High-speed 3D Optical Metrology for In-situ Applications

这笔赠款提供资金，以探索一种新的自动光学方法，用于以微米精度精确测量闪亮物体的三维（3D）结构（例如，金属部件）并同时真实的实时处理3D内容以用于现场应用（例如，感测、监控和检查）。本研究的目的是测试的假设，更好的精度，更高的速度，和更大的灵活性，可以实现与二进制散焦技术的三维光学计量和三维信息处理。该方法是1）从理论和实验上研究用于克服现有3D光学计量方法的局限性的二进制散焦技术; 2）探索用于测量发光物体表面的自动化3D光学计量框架;以及3）进一步研究用于现场应用的真实的时间处理3D视频内容的新方法。如果成功，该项目将产生两个主要研究成果：1）一种用于自动测量难以测量的物体（例如，闪亮的物体），以及2）一种用于3D视频数据处理的新的计算框架。这种提出的技术将通过提供物理对象的定量测量来改变许多领域，包括用于先进制造（例如，增材制造）和原位检测;还将为包括医学、计算机科学以及其他工程学科在内的科学领域引入新的范例。从这项研究中获得的知识也将对社会产生许多好处。例如，高速3D传感技术将通过提供用于现场检测和传感的新工具来大大增强制造业的竞争力。3D相机/传感器制造是一个价值数十亿美元的行业，因此3D相机/传感器的商业化可能会给美国带来巨大的经济利益。

This grant provides funding to explore a novel automated optical method for precisely measuring three-dimensional (3D) structures at micrometer accuracy for shiny objects (e.g., metal parts) and simultaneously process 3D contents in real time for in-situ applications (e.g. sensing, monitoring, and inspection). The objective of the research is to test the hypothesis that better accuracy, higher speed, and more flexibility can be achieved with the binary defocusing technique for 3D optical metrology and for 3D information processing. The approach is 1) to theoretically and experimentally investigate binary defocusing technique for overcoming the limitations of existing 3D optical metrology methods; 2) to explore an automated 3D optical metrology framework for measuring shiny object surfaces, and 3) to further investigate novel methods to process 3D video contents in real time for in-situ applications. If successful, this project will result in two major research outcomes: 1) a novel instrumentation for automatically measuring objects difficult to be measured (e.g., shiny objects), and 2) a novel computational framework for 3D video data processing. This proposed technique will transform many fields by providing quantitative measure of physical objects including monitoring, sensing, and control for advanced manufacturing (e.g., additive manufacturing) and in-situ inspection; and will also introduce new paradigms to scientific areas including medicine, computer science, as well as other engineering disciplines. Knowledge gained from this research will also have many benefits to the society. For example, the high-speed 3D sensing techniques will drastically strengthen the competitiveness of the manufacturing industry by providing a novel tool for in-situ inspection and sensing. The 3D camera/sensor manufacturing is a multi-billion dollar industry, and thus commercializing 3D camera/sensor could have great economic benefits to the United States.