Abstract
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.
Highlights
CMOS image sensors (CISs) have evolved rapidly in recent years, taking advantage of the reduction in the transistor size
Common CISs have lower cost, higher spatial resolution, lower dark current and higher reliability, and nuclear radiation damage is acceptable in the specific low dose rate environment [8,9,10,11]
Analysis of nuclear radiation degradation of common CMOS camera can provide important evidence for design and selection of camera applied in radiation field
Summary
CMOS image sensors (CISs) have evolved rapidly in recent years, taking advantage of the reduction in the transistor size. Analysis of nuclear radiation degradation of common CMOS camera can provide important evidence for design and selection of camera applied in radiation field. It is necessary to analyze nuclear radiation degradation of common CMOS camera. Have studied the DD damage in the CISs induced by proton radiation [12]. Have studied the progressive damaging of the CISs without radiation hardening [13]. The degradation of the image is observed and recorded by radiation experiments. Based on data analysis using MATLAB, we investigate the degradation results. MATLAB, investigate results process and process of data the tested camera bywe damage, the anddegradation the SNR versus theand dose rates of is the tested camera induced by damage, and the SNR versus the dose rates is reported. The output data analysis of the output data of HD the camera for the users of the camera in theanalysis radiation of the camera for the users of the camera in the radiation field
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