Kim, Y. G., H. G. Rhee, Y. S. Ghim, S. Y. Lee, and J. H. Lee. 2017. “Direct Laser Fabrication Method for a Binary Diffractive Optical Element”. Journal of Advanced Manufacturing Technology (JAMT) 11 (2), 59-66. https://jamt.utem.edu.my/jamt/article/view/1888.