Miniaturization design of transmission optical correlator
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摘要: 针对光学相关器的技术指标，对其光学系统进行小型化设计。傅里叶透镜组与准直扩束系统均采用摄远型式结构，在满足其长焦距的前提下缩短了系统的光学筒长；采用直角反射棱镜折叠空间光路充分利用空间，使系统布局更紧凑；利用计算机辅助设计软件ZEMAX对光学系统结构进行优化，最后研制出的小型化透射式光学相关器总长在150 mm以内，总宽在130 mm以内，实现了小型化目的。改进后的光学系统结构为双光路处理结构，具有实时性强的优点。经实验验证，该装置具有较好的相关探测性能，并且噪声小、探测精度高。Abstract: A miniaturization design of optical system was accomplished based on the technical specifications of optical correlators. Both the Fourier-transform lens and the collimating and beam expanding system adopted the telephoto structure, which could maintain the long focal length and decrease the optical tube length. The optical path was folded with right-angle reflection prism to make the system layout more compact. The structure of the optical system was optimized with ZEMAX. The total length of the miniature optical correlator was less than 150 mm, and the system width was less than 90 mm. This improved optical system utilized double optical path processing structure, and achieved real-time recognition. The experimental results demonstrate that the recognition system has a good correlative performance, as well as the features of low noise, high detection precision.
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