新型联合变换相关器光学系统设计

Optical system design of new-type joint transform correlator

以往联合变换相关器的光学系统结构是一支光路反馈,实时性差且体积大。针对其缺点,设计了一种具有双光路的联合变换相关器。其中,最主要的特点是傅里叶透镜组与准直扩束系统共用同一片正透镜。改进后的装置可以清晰地探测到相关点,并具有体积小的特点。

The optical system structure of traditional joint transform correlator uses single optical path feedback, it couldn＇t realize real-time identification, and volume is large. To improve its performance, a joint transform correlator with double optical path is developed. The main characteristic of the designed optical system is that Fourier transforms lens and collimating and beam expanding system uses the same lens. Test result shows that the correlation point is detected distinctly. Furthermore, volume of developed joint transform correlator is smaller than before.