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在点位移测量中的量化噪声表征:CCD在精度和动态范围方面超过了桶和象限探测器
Optics express
|November 11, 2025
概括
量化噪声限制了测量的精度. 与桶探测器 (BD) 和象限探测器 (QD) 相比,电荷合装置 (CCD) 方案提供了更高的位移分辨率和线性动态范围,用于精确的低频信号测量.
科学领域:
- 计量学和测量科学 计量学和测量科学
- 光学传感技术的技术
- 信号处理和噪声分析
背景情况:
- 点位移测量技术 (SDMT) 对于精确测量至关重要,但它们的性能通常受到噪声的限制.
- 来自模拟数字转换器 (ADC) 的量化噪声是SDMT中显著的,不可抑制的噪声源,影响了测量准确性.
- 了解不同类型探测器对噪声的影响对于推进精确测量能力至关重要.
研究的目的:
- 在量子化噪声约束下建模和系统分析不同点位移测量技术在量子化噪声约束下的性能.
- 为了比较水桶探测器 (BD),象限探测器 (QD) 和电荷合装置 (CCD) 的位移分辨率 (rΔ) 和线性动态范围 (LDR).
- 确定最优的探测器方案以进行精确的测量,特别是对于受到量子化噪声影响的低频信号.
主要方法:
- 使用BD,QD和CCD配置测量点位移的理论模型的开发.
- 对每个检测器类型的位移分辨率 (rΔ) 和线性动态范围 (LDR) 的系统分析.
- 通过模拟数字转换器 (ADC) 引入的量子化噪声的特定约束下性能评估.
主要成果:
- 与桶探测器 (BD) 和象限探测器 (QD) 方法相比,电荷合装置 (CCD) 方案显示了显著更高的精度和更广泛的线性动态范围.
- 量化噪声被确定为一个关键的限制因素,影响所有测试方法中可实现的位移分辨率和动态范围.
- CCD的卓越性能使其特别有利于需要高精度测量低频信号的应用.
结论:
- 基于电荷合装置 (CCD) 的点位位移测量技术在量子化噪声受到限制时,在精度和线性动态范围方面提供了卓越的性能.
- 该研究强调了模拟数字转换器 (ADC) 量子化噪声对测量准确性的关键影响.
- 对于在量子化噪声下精确测量低频信号,CCD方案是相对于BD和QD方法的推方法.
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