像增强器噪声频谱特性测试技术研究  

Frequency Spectrum Measurement of Noise of Image Intensifiers

作　　者：钱芸生[1] 常本康[1] 童默颖[1] 刘磊[1] 

机构地区：[1]南京理工大学电子工程与光电技术学院,南京210094

出　　处：《光学学报》2003年第1期67-70,共4页Acta Optica Sinica

基　　金：国防重点预研项目资助课题

摘　　要：对一台进口的像增强器信噪比 (SNR)测试仪进行改造 ,重新研制和设计了测试仪的信号处理模块、计算机系统和测试软件 ,采用硬件滤波、软件数字滤波和快速傅里叶变换 (FFT)相结合的方法实现了像增强器噪声的频谱特性测试。利用所研制的测试仪对多种型号的进口和国产像增强器的噪声频谱进行了测试分析 ,并给出了分析测试结果。An imported signal-to-noise ratio (SNR) measuring system for image intensifiers is reconstructed. The signal processing module, computer module and measurement software of the system are redeveloped. The frequency spectrum measurement of noise of image intensifiers is achieved by integrating Fast Fourier Transform (FFT) with hardware filter and digital filter. The improved system is used to analyze frequency spectra of noise of homemade and imported image intensifiers. The results are given and analyzed.

关 键 词：信号检测 像增强器 频谱特性 信噪比 噪声测试 

分 类 号：TN144[电子电信—物理电子学]