About MITACHI S
About NTT Opto-electronics Lab., Ibaraki-ken, JPN
About NAGASE R
About NTT Opto-electronics Lab., Ibaraki-ken, JPN
About TAKEUCHI Y
About NTT Opto-electronics Lab., Ibaraki-ken, JPN
About HONDA R
About NTT Opto-electronics Lab., Ibaraki-ken, JPN
About Glass Technology
About glass-ceramics
About Manufacturing of glass
About Optical waveguide,optical fibers,and fiber optics
About テレコミュニケーション
About 結晶化ガラス
About 円管