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A 018- 22m CMOS Array Sensor for Integrated Time-Resolved Fluorescence Detection
设计用于集成时间分辨荧光检测的CMOS传感器阵列
64-by-64阵列,光子密度低至56 photons/cm²,响应时间优于800 ps
CMOS传感器时间分辨荧光光子检测差分像素荧光寿命成像
▸创新点1:差分像素设计(电路创新) - 采用差分像素结构有效抑制共模噪声,提升信噪比,实测脉冲响应时间优于800 ps,显著提高了时间分辨荧光检测的精度。
▸创新点2:低光子密度检测(系统创新) - 通过64点平均技术实现极低光子密度检测(低至光子/cm²量级),扩展了传感器在微弱荧光信号环境下的应用范围。
▸创新点3:快速响应时间(电路创新) - 优化像素电路与时序控制,实现亚纳秒级(<800 ps)响应速度,满足高帧率荧光寿命成像显微镜(FLIM)的实时性需求。
▸创新点4:集成化阵列架构(系统创新) - 64×64有源CMOS阵列将传感与处理功能集成于单芯片,支持时间门控荧光光谱分析,简化了系统复杂度并降低成本。
Abstract
This paper describes the design of an active, inte-
grated CMOS sensor array for fluorescence applications which
enables time-gated, time-resolved fluorescence spectroscopy.
The 64-by-64 array is sensitive to photon densities as low as
/56
/56
/49/48/54photons/cm/50with 64-point averaging and, through
a differential pixel design, has a measured impulse response of
better than 800 ps. Applications include both active microarrays
and high-frame-rate imagers for fluorescence lifetime imaging
microsco