CAJ | 학술논문

为了精准且快速的检测红外透镜的性能，设计了一套基于图像处理的快速红外CCD自动调焦测量系统，采用波长范围为3.7~4.8μm的中波制冷红外CCD相机，对透过红外镜头产生的像自动聚焦进行二次成像，通过图像的快速处理和分析，以检测镜头对称性和焦距等性能。重点分析了目前常用的自动对焦技术，针对该检测系统提出了灰度熵与统计学函数有机结合的自动聚焦方法，并通过大量的检测结果进行验证。实验结果表明系统重复定位的位置精度达到10μm。
위료정준차쾌속적검측홍외투경적성능，설계료일투기우도상처리적쾌속홍외CCD자동조초측량계통，채용파장범위위3.7~4.8μm적중파제랭홍외CCD상궤，대투과홍외경두산생적상자동취초진행이차성상，통과도상적쾌속처리화분석，이검측경두대칭성화초거등성능。중점분석료목전상용적자동대초기술，침대해검측계통제출료회도적여통계학함수유궤결합적자동취초방법，병통과대량적검측결과진행험증。실험결과표명계통중복정위적위치정도체도10μm。
In order to detect the performance of infrared lens accurately and rapidly, an auto focus measurement system with rapid infrared CCD was put forward, based on image processing. In this system, mid-wave cooled infrared CCD was used, whose wave length ranges from 3.7-4.8 μm. The infrared CCD received the radiation which came through the detecting infrared lens, auto focus and image processing. By using the technology of auto-focus and image processing, the performance of the lens such as symmetry or focus and so on would be test. In this article, the modern auto-focus methods were emphasized, and the auto focus method suit for this detection system was put forward. A new image clarity evaluation organically combined grey entropy with statistics function was described, and was verified by a lot of testing results. The experimental results show that the position precision of the system resetting is up to 10μm.