Sunburn is a phenomenon which occurs when pixels are damaged, either temporarily or permanently, as a result of direct exposure to sun radiation. Consequently the image exhibits artifacts seen as white or black spots. In this study we investigate the effect of the F/# on sunburn in VOx bolometer. The experimental setup was designed to simulate sun radiation at flight conditions. We study the sunburn intensity, its recovery time and its dependence on F/#. As part of the data analysis, we used a SNR model to characterize the sunburn intensities. A good correlation was found between the SNR model and the naked eye observation of the sunburn spots.
For many years image intensifier tubes were used for night vision systems. In 2014, Elbit systems developed a digital low-light level CMOS sensor, with similar sensitivity to a Gen II image-intensifiers, down to starlight conditions. In this work we describe: the basic principle behind this sensor, physical model for low-light performance estimation and results of field testing.
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