Fast numerical Fourier analysis of moire pattern induced by a periodic metallic array on top of the microscopically patterned red-green-blue light sources

摘要

An accurate and fast moire pattern analysis algorithm is proposed for a periodic metallic array placed adjacent to a patterned red-green-blue (RGB) light source with a microscopic gap utilizing Fourier transform along with the human eye contrast sensitivity function. We analyzed how the moire pattern evolved varying tilt angles and metal array periodicities placed on the top of RGB light sources, which have their own spatial periodicities. Based on multiplicative model, moire patterns were numerically generated and the influences of 70 tilt angles and 60 periodicities on the moire standard deviation were thoroughly analyzed to minimize moire visibility. Our numerical results were compared to a prior analytical approach to obtain a good agreement, and the proposed scheme can be further applied to larger scale display systems with sophisticated touch screen metal arrays. (C) 2018 Optical Society of America