一个64 × 128 3D堆叠的SPAD图像传感器用于低光成像
Zhe Wang1,2, Xu Yang1,2, Na Tian1,2
1State Key Laboratory of Superlattices and Microstructures, Institute of Semiconductors, Chinese Academy of Sciences, Beijing 100083, China.
Sensors (Basel, Switzerland)
|July 13, 2024
概括
这项研究引入了一种新的64x128SPAD图像传感器,用于优越的低光成像. 它的先进设计和除算法使得在极度暗的条件下能够清晰的2D灰度成像.
科学领域:
- 光子学和传感器技术技术
- 图像处理 图像处理
- 半导体设备 半导体设备
背景情况:
- 低光照射对安全,自动驾驶和环境监测等应用至关重要.
- 单光子雪崩二极管 (SPAD) 传感器在低光条件下提供高性能.
- 现有的传感器经常在非常暗的环境中与灵敏度和噪音作斗争.
研究的目的:
- 开发和描述一个高性能64x128SPAD图像传感器,优化用于低光照相.
- 通过先进的设计技术来增强光敏度和减少噪音.
- 为了证明在极低照明条件下有效的二维灰度成像能力.
主要方法:
- 设计了一个64x128的SPAD图像传感器,利用3D堆叠架构和微镜头技术.
- 集成的紧门像素电路与厚门MOS晶体管来提高光敏度.
- 实现了可调节曝光时间的可配置数字控制电路和专门的SPAD消噪算法.
主要成果:
- 实现了非常低的暗噪声水平,平均暗计数速率 (DCR) 为 41.5 cps 在 2.4 V 过量偏差下.
- 在6 × 10-4 lux照明下成功演示了2D灰度成像.
- 传感器在低光照射下表现出色的成像性能,利用了SPAD优势.
结论:
- 开发的SPAD图像传感器显著增强了低光照明成像能力.
- 传感器的设计有效地解决了灵敏度和噪声方面的挑战.
- 这项技术显示出强大的潜力,适用于需要高性能低光视觉的各种应用.
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