Lunera Lighting, Redwood City, California, USA.
J Occup Environ Hyg. 2012;9(3):140-8. doi: 10.1080/15459624.2011.648569.
Ultraviolet germicidal irradiation (UVGI), 254 nm UV-C, is increasingly used as an infection control strategy to reduce the spread of airborne pathogens such as tuberculosis (TB), influenza viruses, and measles. With the appearance of multidrug-resistant TB and emerging infectious disease such as severe acute respiratory syndrome (SARS) and H1N1 influenza viruses, engineering controls using 254 nm UV-C lamps within specialized luminaires, herein designated UVGI fixtures, are being installed in high-risk settings such as homeless shelters, hospitals, jails and prisons, and schools. Studies have established that a relatively uniform spatial distribution of UV-C in the upper room can effectively cleanse the air of aerosolized pathogens. However, for planning purposes, the placement of multiple UVGI fixtures in a space, to achieve uniformity of UV-C energy distribution using currently available lighting software, is not yet practical because no industry-wide standard method exists for radiometric measurement of commercial UVGI fixtures. In this article, standard methods for photometry and reporting of general fluorescent lighting luminaire photometric data are adopted to provide UVGI fixture spatial emission distribution data in an electronic file format. The ultimate expectation of the authors is that the results will lead to a software program for fixture placement, comparable to and as easy to use as the corresponding software used for general interior lighting applications. To accomplish this goal, a radiometry measurement system is developed to obtain the radiant intensity distributions of UVGI fixtures in a three-dimensional space. This system includes a moving-mirror Type C goniometer, a mirror, a radiometer, a desktop computer, the mechanical control hardware, and the data acquisition/presentation software. Repeated measurements were made on each of three exemplary UVGI fixtures, and measurement variation did not exceed ± 2.0%.
紫外线杀菌照射（UVGI），254nm 的 UV-C，越来越多地被用作感染控制策略，以减少空气传播病原体（如结核病（TB）、流感病毒和麻疹）的传播。随着多药耐药结核病的出现以及严重急性呼吸系统综合征（SARS）和 H1N1 流感病毒等新发传染病的出现，在无家可归者收容所、医院、监狱和学校等高风险场所，正在安装使用 254nm UV-C 灯的工程控制措施，这些灯专门安装在灯具内，称为 UVGI 灯具。研究已经证实，在上部房间内相对均匀的 UV-C 空间分布可以有效地清除空气传播的病原体气溶胶。然而，为了规划目的，在一个空间中放置多个 UVGI 灯具，以使用当前可用的照明软件实现 UV-C 能量分布的均匀性，目前还不可行，因为目前还没有针对商业 UVGI 灯具的辐射测量的行业标准方法。在本文中，采用光度学和一般荧光灯具光度数据报告的标准方法，以电子文件格式提供 UVGI 灯具空间发射分布数据。作者的最终期望是，这些结果将导致一个灯具放置软件程序，类似于且易于使用的一般室内照明应用的对应软件。为了实现这一目标，开发了一个辐射测量系统来获取三维空间中 UVGI 灯具的辐射强度分布。该系统包括一个移动镜 C 型测角仪、一个镜子、一个辐射计、一台台式计算机、机械控制硬件和数据采集/演示软件。对三个典型的 UVGI 灯具中的每一个都进行了重复测量，测量变化不超过±2.0%。
