成像前光学调制系统的眩光测量

A Measurement Method for Glare Based on the Optical Modulation System before Image Formation

因为眩光与成像光线混叠的复杂性,使得对它的测量和评价一直是物理光学里的研究热点。本文设计了一套计算型视觉成像前调制处理双臂式实验系统来解决眩光与成像光线的物理分离,并针对金属表面镜面反射引起的镜头眩光完成测量实验。实验结果数据证明了提出的眩光测量方法的有效性。本方法为针对眩光效应的定性评价提供了参考性的量化依据。另外为视觉测量研究中因高亮光引起的镜头眩光去除问题提供了解决途径。

Since glare is mixed with imaging rays, the measurement and the evaluation are always difficult research issues on physical optics. This paper describes the physical characteristics of glare by point spread function. Subsequently, a measurement method for scattering glare is proposed. Specifically, a computational processor before image formation is presented as two-arm system. The feedback subsystem is composed of digital micro-mirror device and charge-coupled device. The collection of images and modulation of glare rays is utilized by feedback subsystem to reconstruct the glare distribution. Finally, experimental results show the performance of the proposed approach. The proposed method provides the foundation to evaluate the scattering glare. In addition, the paper suggests a solving way of removing glare in visual measurement.