圆锥形光学扫描层析成像寻的系统研究  

Optical Tomography Imaging System of Conical Scan

作　　者：李保生[1] 王易诚 卢荣胜[1] 

机构地区：[1]合肥工业大学仪器科学与光电工程学院,合肥230009

出　　处：《光电工程》2016年第2期33-39,共7页Opto-Electronic Engineering

基　　金：国家自然科学基金资助项目(61174195)

摘　　要：本文建立了基于单像素探测器的光学层析系统,为现代军事制导红外成像技术提供一种新的成像方法。利用了光学层析成像可以获得高分辨率图像的特点,设计出潜望镜圆锥形光学扫描系统和65条狭缝的调制盘。通过光学系统在调制盘狭缝的多角度旋转扫描获得一维投影值,利用滤波反投影加速算法,对层析信号进行重构处理从而获得待测物体的二维图像。单像素探测器具有高频率响应,与滤波反投影加速算法和硬件加速结合,可以实现高速图像获取。对设计的光学系统进行实体验证,计算了65条狭缝层析成像系统参数,并研究在各种加性噪声下,重构结果和直接成像结果的比较,验证了成像系统具有良好的信噪比特性。本文对于发展新型的光电跟踪系统,提高目标跟踪系统的作用距离和范围提供了理论依据。This paper establishes the optical tomography system based on single pixel detector, and it provides a new imaging method for the modem infrared imaging guidance technology in military. It designs conical scan periscope optics and modulating plate with 65 slits, making a good use of the high resolution of optical tomography system. Projection values of single dimension are obtained by the modulating plate scanning, which can rebuild the two-dimensional image of the testing object by the filter back projection accelerating algorithm. The single pixel detector with high frequency response is combined with hardware acceleration and accelerating algorithm of filter back projection, which can realize high-speed image acquisition. The paper simulates the whole optical system practically, and tomographic imaging system parameters with 65 slits are calculated. Studying the comparison of results between image reconstruction without noise and image reconstruction with noise, it is verified that imaging system has a good signal-to-noise ratio. This method plays an important role in developing novel target tracking system and provides deep foundation for deeper experimental research

关 键 词：目标跟踪 层析成像 加速算法 信噪比 

分 类 号：O436[机械工程—光学工程] TN219[理学—光学]