光子计数探测与成像实验装置设计

光子计数探测是微弱光学辐射探测和超快速成像研究的关键技术.利用工作于盖革模式的雪崩光电二极管(APD)结合适当的驱动熄灭电路和NI-PCI高速图像数据采集卡构成实验系统硬件框架,通过Labview和VC++混合编程实现系统的数据采集处理程序和显示界面,设计建立了一套光子计数探测与成像实验装置,详细介绍了实施方案.该实验装置实现了光子计数脉冲信号的探测、处理与显示,为微弱光学辐射信号的探测与超快速成像研究提供了实验平台.

Design of Photon-counting Detection and Imaging Experimental Setup

Photon-counting detection is a key technique for detection of weak intensity light and high-speed imaging study. A photon-counting detection and imaging experimental setup was designed and built. Its structure and working principle were introduced in detail. The experimental hardware was composed of Avalanche Photodiode (APD) arrays, suitable driving and quenching circuits and NI-PCI high speed data acquisition card. System software and data acquisition display interface were programmed with Labview and VC++ combination. Weak photon irradiated on the avalanche photodiode which works on Geiger mode was collected by high speed data collection card continuously and processed with personal computer software. Finally, the photo-counting pulse image was acquired by this system. The experimental setup provides a powerful tool for very faint luminescence detecting and high-speed imaging study.