Centre for Ecology and Conservation, University of Exeter, Penryn Campus, Treliever Road, Penryn, Cornwall TR10 9FE, UK.
J Exp Biol. 2023 Jul 1;226(13). doi: 10.1242/jeb.245416. Epub 2023 Jul 12.
Spectroradiometry is a vital tool in a wide range of biological, physical, astronomical and medical fields, yet its cost and accessibility are frequent barriers to use. Research into the effects of artificial light at night (ALAN) further compounds these difficulties with requirements for sensitivity to extremely low light levels across the ultraviolet to human-visible spectrum. Here, I present an open-source spectroradiometry (OSpRad) system that meets these design challenges. The system utilises an affordable miniature spectrometer chip (Hamamatsu C12880MA), combined with an automated shutter and cosine-corrector, microprocessor controller, and graphical user interface 'app' that can be used with smartphones or desktop computers. The system has high ultraviolet sensitivity and can measure spectral radiance at 0.001 cd m-2 and irradiance at 0.005 lx, covering the vast majority of real-world night-time light levels. The OSpRad system's low cost and high sensitivity make it well suited to a range of spectrometry and ALAN research.
光谱辐射测量是生物学、物理学、天文学和医学领域中非常重要的工具，但由于其成本和可及性问题，它的使用经常受到阻碍。对人造光污染（ALAN）的研究进一步增加了这些困难，因为需要在紫外线到人类可见光谱范围内对极低光水平的敏感性。在这里，我提出了一种开源光谱辐射测量（OSpRad）系统，该系统满足了这些设计挑战。该系统利用了一种价格实惠的微型光谱仪芯片（滨松 C12880MA），结合了自动快门和余弦校正器、微处理器控制器，以及可以与智能手机或台式计算机一起使用的图形用户界面“应用程序”。该系统具有高紫外线灵敏度，可以测量 0.001 cd/m-2 的光谱辐亮度和 0.005 lx 的辐照度，涵盖了绝大多数实际夜间光照水平。OSpRad 系统的低成本和高灵敏度使其非常适合各种光谱学和 ALAN 研究。
