基于ICCD光子计数的滤光片透过率测试-红外技术.PDFVIP

第39 卷 第8 期 红 外 技 术 Vol.39 No.8 2017 年8 月 Infrared Technology August 2017  基于 ICCD 光子计数的滤光片透过率测试 陈 群，徐 欣，王镇窑，钱芸生 （南京理工大学电子工程与光电技术学院，江苏 南京 210094 ） 摘要：针对光经深截止滤光片衰减后，达到光子计数水平，其透过率难以用一般测量仪器测出的情 况，设计了基于ICCD 的光子计数成像系统，介绍了系统的工作原理，硬件组成和图像处理所涉及 到的软件算法，给出了利用单位时间内透过的光子数计算透过率的计算方法，并对一给定的日盲滤 光片进行了透过率测试。在特定波长范围内，测试结果的数值相对实际情况偏小，测试结果的数量 级与实际一致，表明该系统的测试稳定性较高。经过分析，系统最小可探测到每秒钟几百个光子， 可用于经滤光片衰减后达光子计数水平的滤光片透过率测试。 关键词：ICCD；光子计数；透过率；多帧图像累加；连通区域标记 中图分类号：TN247 文献标识码：A 文章编号：1001-8891(2017)08-0710-07 Optical Filter Transmittance Test Based on ICCD Photon Counting CHEN Qun，XU Xin ，WANG Zhenyao ，QIAN Yunsheng (School of Electronic Engineering and Optoelectronic Technology, Nanjing University of Science and Technology, Nanjing 210094, China) Abstract ：A photon counting imaging system based on ICCD is designed to solve the problem that the transmittance is difficult to be measured by general measuring instruments when the light is cut by deep cut-off filter and reaches to the photon counting level. The operating principles of the system, hardware components, and software algorithms used for image processing are introduced. Furthermore, the algorithm used to calculate the transmittance from the number of photons transmitted per unit time is tested and the transmittance of a solar blind filter is calculated. Our studies reveal that, within a specific wavelength range, although the numerical result obtained using our algorithm is smaller than what is observed in experiments, the order of magnitude is the same in the two cases, th