for indoor environments. "OcuLux" was calibrated and the sensor was worn for 7 days in November 2016 at the Solar Energy and Building Physics Laboratory (LESO-PB) at École Polytechnique Fédérale de Lausanne (EPFL) Lausanne campus (Switzerland), under partly cloudy and overcast skies to diagnose the light dose received by a person performing typical office activities. The results showed that no significant differences were found between the light dose received in the morning and in the afternoon. Although "OcuLux" has a limited measuring range, its use in a real situation has indicated that it is reliable for measurements of pupilar illuminance.

摘要 人眼光照暴露相关数据可助力研究人员与设计从业者更深入地理解建筑在使用者健康与福祉层面的性能表现。然而，当前用于从固定视角评估室内光照环境并测量光量参数的技术，无法以类似人眼的方式还原视觉场景。为填补这一研究空白，本文提出了一款产自巴西的可穿戴设备「OcuLux」，其专为室内环境设计，可持续监测瞳孔光照度（pupilar illuminance）。2016年11月，研究团队将完成校准的「OcuLux」传感器佩戴于瑞士洛桑联邦理工学院（EPFL）洛桑校区的太阳能与建筑物理实验室（LESO-PB），在多云及阴天天气条件下开展了为期7天的测试，以记录从事典型办公活动的人员所接收的光辐照剂量。测试结果显示，受试者上午与下午接收的光辐照剂量无显著差异。尽管「OcuLux」的测量范围有限，但实际场景应用结果表明，其在瞳孔光照度测量中具备可靠性。