O.Pandithurai, et al. “Optical Grating Diffraction and Optical Beat Frequency Principle-Based Ultrahigh Resolution Displacement Measurement System”. International Journal on Recent and Innovation Trends in Computing and Communication 11, no. 4 (April 30, 2023): 400–404. Accessed February 1, 2026. https://www.ijritcc.org/index.php/ijritcc/article/view/9849.