Model-based defect detection on structured surfaces having optically unresolved features

作者:O'Connor Daniel*; Henning Andrew J; Sherlock Ben; Leach Richard K; Coupland Jeremy; Giusca Claudiu L
来源:Applied Optics, 2015, 54(30): 8872-8877.
DOI:10.1364/AO.54.008872

摘要

In this paper, we demonstrate, both numerically and experimentally, a method for the detection of defects on structured surfaces having optically unresolved features. The method makes use of synthetic reference data generated by an observational model that is able to simulate the response of the selected optical inspection system to the ideal structure, thereby providing an ideal measure of deviation from nominal geometry. The method addresses the high dynamic range challenge faced in highly parallel manufacturing by enabling the use of low resolution, wide field of view optical systems for defect detection on surfaces containing small features over large regions.

  • 出版日期2015-10-20