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首页> 美国卫生研究院文献>Sensors (Basel Switzerland) >Nuclear Radiation Degradation Study on HD Camera Based on CMOS Image Sensor at Different Dose Rates
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Nuclear Radiation Degradation Study on HD Camera Based on CMOS Image Sensor at Different Dose Rates

机译：基于不同剂量率的CMOS图像传感器的高清摄像机核辐射降解研究

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摘要

In this work, we irradiated a high-definition (HD) industrial camera based on a commercial-off-the-shelf (COTS) CMOS image sensor (CIS) with Cobalt-60 gamma-rays. All components of the camera under test were fabricated without radiation hardening, except for the lens. The irradiation experiments of the HD camera under biased conditions were carried out at 1.0, 10.0, 20.0, 50.0 and 100.0 Gy/h. During the experiment, we found that the tested camera showed a remarkable degradation after irradiation and differed in the dose rates. With the increase of dose rate, the same target images become brighter. Under the same dose rate, the radiation effect in bright area is lower than that in dark area. Under different dose rates, the higher the dose rate is, the worse the radiation effect will be in both bright and dark areas. And the standard deviations of bright and dark areas become greater. Furthermore, through the progressive degradation analysis of the captured image, experimental results demonstrate that the attenuation of signal to noise ratio (SNR) versus radiation time is not obvious at the same dose rate, and the degradation is more and more serious with increasing dose rate. Additionally, the decrease rate of SNR at 20.0, 50.0 and 100.0 Gy/h is far greater than that at 1.0 and 10.0 Gy/h. Even so, we confirm that the HD industrial camera is still working at 10.0 Gy/h during the 8 h of measurements, with a moderate decrease of the SNR (5 dB). The work is valuable and can provide suggestion for camera users in the radiation field.
机译：在这项工作中，我们用钴60伽玛射线辐照了基于商用（COTS）CMOS图像传感器（CIS）的高清（HD）工业相机。除镜头外，被测照相机的所有组件均未经辐射硬化处理。在偏置条件下以1.0、10.0、20.0、50.0和100.0 Gy / h进行高清摄像机的辐照实验。在实验过程中，我们发现被测试的相机在辐照后显示出明显的退化，并且剂量率不同。随着剂量率的增加，相同的目标图像变得更亮。在相同剂量率下，亮区的辐射效应低于暗区。在不同的剂量率下，剂量率越高，在明暗区域中的辐射效果就越差。并且明暗区域的标准偏差变得更大。此外，通过对捕获图像进行逐步退化分析，实验结果表明，在相同剂量率下信噪比（SNR）与辐射时间的衰减不明显，并且随着剂量率的增加，退化越来越严重。另外，在20.0、50.0和100.0 Gy / h时SNR的降低速率远大于在1.0和10.0 Gy / h时的SNR降低速率。即使如此，我们确认高清工业摄像机在8小时的测量过程中仍以10.0 Gy / h的速度工作，并且SNR略有下降（5 dB）。这项工作很有价值，可以为辐射领域的相机用户提供建议。

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