| 瞬态成像模式下高帧频CMOS图像传感器性能研究 |
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| 引用本文： | 严明,白琼,李刚,李斌康,杨少华,郭明安,张雪莹.瞬态成像模式下高帧频CMOS图像传感器性能研究[J].红外与激光工程,2022,51(8):20210694-1-20210694-9. |
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| 作者姓名： | 严明 白琼 李刚 李斌康 杨少华 郭明安 张雪莹 |
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| 作者单位： | 西北核技术研究所，陕西 西安 710024 |
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| 基金项目： | 国家自然科学基金（11475138，11775179） |
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| 摘 要： | 高帧频CMOS图像传感器具有集成度高、帧频高、功耗低、抗干扰抗辐照能力强等特性，在科学实验中应用广泛。为提高外同步触发瞬态成像模式下的成像性能，首先介绍了基于高帧频CIS(5T像素，超大快门)的瞬态成像系统构成及其工作模式；从像素结构出发，对该款CIS在不同工作模式下的成像性能进行了理论分析；搭建了基于EMVA1288的标准化测试平台，对瞬态工作模式下的多项关键性能指标进行了测试，并与稳态工作模式下的性能进行了对比。分析结果表明:与稳态工作模式相比，瞬态成像模式下图像传感器具有更大的暗本底和固定模式噪声，但传感器的时序噪声、光响应非均匀性优于稳态工作模式，具有更高的信噪比和动态范围，与理论分析基本吻合。测试分析结果可用于指导科学成像系统设计与性能优化。
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| 关 键 词： | 高帧频CMOS图像传感器 瞬态成像 性能分析 响应非均匀性 |
| 收稿时间： | 2021-09-19 |
Study on the performance of high-speed CMOS image sensors in transient imaging mode |
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| Affiliation: | Northwest Institute of Nuclear Technology, Xi’an 710024, China |
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| Abstract: | High-speed CMOS image sensors (CISs) have the advantages of high integration, high frame rate, low power consumption, and radiation difficulty. It is widely used in scientific experiments. When used in image measurement and diagnosis, CIS usually works at a synchronized mode triggered by an external signal. This mode, called the transient imaging mode, is quite different from the continuous imaging mode in which the sensor outputs images frame-by-frame at a specific frame rate. In this paper, the performance of a high-speed CIS that has 5T pixels and a global shutter is analysed in transient imaging mode, and the key performance of the sensor is tested using an EMVA1288 compatable device and compared with continuous imaging mode. The results show that in transient imaging mode, CIS has a larger dark current and a lower signal-to-noise ratio and dynamic range. However, the temporal readout noise and photo response nonuniformity are better. The test results could be used in scientific imaging system design and performance optimization. |
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