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.
出处
《光学学报》
EI
CAS
CSCD
北大核心
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
