Characterization of a Smartphone Camera's Response to Ultraviolet A Radiation
Characterization of a Smartphone Camera's Response to Ultraviolet A Radiation
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DOI：
10.1111/j.1751-1097.2012.01216.x
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发表时间：
2013-01-01
影响因子：
3.3
通讯作者：
Carter, Brad
中科院分区：
文献类型：
--
作者：
Igoe, Damien;Parisi, Alfio;Carter, Brad
作为一个更广泛的研究的一部分，使用智能手机作为太阳紫外线辐射监测器，这篇文章的特点是紫外线A（UVA; 320400 nm）的消费互补金属氧化物半导体（CMOS）为基础的智能手机图像传感器在受控的实验室环境中的响应。相机中的CMOS图像传感器具有对UVA的固有敏感性，并且尽管由于透镜和中性密度以及波长特定的带通滤波器而导致衰减，但是相对于入射辐照度的测量的相对UVA辐照度范围从380 nm处的0.0065%到340 nm处的0.0051%。此外，该传感器表现出对低强度离散UVA刺激的可预测响应，其可以使用记录的数字值与给定自动曝光时间的入射UVA辐照度的比率来建模，并且导致通常小于5%的测量误差。我们的研究结果支持智能手机可用于科学监测UVA辐射的想法。
As part of a wider study into the use of smartphones as solar ultraviolet radiation monitors, this article characterizes the ultraviolet A (UVA; 320400 nm) response of a consumer complementary metal oxide semiconductor (CMOS)-based smartphone image sensor in a controlled laboratory environment. The CMOS image sensor in the camera possesses inherent sensitivity to UVA, and despite the attenuation due to the lens and neutral density and wavelength-specific bandpass filters, the measured relative UVA irradiances relative to the incident irradiances range from 0.0065% at 380 nm to 0.0051% at 340 nm. In addition, the sensor demonstrates a predictable response to low-intensity discrete UVA stimuli that can be modelled using the ratio of recorded digital values to the incident UVA irradiance for a given automatic exposure time, and resulting in measurement errors that are typically less than 5%. Our results support the idea that smartphones can be used for scientific monitoring of UVA radiation.