Kaikaew, E. ., Khumpad, K. . ., Kammesawang, W. ., Supol, D. . and Paikoompan, T. . (2021) “Training Kit for the Performance of Optical ”, RMUTL Engineering Journal, 6(2), pp. 19–28. doi: 10.14456/rmutlengj.2021.8.