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引言早在1953年,美国密歇根大学首先开始研究和发展相干光学计算机系统,并与美国陆军和空军有关部门订立研究合同。该计划称之为“设想的密歇根”,这无疑是代表相干光学计算最成功应用之一。当时该大学发现,航空相干雷达信号处理中的电子匹配滤波和在圆锥透镜与入射雷达信号的相干照明两维记录间的互作用有着类似之处,由此促进了这个计划的发展。这种早期的光学计算机示于图1。在激光未发明前,这种计算机采用汞弧灯做光源,因此实时工作是不可能的,但是与等效的电子雷达信号处理方
As early as 1953, the University of Michigan first began to study and develop coherent optical computer systems and entered into research contracts with the U.S. Army and Air Force departments. Called “The Envisioned Michigan,” the plan is undoubtedly one of the most successful applications on behalf of coherent optics. At that time, the university found similarities between the electronically matched filter in airborne coherent radar signal processing and the two-dimensional recording of coherent illumination between conical lenses and incident radar signals, thereby contributing to the development of this program. This early optical computer is shown in Figure 1. Before a laser was invented, the computer used a mercury arc lamp as a light source, so working in real time was not possible, but with an equivalent electronic radar signal processor