Lenses are polished by the diamond particles contained in grindstones. This study reports the development of grindstones using the metal plating technique. Various factors that affect lens duality were analyzed. It was considered that the concentration (or density) of diamond particles is most important. It is necessary to further study the correlation between diamond particle density and the performance of lens. The diamond particle concentration in the metal plating bath was used as the input signal and the one in the grindstone was observed as the output to calculate the dynamic SN ratio. From the study, a better adjustability of diamond particle density in grindstones was achieved.
