A first review of optical edge-diffraction technology for precision dimensional metrology

  • ChaBum LeeEmail author


A comprehensive study relevant to displacement sensing techniques based on optical edge-diffraction has been first introduced in academic society. Dimensional sensors with nanometer resolution are key components of many precision imaging, positioning, and fabrication machines. Knife-edge techniques are commonly used for optical beam profiling of laser beams, but edge-diffraction sensing techniques for dimensional metrology was first introduced in 2006 and have been used for many dimensional metrology applications. This review paper outlines the computational approaches for optical edge-diffraction analysis and the case study for various displacement measurement applications. This review is the first report that summarizes literature relevant to displacement sensors based on optical edge-diffraction and discusses how optical edge-diffraction techniques enhance dimensional metrology in terms of accuracy, precision, sensitivity, bandwidth, and uncertainty. In addition, future applications for employing edge-diffraction techniques will be further discussed and highlighted.


Displacement Sensors Edge roughness Edge-diffraction Uncertainty 


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Funding information

The research was supported by the National Science Foundation (Award Number: CMMI 1463502) through Texas A&M University.


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© Springer-Verlag London Ltd., part of Springer Nature 2019

Authors and Affiliations

  1. 1.Department of Mechanical EngineeringTexas A&M UniversityCollege StationUSA

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