超快平面显微成像技术

Ultra-fast Surface Microscopic Imaging Technique

快速成像技术在很多领域都有着重要的应用,本文基于超短光脉冲的时-空-频映射原理,提出并实现了一种超快平面显微成像技术。利用色散傅里叶变换及空间色散器件把光脉冲的宽带频谱信息分别映射到时域和空域,利用高速光电探测器进行串行单像素成像,最终获得了帧速率为20.9 MHz,空间分辨率为22μm和55μm的一维及二维平面成像系统。在实验中用标准的分辨率目标板验证了成像效果。该技术为超快成像提供了一种有效手段,并将应用于高速平面检测等多个领域。

Fast imaging techniques have important applications in many fields.An ultra-fast surface microscopic imaging technique is proposed and demonstrated.This technique is based on the time-space-frequency mapping of ultrashort optical pulses.Based on dispersive Fourier transform and spatial dispersion devices,the optical spectrum is mapping on time and space domain separately.The image is reconstructed after a high speed serial single-pixel photo detector.A one and two-dimensional imaging system with the frame rate of 20.9 MHz,22μm and55μm spatial resolution is realized.Imaging experiments with standard resolution targets are successfully demonstrated.This technique is an effective method for ultrafast imaging and can be used for high speed surface inspection.