采用光学扫描的实时全息术美国弗吉尼亚技术公司光学图象处理实验室的研究人员最近发展了一种实时光学全息记录技术。这种技术采用两束时变频率激光对“物体”两维扫描。用光电探测器收集并输出由含扫描物体振幅和相位信息散射所产生的外差电信号。此外差信号被解调并与扫... Real-time holography with optical scanning Researchers at the Optical Image Processing Laboratory at Virginia Tech recently developed a real-time optical holographic recording technique. This technique uses two beams of time-varying frequency laser for “object” two-dimensional scanning. A photodetector is used to collect and output the heterodyne electrical signal resulting from the scattering of the amplitude and phase information of the object being scanned. In addition, the difference signal is demodulated and ...